Chengdu Ebyte Electronic Technology E22900T22S Lora Module User Manual E01 2G4M27D v1 0
Chengdu Ebyte Electronic Technology Co., Ltd. Lora Module E01 2G4M27D v1 0
User Manual
E22-900T22S User Manual
SX1262 SMD Wireless Module
CONTENTS
1. OVERVIEW........................................................................................................................................3
1.1 INTRODUCTION............................................................................................................................................................... 3
1.2 FEATURES........................................................................................................................................................................3
1.3 APPLICATION...................................................................................................................................................................3
1.4 FUNCTION INTRODUCTION...............................................................................................................................................4
2. SPECIFICATION AND PARAMETER..............................................................................................5
2.1 LIMIT PARAMETER............................................................................................................................................................ 5
2.2 OPERATING PARAMETER...................................................................................................................................................5
3. SIZE AND PIN DEFINITION........................................................................................................... 6
4. CONNECT TO MCU.........................................................................................................................8
5. FUNCTION DESCRIPTION............................................................................................................. 8
5.1 FIXED TRANSMISSION.......................................................................................................................................................8
5.2 BROADCASTING TRANSMISSION........................................................................................................................................9
5.3 BROADCASTING ADDRESS.................................................................................................................................................9
5.4 MONITOR ADDRESS......................................................................................................................................................... 9
5.5 RESET............................................................................................................................................................................. 9
5.6 AUX DESCRIPTION........................................................................................................................................................ 10
5.6.1 Indication of UART output
................................................................................................................................
10
5.6.2 Indication of wireless transmitting
...................................................................................................................
10
5.6.3 Configuration procedure of module
................................................................................................................
11
5.6.4 Notes for AUX
....................................................................................................................................................
11
6. OPERATING MODE.......................................................................................................................11
6.1 MODE SWITCHING.........................................................................................................................................................12
6.2 NORMAL MODE（MODE 0）........................................................................................................................................12
6.3 WOR MODE（MODE 1）............................................................................................................................................ 13
6.4 CONFIGURATION MODE（MODE 2）............................................................................................................................ 13
6.5 DEEP SLEEP MODE（MODE 3）.................................................................................................................................... 13
7. REGISTER READ AND WRITE CONTROL...................................................................................13
7.1 COMMAND FORMAT......................................................................................................................................................13
7.2 REGISTER DESCRIPTION.................................................................................................................................................. 15
7.3 FACTORY DEFAULT PARAMETER...................................................................................................................................... 17
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8. REPEATER NETWORKING MODE...............................................................................................17
9. CONFIGURATION INSTRUCTIONS ON COMPUTER...............................................................18
10. HARDWARE DESIGN..................................................................................................................19
11. FAQ............................................................................................................................................... 20
11.1 COMMUNICATION RANGE IS TOO SHORT......................................................................................................................20
11.2 MODULE IS EASY TO DAMAGE......................................................................................................................................20
11.3 BER(BIT ERROR RATE)IS HIGH..................................................................................................................................21
12. PRODUCTION GUIDANCE........................................................................................................ 21
12.1 REFLOW SOLDERING TEMPERATURE.............................................................................................................................. 21
12.2 REFLOW SOLDERING CURVE......................................................................................................................................... 22
13. E22 SERIES................................................................................................................................... 22
14. ANTENNA RECOMMENDATION............................................................................................. 23
15. PACKAGE FOR BATCH ORDER................................................................................................. 23
REVISION HISTORY.......................................................................................................................... 24
ABOUT US.......................................................................................................................................... 24
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1. Overview
1.1 Introduction
E22-900T22S is a wireless serial port module (UART) based on SEMTECH's SX1262 RF chip. Working in the
902MHz~928MHz, (default 900.125MHz), LoRa spread spectrum technology, TTL level output, compatible with
3.3V and 5V IO port voltage.
LoRa direct sequence spread spectrum technology will bring longer communication distance, and has the
advantages of concentrated power density and strong anti-interference ability. The module has a software FEC
forward error correction algorithm, which has high coding efficiency and strong error correction capability. In the
case of sudden interference, it can actively correct the interfered data packets, greatly improving reliability and
transmission distance. When without FEC, such packets can only be discarded.
The module has data encryption. Data transmitted over the air, with randomness, makes data interception
meaningless through strict encryption and decryption algorithms. The module reserves multiple IO interfaces to
provide custom development services.It supports packet length setting and also supports different real-time and
data packets.
1.2 Features
Communication distance tested is up to 5km
Maximum transmission power of 182.8mW;
Support the global license-free ISM 915MHz band;
Support air date rate of 0.3kbps～62.5kbps;
Support new generation LoRa technology based on SX1262;
Compared with SX1276, the power consumption of hardware is reduced by 40%,and the power consumption
of software is reduced by 35%;
Compared with the SX1276, for the same power consumption, the transmission power is increased by 80%;
Low power consumption for battery supplied applications;
Support 2.3V~5.5V power supply, power supply over 5.0 V can guarantee the best performance;
Industrial grade standard design, support -40 ~ 85 °C for working over a long time;
IPEX and stamp hole optional, good for secondary development and integration.
1.3 Application
Home security alarm and remote keyless entry;;
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Smart home and industrial sensors;
Wireless alarm security system;
Building automation solutions;
Wireless industrial-grade remote control;
Health care products;
Advanced Meter Reading Architecture(AMI);
Automotive industry applications.
1.4 Function introduction
LoRa spread spectrum: LoRa direct sequence spread spectrum technology will bring longer communication distance;
low transmit power density, it is not easy to cause interference to other equipment.
High confidentiality, extremely low probability of interception; strong anti-interference ability, strong suppression of
co-channel interference and various noises; excellent anti-multipath fading performance.
LBT: The module has a Listen before talk (LBT) function. When this function is enabled, the module actively monitors the
channel environment noise before transmitting. If the noise exceeds the threshold, it will be sent delayed. This feature can
greatly improve the communication success rate of the module in harsh environments. This function can be used for
network transmission and anti-collision processing.
RSSI: The signal strength indication function. The module supports packet signal strength serial output. Can be used to
assess signal quality, improve communication networks, and ranging. The module supports ambient noise signal strength
serial output. It can be used to implement LBT functions manually.
Wireless configuration: Remotely configure or read wireless module parameters by sending command packets
wirelessly.
Networking function: The module can implement multi-level repeater networking. Multi-level repeater is suitable for
ultra long-distance communication. Multiple networks in the same area can run simultaneously.
Ultra-low power consumption: the air wake-up function. It is especially suitable for battery-powered applications: when
the module is in WOR state, the configuration module WOR monitors the overall power consumption of the adjustable
module. The maximum configurable response delay of the module is 4000ms. The average current of the module in this
mode is about 2uA.
Fixed-point transmission: supports address function, the host can transmit data to any address, any channel, to achieve
networking, repeater and other application. For example: module A transmits data to module B (address is 0x00 01,
channel is 0x80), date is AA BB CC, the communication format is: 00 01 80 AA BB CC, where 00 01 is the module B address
and 80 is the module B channel, then module B can receive the AA BB CC (other modules do not receive data).
Broadcast monitoring: Set the module address to 0xFFFF, which can monitor the data transmission of the module on the
same channel; the transmitted data can be received by the module of any address on the same channel, thus playing the
role of broadcasting and monitoring.
Forward error correction: The module has FEC forward error correction algorithm, which has high coding efficiency and
strong error correction capability. In the case of sudden interference, it can actively correct the interfered data packets,
greatly improving reliability and transmission distance. When without FEC, such packets can only be discarded.
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Deep sleep function: When the module is in sleep mode, mode 3, the wireless receiver is turned off and the
micro-controller is in a sleep state; at this time, the power consumption of the whole device is about 2uA.
Watchdog: The module has a built-in watchdog and performs precise time layout. Once an exception occurs, the
module will restart within 1 second and continue to work according to the previous parameter settings.
Parameter saving: After the user sets the parameters, the module parameters will be saved, the power will not be lost,
and the module will work according to the set parameters after power-on.
Applicable environment: 900MHz is free frequency band, users can use it directly without application; 900MHz features
certain penetration and diffraction ability, suitable for environment with small data volume, long transmission distance
and easy to be interfered.
2. Specification and parameter
2.1 Limit parameter
Main parameter
Performance
Remark
Min.
Max.
Power supply（V）
0
5.5
Voltage over 5.5V will cause permanent
damage to module
Blocking power（dBm）
-
10
Chances of burn is slim when modules
are used in short distance
Operating temperature（℃）
-40
85
/
2.2 Operating parameter
Main parameter
Performance
Remark
Min.
Typ.
Max.
Operating voltage（V）
2.3
5.0
5.5
≥5.0 V ensures output power
Communication level（V）
3.3
For 5V TTL, it may be at risk of burning
down
Operating temperature（℃）
-40
-
85
Industrial design
Operating frequency（MHz）
902
-
928
Support ISM band
Power
consump
tion
TX current（mA）
133
Instant power consumption
RX current（mA）
11
Sleep current （μA）
469
Software is shut down
Max Tx power（dBm）
- - -
Receiving sensitivity（dBm）
-146
-147
-148
Air data rate is 2.4kbps
Air data rate（bps）
0.3k
2.4k
62.5k
Controlled via user’s programming
Main parameter
Description
Remark
Distance for reference
5000m Test condition：clear and open area, antenna gain: 3dBi，
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antenna height: 2.5m，air data rate: 2.4kbps
TX length
240 Btye
Can be configured via command as 32/64/128/240
bytes per packet to transmit
Buffer
1000 Btye
Modulation
LoRa
Communication interface UART
Package SMD
Connector 1.27mm
Size 16 * 26 mm
Antenna IPEX/stamp hole 50 ohm impedance
3. Size and pin definition
No.
Name
Direction
Function
1
GND
Ground
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2
GND
Ground
3
GND
Ground
4
GND
Ground
5
M0
Input
（weak pull-up）
Work with M1 to decide 4 working modes of module (not suspended, if not
used, could be grounded).
6
M1
Input
（weak pull-up）
Work with M0 to decide 4 working modes of module (not suspended, if not
used, could be grounded).
7
RXD
Input
TTL UART inputs, connects to external (MCU, PC) TXD output pin. Can be
configured as open-drain or pull-up input.
8
TXD
Output
TTL UART outputs, connects to external RXD (MCU, PC) input pin. Can be
configured as open-drain or push-pull output
9
AUX
Output
To indicate module ’ s working status & wakes up the external MCU.
During the procedure of self-check initialization, the pin outputs low level.
Can be configured as push-pull output (suspending is allowed).
10
VCC
Power supply ：2.3~ 5.2V DC
11
GND
Ground
12
NC
13
GND
Ground
14
NC
15
NC
16
NC
17
NC
18
NC
19
GND
Ground
20
GND
Ground
21
ANT
Antenna
22
GND
Ground
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4. Connect to MCU
No.
Description（STM8L MCU）
1
The UART module is TTL level.
2
For some MCU works at 5VDC, it may need to add 4-10K pull-up resistor for the TXD & AUX pin.
5. Function description
5.1 Fixed transmission
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5.2 Broadcasting transmission
5.3 Broadcasting address
For example: Set the address of module A as 0xFFFF or 0x0000, and the channel as 0x04;
When module is the transmitter (transparent transmission), all modules under channel 0x04 will receive the data, the
purpose of broadcast is realized.
5.4 Monitor address
For example: Set the address of module A as 0xFFFF or 0x0000, and the channel as 0x04;
When module A is the receiver, it can receive the data sent from all modules under channel 0x04, the purpose of monitor
is realized.
5.5 Reset
When the module is powered, AUX outputs low level immediately, conducts hardware self-check and sets the operating mode
based on user’s parameters. During the process, the AUX remains low level. After the process completed, the AUX outputs high
level and starts to work as per the operating mode combined by M1 and M0. Therefore, users need to wait the AUX rising edge
as the start of module’s normal work.
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5.6 AUX description
AUX Pin can be used as indication for wireless send & receive buffer and self-check.
It can indicate whether there are data that are not sent yet via wireless way, or whether all wireless data has been sent
through UART, or whether the module is still in the process of self-check initialization.
5.6.1 Indication of UART output
To wake up external MCU
5.6.2 Indication of wireless transmitting
Buffer (empty): the internal 1000 bytes data in the buffer are written to the RFIC (Auto sub-packaging). When AUX=1, the
user can input data less than 1000 bytes continuously without overflow. Buffer (not empty): when AUX=0, the internal 1000
bytes data in the buffer have not been written to the RFIC completely. If the user starts to transmit data at this circumstance, it
may cause overtime when the module is waiting for the user data, or transmitting wireless sub package.When AUX = 1, it does
not mean that all the UART data of the module have been transmitted already, perhaps the last packet of data is still in
transmission.
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5.6.3 Configuration procedure of module
Only happened when power-on resetting or exiting sleep mode
5.6.4 Notes for AUX
No.
Description
1
For function 1 & function 2 mentioned above, the priority should be given to the one with low level output, which means
if it meets each of any low level output condition, AUX outputs low level, if none of the low level condition is met, AUX
outputs high level.
2
When AUX outputs low level, it means the module is busy & cannot conduct operating mode checking. Within 1ms since
AUX outputs high level, the mode switch will be completed.
3
After switching to new operating mode, it will not work in the new mode immediately until AUX rising edge lasts for 2ms .
If AUX stays on the high level, the operating mode switch can be effected immediately.
4
When the user switches to other operating modes from mode 3 (sleep mode) or it’s still in reset process, the module will
reset user parameters, during which AUX outputs low level.
6. Operating mode
There are four operating modes, which are set by M1 and M0, the details are as follows:
Mode(0-3)
M1
M0
Description
Remark
0 Normal mode
0
0
UART and wireless channel are open, transparent
transmission is on
Supports configuration over air via
special command
1 WOR mode
0
1
Can be defined as WOR transmitter and WOR receiver
Supports wake up over air
2 Configuration
mode
1
0
Users can access the register through the serial port to
control the working state of the module
3 Deep sleep mode
1
1
Sleep mode
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6.1 Mode switching
No.
Remark
1
Users can combine M1 and M0 with high and low levels to determine the operating mode. Two GPIOs of the
MCU can be used to control mode switching;
After changing M1 and M0: If the module is idle, after 1ms, it can start working according to the new mode;
If the serial port data of the module has not been transmitted through the wireless, the new working mode can
be switched after the transmission is completed;
If the module receives the wireless data and transmits the data through the serial port, it needs to finish
transmission before switching the new working mode;
Therefore, mode switching can only be valid when AUX output is 1, otherwise it will delay switching.
2
For example, users continuously inputs a large amount of data and simultaneously performs mode switching. At
this time, the switching mode operation is invalid; the module will process all the user data before performing the
new mode detection;
Therefore, the general recommendation is to detect the output state of the AUX pin and switch after 2ms when
the output is high.
3
When the module is switched from other modes to sleep mode, if the data has not been processed yet;
The module will process these data (including receiving and sending) before entering sleep mode. This feature
can be used for fast sleep, which saves power; for example, the transmitter module works in mode 0, the user
transmits the serial port data "12345", and then does not have to wait for the AUX pin to be idle (high level), and
can directly switch to sleep mode. And the user's main MCU immediately sleeps, the module will automatically
transmit the user data through the wireless, and automatically enters sleep within 1ms;
This saves MCU's working time and reduces power consumption.
4
Similarly, any mode switching can use this feature. After the module processes the current mode event, it will
automatically enter the new mode within 1ms; thus eliminating the need for the user to query AUX and achieve
the purpose of fast switching;
For example, switching from the transmit mode to the receive mode; the user MCU can also enter sleep before
the mode switch, and use the external interrupt function to acquire the AUX change, thereby performing mode
switching.
5
This operation mode is very flexible and efficient, and is designed according to the user's MCU's operation
convenience, and can reduce the workload of the entire system as much as possible, improve system efficiency,
and reduce power consumption.
6.2 Normal mode（Mode 0）
Type
M0 = 0，M1 = 0
Transmitting
Users can input data through the serial port and the module will start wireless transmission.
Receiving
The module wireless receiving function is turned on, and after receiving the wireless data, it will be output through the
serial port TXD pin.
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6.3 WOR mode（Mode 1）
Type
M0 = 1，M1 =0
Transmitting
When defined as a transmitting party, a preamble is automatically added before transmitting.
Receiving
It can receive data normally, the receiving function is the same as mode 0.
6.4 Configuration mode（Mode 2）
Type
M0 = 0，M1 = 1
Transmitting
Wireless transmitting off
Receiving
Wireless receiving off
Configuration
Users can access the registers to configure the module's operation state.
6.5 Deep sleep mode（Mode 3）
Type
M0 = 1，M1 = 1
Transmitting
Unable to transmit wireless data
Receiving
Unable to receive wireless data
Note
When from the sleep mode to other modes, the module will reconfigure the parameters. During the configuration
process, AUX will remain low; After configuration,it outputs high level, we suggest that user test rising edge T_BUSY.
7. Register read and write control
7.1 Command format
In configuration mode (mode 2: M1 = 1, M0 = 0), the list of supported commands are as follows (only 9600, 8N1 format is
supported when)：
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No.
Command format
Description
1
Set register
Command: C0+starting address+length+parameters
Response: C1+starting address+length+parameters
E.g 1: Channel is 0x09
command starting address length parameter
Send: C0 05 01 09
Returen: C1 05 01 09
E.g 2: Configure module address (0x1234), network address (0x00), serial port (9600 8N1) and air data
rate (1.2K).
Send: C0 00 04 12 34 00 61
Return: C1 00 04 12 34 00 61
2
Read register
Command: C1+starting address+parameters
Response: C1+starting address+length+parameters
E.g 1：Read channel
command starting address length parameter
Send: C1 05 01
Returen: C1 05 01 09
E.g 2: Read module address, network address, serial port and air data rate.
Send: C1 00 04
Return: C1 00 04 12 34 00 61
3
Set temporary
registers
Command: C2+starting address+parameters
Response: C1+starting address+length+parameters
E.g 1: Channel is 0x09
command starting address length parameter
Send: C2 05 01 09
Returen: C1 05 01 09
E.g 2: Configure module address (0x1234), network address (0x00), serial port (9600 8N1) and air data
rate (1.2K).
Send: C2 00 04 12 34 00 61
Return: C1 00 04 12 34 00 61
5
Wireless
configuration
Command: CF CF + normal command
Respond：CF CF + normal respond
E.g 1: Channel is 0x09
Command head command starting address length parameter
Send: CF CF C0 05 01 09
Returen: CF CF C1 05 01 09
E.g 2: Configure module address (0x1234), network address (0x00), serial port (9600 8N1) and air data
rate (1.2K).
Send: CF CF C2 00 04 12 34 00 61
Return: CF CF C1 00 04 12 34 00 61
6
Wrong format
Wrong format respond: FF FF FF
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7.2 Register description
Address
Read or
write
Name
Description
Remark
00H
Read/W
rite
ADDH
ADDH（default 0）
The module address is high byte and low byte.
Note: When the module address is FFFF, it can be
used as the broadcast and monitor address, that
is the module will not perform address filtering.
01H
Read/W
rite
ADDL
ADDL（default 0）
02H
Read/W
rite
NETID
NETID（default 0）
Network address, used to distinguish the network.
When communicating with each other, they
should be set to the same.
03H
Read/W
rite
REG0
7，6，5 UART: Serial port rate（bps）
000: 1200
001: 2400
010: 4800
011: 9600（default）
100: 19200
101: 38400
110: 57600
111: 115200
---------------------------------------
4，3： Serial parity bit
00：8N1（default）
01：8O1
10：8E1
11：8N1（equal to 00）
-----------------------------------
2，1，0，air data rate
000: 0.3k
001: 1.2k
010: 2.4k（default）
011: 4.8k
100: 9.6k
101: 19.2k
110: 38.4k
111: 62.5k
For the two modules that communicate with each
other, the serial port baud rate can be different,
and the verification method can also be different.
When transmitting large packets continuously,
users need to consider the data blocking caused
by the same baud rate, and data may even be
lost. It is generally recommended that both
parties have the same baud rate.
---------------------------------------
Both parties must be the same
The higher the rate, the shorter the distance
04H
Read/W
rite
REG1
7，6： Sub packet setting
00: 240 bytes（default）
01: 128 bytes
10: 64 bytes
11: 32 bytes
--------------------------------------
5 ：RSSI Ambient noise enable
1: Enable
0: Disable（default）
--------------------------------------
4，3，2 Reserve
--------------------------------------
1，0： Transmitting power
When the data is smaller than the sub packet
length, the serial output of the receiving end is an
uninterrupted continuous output.
When the data is larger than the sub packet
length, the receiving end serial port will output
the sub packet.
--------------------------------------------
When enabled, the C0 C1 C2 C3 command can be
sent in the transmitting mode or WOR
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00：22dbm（default）
01：17dbm
10：13dbm
11：10dbm
transmitting mode to read the register.
Register 0x00: Current ambient noise rssi
Register 0X01: rssi when the data was received last
time.
（Current channel noise is: dBm =-RSSI/2）
Command format: C0 C1 C2 C3 + starting address
+ read length
Returns: C1 + address address + read length + read
valid value
E.g: send C0 C1 C2 C3 00 01
Return C1 00 01 rssi
----------------------------------
Power and current are nonlinear, and power
efficiency is highest at maximum power.
The current does not decrease in proportion to
the decrease in power.
05H
Read/W
rite
REG2
Channel control（CH）
0-80 represents a total of 81 channels
Frequency= 850.125 + CH *1M
06H
Read/W
rite
REG3
7 Enable RSSI
1：Enable
0：Disable（default）
--------------------------------------
6， Fixed point transmission
1：Fixed point transmission mode
0 ： Transparent transmission mode
（default）
---------------------------------------
5 Enable reply
1：Enable repeater function
0：Disable repeater function
--------------------------------------
4 LBT enable byte (monitor before
transmission)
1：Enable
0：Disable（default）
--------------------------------------
3 WOR transceiver control
1：WOR transmitter
The module receiving and
transmitting functions are turned on, and a
wake-up code is added when transmitting
data. Receiving is turned on.
0：WOR receiver（default）
The module is unable to transmit
data and works in WOR monitoring mode. The
monitoring period is as follows (WOR cycle),
which can save a lot of power.
---------------------------------------
2，1，0，WOR cycle
000：500ms
When enabled, the module receives wireless data
and it will follow an RSSI strength byte after
output via the serial port TXD
.---------------------------------------
The module recognizes the first three bytes of the
serial data as: address high + address low +
channel and takes it as the wireless transmitting
target.
---------------------------------------
After the reply function is enabled, if the target
address is not the module itself, the module will
forward it once.
In order to prevent data return-back, it is
recommended to use it in conjunction with the
fixed point mode. That is: the target address is
different from the source address.
----------------------------------------
When enabled, wireless data will be monitored
before it is transmitted, which can avoid
interference to a certain extent, but may cause
data delay.
----------------------------------------
Valid only for mode 1.
After the WOR receiver receives the wireless data
and outputs it through the serial port, it will wait
for 1000ms before entering the WOR again. Users
can input the serial port data and return it via the
wireless during this period. Each serial byte will be
refreshed for 1000ms. Users must transmit the
first byte within 1000ms.
---------------------------------------------
Valid only for mode 1.
Period T = (1 + WOR) * 500ms, maximum
4000ms, minimum 500ms
The longer the WOR monitoring interval period,
the lower the average power consumption, but
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001：1000ms
010：1500ms
011：2000ms（default）
100：2500ms
101：3000ms
110：3500ms
111：4000ms
the greater the data delay
Both the transmitter and the receiver must be the
same (very important).
07H
Write
CRYPT_H
Key high byte (default 0）
Write only, read returns 0
Used for user encryption to avoid intercepting
airborne wireless data by similar modules.
The module will internally use these two bytes as
a calculation factor to transform and encrypt the
over-the-air wireless signal.
08H
Write
CRYPT_L
Key low byte (default 0)
80H~
86H
Read
only
PID
Product information 7 bytes
Product information 7 bytes
7.3 Factory default parameter
Factory default parameters：62 00 00 00 00 00
Model No.
Frequency
Address
Channel
Air data rate
Baud rate
Parity format
Power
E22-900T22S
900.125MHz
0x0000
0x32
2.4kbps
9600
8N1
22dbm
8. Repeater networking mode
No.
Description
1
After setting the repeater mode by configuration, switch to the normal mode and the repeater starts working.
2
In the repeater mode, ADDH, ADDL are no longer used as the module address, but is correspondingly paired with the
NETID. If the data of one of the networks is received, it is forwarded to another network. The network ID of the repeater
itself is invalid.
3
In repeater mode, the repeater module cannot transmit and receive data, and cannot perform low-power operation.
4
The user enters the other mode from mode 3 (sleep mode) or during the reset process, the module resets the user
parameters during which the AUX outputs low level.
Repeater networking rules:
1. Forwarding rules, the repeater can forward data in both directions between two NETIDs.
2. In repeater mode, ADDH\ADDL is no longer used as the module address, and it is used as a NETID forwarding pairing flag.
Figure:
1Primary repeater
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Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co.,Ltd.
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“Node 1” NETID is 08.
“Node 2” NETID is 33.
Primary repeater 1‘s ’ADDH\ADDL are 08，33.
So the signal sent by node 1 (08) can be forwarded to node 2 (33)
At the same time, node 1 and node 2 have the same address, so the data transmitted by node 1 can be received by node 2.
② Secondary repeater
Secondary repeater’s ADDH\ADDL are 33，05.
Therefore, Repeater 2 can forward the data of Repeater 1 to the network NETID: 05.
Thus node 3 and node 4 can receive node 1 data. Node 4 outputs data normally, and node 3 has a different address than node
1, so no data is output.
3Two-way repeater
As shown in the figure: the data sent by node 1, the nodes 2, 4 can receive the data sent by node 2, 4, and node 1 can also
receive it.
9. Configuration instructions on computer
The following figure shows the E22-900T22S configuration host computer display interface, the user can switch to the
command mode through M0M1, and quickly configure and read the parameters on computer.
Chengdu Ebyte Electronic Technology Co., Ltd. E22-900T22S User manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co.,Ltd.
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In the configuration on computer, the module address, frequency channel, network ID, and key are all in decimal mode.
The range of values of each parameter is:
Network address: 0-65535
Frequency channel: 0-80
Network ID: 0-255
Key: 0-65535
When the user configures the repeater mode using the host computer, special attention must be paid. Since the
parameters are in decimal mode in the host computer, the module address and network ID need to be converted into
hexadecimal. For example, if the network ID input by the transmitting end A is 02, and the network ID input by the
receiving end B is 10, when the repeater end R sets the module address, the hexadecimal value 0X020A is converted into
the decimal value 522 as the repeater end R. Module address. That is, the module address value of the repeater terminal
R is 522 at this time.
10. Hardware design
It is recommended to use a DC stabilized power supply. The power supply ripple factor is as small as possible,
and the module needs to be reliably grounded.;
Please pay attention to the correct connection of the positive and negative poles of the power supply.
Reverse connection may cause permanent damage to the module;
Please check the power supply to ensure it is within the recommended voltage otherwise when it exceeds the
maximum value the module will be permanently damaged;
Please check the stability of the power supply, the voltage can not be fluctuated frequently;
When designing the power supply circuit for the module, it is often recommended to reserve more than 30%
of the margin, so the whole machine is beneficial for long-term stable operation.;
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The module should be as far away as possible from the power supply, transformers, high-frequency wiring
and other parts with large electromagnetic interference.;
High-frequency digital routing, high-frequency analog routing, and power routing must be avoided under
the module. If it is necessary to pass through the module, assume that the module is soldered to the Top
Layer, and the copper is spread on the Top Layer of the module contact part(well grounded), it must be close
to the digital part of the module and routed in the Bottom Layer;
Assuming the module is soldered or placed over the Top Layer, it is wrong to randomly route over the
Bottom Layer or other layers, which will affect the module's spurs and receiving sensitivity to varying degrees;
It is assumed that there are devices with large electromagnetic interference around the module that will
greatly affect the performance. It is recommended to keep them away from the module according to the
strength of the interference. If necessary, appropriate isolation and shielding can be done;
Assume that there are traces with large electromagnetic interference (high-frequency digital, high-frequency
analog, power traces) around the module that will greatly affect the performance of the module. It is
recommended to stay away from the module according to the strength of the interference.If necessary,
appropriate isolation and shielding can be done.
If the communication line uses a 5V level, a 1k-5.1k resistor must be connected in series (not recommended,
there is still a risk of damage);
Try to stay away from some physical layers such as TTL protocol at 2.4GHz , for example: USB3.0;
The mounting structure of antenna has a great influence on the performance of the module. It is necessary to
ensure that the antenna is exposed, preferably vertically upward. When the module is mounted inside the
case, use a good antenna extension cable to extend the antenna to the outside;
The antenna must not be installed inside the metal case, which will cause the transmission distance to be
greatly weakened.
11. FAQ
11.1 Communication range is too short
The communication distance will be affected when obstacle exists.
Data lose rate will be affected by temperature, humidity and co-channel interference.
The ground will absorb and reflect wireless radio wave, so the performance will be poor when testing near ground.
Sea water has great ability in absorbing wireless radio wave, so performance will be poor when testing near the sea.
The signal will be affected when the antenna is near metal object or put in a metal case.
Power register was set incorrectly, air data rate is set as too high (the higher the air data rate, the shorter the distance).
The power supply low voltage under room temperature is lower than 2.5V, the lower the voltage, the lower the
transmitting power.
Due to antenna quality or poor matching between antenna and module.
11.2 Module is easy to damage
Please check the power supply source, ensure it is 2.0V~3.6V, voltage higher than 3.6V will damage the module.
Chengdu Ebyte Electronic Technology Co., Ltd. E22-900T22S User manual
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Please check the stability of power source, the voltage cannot fluctuate too much.
Please make sure antistatic measure are taken when installing and using, high frequency devices have electrostatic
susceptibility.
Please ensure the humidity is within limited range, some parts are sensitive to humidity.
Please avoid using modules under too high or too low temperature.
11.3 BER(Bit Error Rate) is high
There are co-channel signal interference nearby, please be away from interference sources or modify
frequency and channel to avoid interference;
Poor power supply may cause messy code. Make sure that the power supply is reliable.
The extension line and feeder quality are poor or too long, so the bit error rate is high;
12. Production guidance
12.1 Reflow soldering temperature
Profile Feature
Curve characteristics
Sn-Pb Assembly
Pb-Free Assembly
Solder Paste
Solder paste
Sn63/Pb37
Sn96.5/Ag3/Cu0.5
Preheat Temperature min （Tsmin）
Min preheating temp.
100℃
150℃
Preheat temperature max (Tsmax)
Mx preheating temp.
150℃
200℃
Preheat Time (Tsmin to Tsmax)(ts)
Preheating time
60-120 sec
60-120 sec
Average ramp-up rate(Tsmax to Tp)
Average ramp-up rate
3℃/second max
3℃/second max
Liquidous Temperature (TL)
Liquid phase temp.
183℃
217℃
Time（tL）Maintained Above（TL）
Time below liquid phase line
60-90 sec
30-90 sec
Peak temperature（Tp）
Peak temp.
220-235℃
230-250℃
Aveage ramp-down rate（Tp to Tsmax）
Aveage ramp-down rate
6℃/second max
6℃/second max
Time 25℃ to peak temperature
Time to peak temperature for
25℃
max 6 minutes
max 8 minutes
Chengdu Ebyte Electronic Technology Co., Ltd. E22-900T22S User manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co.,Ltd.
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12.2 Reflow soldering curve
13. E22 series
Model No.
Core IC
Frequency
Hz
Tx power
dBm
Distance
km
Package
Size
mm
Antenna
E22-900T22S
SX1262
915M 22.62
5
SMD
16*26
IPEX/Stamp hole
E22-230T22S
SX1262
230M
22
5
SMD
16*26
IPEX/Stamp hole
E22-400T22S
SX1268
430M 470M
22
5
SMD
16*26
IPEX/Stamp hole
E22-400M30S
SX1268
433M 470M
30
12
SMD
24*38.5
IPEX/Stamp hole
E22-900M30S
SX1262
868M 915M
30
12
SMD
24*38.5
IPEX/Stamp hole
E22-900M22S
SX1262
868M 915M
22
6.5
SMD
14*20
IPEX/Stamp hole
E22-400M22S
SX1268
433M 470M
22
6.5
SMD
14*20
IPEX/Stamp hole
Chengdu Ebyte Electronic Technology Co., Ltd. E22-900T22S User manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co.,Ltd.
23
14. Antenna recommendation
The antenna is an important role in the communication process. A good antenna can largely improve the
communication system.
15. Package for batch order
Chengdu Ebyte Electronic Technology Co., Ltd. E22-900T22S User manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co.,Ltd.
24
Revision history
Version
Date
Description
Issued by
1.00
2018-01-08
Initial version
huaa
1.10
2018-04-16
Content updated
huaa
1.20
2018-05-24
Content updated
Huaa
1.21
2018-07-20
Model name revised
Huaa
1.30
2018-10-23
Model No. split
Huaa
About us
Technical support: support@cdebyte.com
Documents and RF Setting download link: www.ebyte.com
Thank you for using Ebyte products! Please contact us with any questions or suggestions: info@cdebyte.com
------------------------------------------------------------------------------------------------------------
Fax: 028-64146160 ext. 821
Web: www.ebyte.com
Address: Innovation Center D347, 4# XI-XIN Road,Chengdu, Sichuan, China
FCC Statement
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
Any Changes or modifications not expressly approved by the party responsible for compliance could void
the user's authority to operate the equipment.
FCC Radiation Exposure Statement
This modular complies with FCC RF radiation exposure limits set forth for an uncontrolled environment.
This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
This modular must be installed and operated with a minimum distance of 20 cm between the radiator and user body.
If the FCC identification number is not visible when the module is installed inside another device, then the
outside of the device into which the module is installed must also display a label referring to the enclosed
module. This exterior label can use wording such as the following: “Contains Transmitter Module FCC
ID: 2ALPH-E22900T22S Or Contains FCC ID: 2ALPH-E22900T22S ”
When the module is installed inside another device, the user manual of the host must contain below
warning statements;
1. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference.
(2) This device must accept any interference received, including interference that may cause undesired
operation.
2. Changes or modifications not expressly approved by the party responsible for compliance could void the
user's authority to operate the equipment.
The devices must be installed and used in strict accordance with the manufacturer's instructions as
described in the user documentation that comes with the product.
IP EX antenna port dont connect to all circuit and permanent disable function in device with FCC ID:
2ALPH-E22900T22S