Wifi Module (esp11)
User Manual: wifi module (esp11)
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ESP8266 WiFi Module
The ESP8266 Wifi module is a complete Wi-Fi
network where you can easily connect as a serving Wi-
Fi adapter, wireless internet access interface to any
microcontroller-based design on its simple connectivity
through Serial Communication or UART interface.
FEATURES:
802.11 b/g/n protocol
Wi-Fi Direct (P2P), soft-AP
Integrated TCP/IP protocol
GENERAL SPECIFICATIONS:
Input Supply: + 3.3VDC
IC: ESP8266
Interface: Serial Communication
PCB Dimensions: 21mm x 13.2mm
Major Parts presentation
Figure 1. Major Parts placement of Wifi Module & its major Components.
The WiFi module requires a 3.3V power supply
*Note: do not connect the wifi module to the 5V, the wifi module does not have a 5V tolerant inputs.
PIN NAME DESCRIPTIONS
VIN +3.3 V DC Input Supply
GPIO2 Other
GPIO0 Bootloader, for Firmware updates
TX Transmit
RX Received
RESET Reset pin
ENABLE Enable the Wifi (Active-HIGH)
GND Ground
Table 1. Pin Descriptions
Controller Operation & Menu Settings
Figure 2. WiFi module connected to a Gizduino microcontroller
To connect the Wifi module to the Gizduino microcontroller:
connect the red wire to VIN(3.3V) to the +3.3V power from the microcontroller.
connect the black wire to the ground.
connect the green wire to the TX of the Wifi module and microcontroller
connect the yellow wite to the RX of the wifi module and microcontroller
FOR BOOTLOADING:
1. Use a PL2303 driver or FDTI driver.
2. Wiring connections:
UART to ESP module
RX to TX
TX to RX
GND to GND
3.3V to 3.3V or use AMS2950 IC
3. Dont forget to put a GND to GPIO0-bootloader.
Before you start to download the firmware.
AT Commands
Commands Description Type
AT+RST restart the module basic
AT+CWMODE wifi mode wifi
AT+CWJAP join theAP wifi
AT+CWLAP list theAP wifi
AT+CWQAP quit theAP wifi
AT+CIPSTATUS get the connection TCP/IP
status
AT+CIPSTART set up TCP or TCP/IP
UDP connection
AT+CIPSEND send data TCP/IP
AT+CIPCLOSE close TCP or TCP/IP
AT+CIFSR Get IP address TCP/IP
AT+CIPMUX set multiple TCP/IP
connections
AT+CIPSERVER set as server TCP/IP
Table 2.ATCommands for ESP8266
AT+CWMODE
Inquiry:AT+CWMODE?
Test: AT+CWMODE=?
Parameters:
1 = Status, 2 =AP, 3 = both
AT+CWJAP
Inquiry:AT+CWJAP?
Set: AT+CWJAP = <ssid>,<pwd>
Parameters:
ssid = ssid, pwd = wifi password
AT+CWQAP
Test: AT+CWQAP=?
AT+CWSAP
Inquiry:AT+CWSAP?
Set:
AT+CWSAP = <ssid>,<pwd>,<chl>,<ecn>
Parameters:
ssid = ssid, chl = channel,
ecn = encryption
Examples:
Connect to your router:
AT+CWJAP = "YOUR SSID","helloword"
Check if connected:
AT+CWJAP?
AT+CIPSTATUS
Inquiry:AT+CWSTATUS?
Set:AT+CIPSTATUS
AT+CIPSTART
Test:AT+CIPSTART?
Set:
1. Single connection (+CIPMUX=0)
AT+CIPSTART=<type>,<addr>,<port>
2. Multiple connection (+CIPMUX=1)
AT+CIPSTART=<id>,<type>,<addr>,<port>
Parameters:
id = 0-4, type = TCP/UDP,
addr = IP address,
port = port
Examples:
Connect to another TCPserver, set multiple
connection first:
AT+CIPMUX = 1
connect:
AT+CIPSTART= 4,"TCP","X1.X2.X3.X4",9999
AT+CIPSEND
Test: AT+CIPSEND=?
Set:
1. Single connection (+CMMUX=0)
AT+CIPSEND=<length>
2. Multiple connection (+CIPMUX=1)
AT+CIPSEND=<id>,<length>
Examples:
send data:
AT+CIPSEND=4,15 and then enter the data
AT Commands & Examples
AT+CIPCLOSE
Test: AT+CIPCLOSE=?
Set: AT+CIPCLOSE=<id> orAT+CIPCLOSE
AT+CIFSR
Test: AT+CIFSR=?
Set: AT+CIFSR
AT+CIPMUX
Inquiry: AT+CIPMUX=?
Set: AT+CIPMUX=<mode>
Parameters:
0 for single connection
1 for multiple connection
AT+CIPSERVER
Set: AT+CIPSERVER=<mode>[,<port>]
Parameters:
mode 0 to close server mode
mode 1 to open
port = port
Examples:
Turn on as a TCPserver:
AT+CIPSERVER=1,8888
check the self server IP address:
AT+CIFSR=?
AT Commands & Examples
