Ai Thinker Technology ESP12S WIFI MODULE User Manual ESP 12S revised

Shenzhen Ai-Thinker Technology co., LTD WIFI MODULE ESP 12S revised

Contents

ESP-12S User Manual-revised

ESP-12S User Manual REV:1.0 2016.7
ESP-12S User Manual Shenzhen Ai-Thinker Technology Co., Ltd http://www.ai-thinker.com 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. (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. Please notice that 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 FCC ID: 2AHMR-ESP12S” any similar wording that expresses the same meaning may be used. This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment.This equipment should be installed and operated with a minimum distance of 20cmbetween the radiator & your body. This transmitter must not be co-located or operating inconjunction with any other antenna or transmitter. CE Mark Warning The module is limited to OEM installation ONLY. The OEM integrator is responsible for ensuring that the end-user has no manual instruction to remove or install module. The module is limited to installation in mobile application; A separate approval is required for all other operating configurations, including portable configurations with respect to Part 2.1093 and difference antenna configurations. There is requirement that the grantee provide guidance to the host manufacturer for compliance with Part 15B requirements.
ESP-12S User Manual Shenzhen Ai-Thinker Technology Co., Ltd http://www.ai-thinker.com 1 Table Of Contents 1. Preambles ............................................................................................................................................................... 2 1.1. Features ............................................................................................................................................... 3 1.2. Parameters ........................................................................................................................................... 4 2. Pin Descriptions ...................................................................................................................................................... 5 2.1. Interfaces ............................................................................................................................................. 6 2.2. Pin Mode .............................................................................................................................................. 8 2.3. Antenna interface ................................................................................................................................ 8 3. Package information and OEM installation method ............................................................................................. 9 3.1. Package information .......................................................................................................................... 10 3.2. OEM installation mathod ................................................................................................................... 10 4. Absolute Maximum Ratings ................................................................................................................................ 11 4.1Recommended Operating Conditions ......................................................................................................... 11 4.2.AT commend Testing ................................................................................................................................... 11 4.3.AT commend ............................................................................................................................................... 12 4.3.1.AT Command Description ........................................................................................................................ 12 4.3.2.Basic AT Command Set ............................................................................................................................ 12
ESP-12S User Manual Shenzhen Ai-Thinker Technology Co., Ltd http://www.ai-thinker.com 2 1. Preambles ESP-12S WiFi module is developed by AI-Thinker Co.,Ltd, core processor ESP8266 in smaller sizes of the module encapsulates Tensilica L106 integrates industry-leading ultra low power 32-bit MCU micro, with the 16-bit short mode, clock speed support 80 MHz, 160 MHz, supports the RTOS, integrated Wi-Fi MAC/BB/RF/PA/LNA, on-board antennas. The module supports standard IEEE802.11 b/g/n agreement, complete TCP/IP protocol stack. Users can use the add modules to an existing device networking, or building a separate network controller. ESP8266 is high integration wireless SOCs, designed for space and power constrained mobile platform designers. It provides unsurpassed ability to embed Wi-Fi capabilities within other systems, or to function as a standalone application, with the lowest cost, and minimal space requirement. Figure 1 ESP8266EX Functional Block Diagram ESP8266EX offers a complete and self-contained Wi-Fi networking solution; it can be used to host the application or to offload Wi-Fi networking functions from another application processor. When ESP8266EX hosts the application, it boots up directly from an external flash. In has integrated cache to improve the performance of the system in such applications. Alternately, serving as a Wi-Fi adapter, wireless internet access can be added to any micro controllerbased design with simple connectivity (SPI/SDIO or I2C/UART interface). ESP8266EX is among the most integrated WiFi chip in the industry; it integrates the antenna switches, RF balun, power amplifier, low noise receive amplifier, filters, power management modules, it requires minimal external circuitry, and the entire solution, including front-end module, is designed to occupy minimal PCB area. ESP8266EX also integrates an enhanced version of Tensilica’s L106 Diamond series 32-bit processor, with on-chip SRAM, besides the Wi-Fi functionalities. ESP8266EX is often integrated with external sensors and other application specific devices through its GPIOs; codes for such applications are provided in examples in the SDK.
ESP-12S User Manual Shenzhen Ai-Thinker Technology Co., Ltd http://www.ai-thinker.com 3 1.1. Features • 802.11 b/g/n • Integrated low power 32-bit MCU • Integrated 10-bit ADC • Integrated TCP/IP protocol stack • Integrated TR switch, balun, LNA, power amplifier and matching network • Integrated PLL, regulators, and power management units • Supports antenna diversity • Wi-Fi 2.4 GHz, support WPA/WPA2 • Support STA/AP/STA+AP operation modes • Support Smart Link Function for both Android and iOS devices • SDIO 2.0, (H) SPI, UART, I2C, I2S, IRDA, PWM, GPIO • STBC, 1x1 MIMO, 2x1 MIMO • A-MPDU & A-MSDU aggregation and 0.4s guard interval • Deep sleep power <10uA, Power down leakage current < 5uA • Wake up and transmit packets in < 2ms • Standby power consumption of < 1.0mW (DTIM3) • +20dBm output power in 802.11b mode • Operating temperature range -40C ~ 85C
ESP-12S User Manual Shenzhen Ai-Thinker Technology Co., Ltd http://www.ai-thinker.com 4 1.2. Parameters Table 1 below describes the major parameters. Table 1 Parameters Categories Items Values WiFi Paramters WiFi Protocles 802.11 b/g/n Frequency Range 2.4GHz-2.5GHz (2400M-2483.5M) Hardware Paramaters Peripheral Bus UART/HSPI/I2C/I2S/Ir Remote Contorl GPIO/PWM Operating Voltage 3.3V Operating Current Average value: 80mA Operating Temperature Range -40°~125° Ambient Temperature Range Normal temperature Package Size 18mm*20mm*3mm External Interface N/A Software Parameters Wi-Fi mode station/softAP/SoftAP+station Security WPA/WPA2 Encryption WEP/TKIP/AES Firmware Upgrade UART Download / OTA (via network) / download and write firmware via host Ssoftware Development Supports Cloud Server Development / SDK for custom firmware development Network Protocols IPv4, TCP/UDP/HTTP/FTP User Configuration AT Instruction Set, Cloud Server, Android/iOS APP
ESP-12S User Manual Shenzhen Ai-Thinker Technology Co., Ltd http://www.ai-thinker.com 5 2. Pin Descriptions There are altogether 16 pin counts, the definitions of which are described in Table 2 below. Figure 2 ESP-12S pinout Table 2 ESP-12S pin description Pin number Pin name function 1 RST Reset module 2 ADC A/d conversion result. Input voltage range 0~1V, value range: 0~1024 3 EN Chip enable pin. Active high 4 GPIO16 GPIO16; can be used to wake up the chipset from deep sleep mode 5 GPIO14 GPIO14; HSPI_CLK 6 GPIO12 GPIO12; HSPI_MISO 7 GPIO13 GPIO13; HSPI_MOSI; UART0_CTS 8 VCC 3.3V power supply (VDD)
ESP-12S User Manual Shenzhen Ai-Thinker Technology Co., Ltd http://www.ai-thinker.com 6 9 GND GND 10 GPIO15 GPIO15; MTDO; HSPICS; UART0_RTS 11 GPIO2 GPIO2; UART1_TXD 12 GPIO0 GPIO0 13 GPIO4 GPIO4 14 GPIO5 GPIO5 15 RXD0 UART0_RXD; GPIO3 16 TXD0 UART0_TXD; GPIO1 2.1. Interfaces Table 3 Descriptions of Interfaces Interface Pin Name Description HSPI IO12(MISO), IO13(MOSI) IO14(CLK), IO15(CS) SPI Flash , display screen, and MCU can be connected using HSPI interface PWM IO12(R), IO15(G), IO13(B) Currently the PWM interface has four channels, but users can extend the channels according to their own needs. PWM interface can be used to control LED lights, buzzers, relays, electronic machines, and so on. IR Remote Control IO14(IR_T), IO5(IR_R) The functionality of Infrared remote control interface can be implemented via software programming. NEC coding, modulation, and demodulation are used by this interface. The frequency of modulated carrier signal is 38KHz. ADC TOUT ESP8266EX integrates a 10-bit analog ADC. It can be used to test the power supply voltage of VDD3P3 (Pin3 and Pin4) and the input power voltage of TOUT (Pin 6). However, these two functions cannot be used simultaneously. This interface is typically used in sensor
ESP-12S User Manual Shenzhen Ai-Thinker Technology Co., Ltd http://www.ai-thinker.com 7 products. I2C IO14(SCL), IO2(SDA) I2C interface can be used to connect external sensor products and display screens, etc. UART UART0: TXD(U0TXD), RXD(U0RXD), IO15(RTS), IO13(CTS) UART1: IO2(TXD) Devices with UART interfaces can be connected with the module. Downloading: U0TXD+U0RXD or GPIO2+U0RXD Communicating: UART0: U0TXD, U0RXD, MTDO (U0RTS), MTCK (U0CTS) Debugging: UART1_TXD (GPIO2) can be used to print debugging information. By default, UART0 will output some printed information when the device is powered on and is booting up. If this issue exerts influence on some specific applications, users can exchange the inner pins of UART when initializing, that is to say, exchange U0TXD, U0RXD with U0RTS, U0CTS. I2S I2S Input： IO12 (I2SI_DATA) ; IO13 (I2SI_BCK ); IO14 (I2SI_WS); I2S interface is mainly used for collecting, processing, and transmission of audio data. I2S Output:： IO15 (I2SO_BCK ); IO3 (I2SO_DATA); IO2 (I2SO_WS ).
ESP-12S User Manual Shenzhen Ai-Thinker Technology Co., Ltd http://www.ai-thinker.com 8 2.2. Pin Mode Table 4 Pin Mode Mode GPIO15 GPIO0 GPIO2 UART low low high Flash Boot low high high 2.3. Antenna interface ESP-12S Modules through the IPEX interface to connect to external antenna. The antenna must be in line with the 802.11g/802.11b IEEE standard, and the antenna parameters are shown in the following table： Table 5 Antenna parameters Rating Value Frequency range 2.4~2.4825GHz Impedance 50Ω
ESP-12S User Manual Shenzhen Ai-Thinker Technology Co., Ltd http://www.ai-thinker.com 9 3. Package information and OEM installation method The external size of theESP-12S WiFi module is 16mm*17mm*3mm, as is illustrated in Figure 4 below: Figure 3 Top View of ESP-07s WiFi Module Figure 4 Dimensions of ESP-12S WiFi Module Table 5 Dimensions of ESP-12S WiFi Module Length width Height PAD Size(Bottom) Pin Pitch 16mm 17mm 3 mm 1 mm x 1.2 mm 2mm
ESP-12S User Manual Shenzhen Ai-Thinker Technology Co., Ltd http://www.ai-thinker.com 10 3.1. Package information ESP-12S use a half hole patch package, Module PCB Footprint shown in the following figure: Figure 5 Module PCB Footprint 3.2. OEM installation mathod Using ESP-12S module Please reference in front of the package information in the Layout on the main board for OEM factory .Please pay more attention Module's direction and the antenna close to the edge of board is better ,the Components and layout should not be on the bottom of antenna then soldering the module.when the module be soldering can not in the environment of high temperature ,We recommend the reflow soldering temperature curves is shown in figure 6: Figure 6 Recommend reflow soldering temperature curves
ESP-12S User Manual Shenzhen Ai-Thinker Technology Co., Ltd http://www.ai-thinker.com 11 4. Absolute Maximum Ratings Table 6 Absolute Maximum Ratings Rating Condition Value Unit Storage Temperature -40 to 125 ℃ Maximum Soldering Temperature 260 ℃ Supply Voltage IPC/JEDEC J-STD-020 +3.0 to +3.6 V 4.1Recommended Operating Conditions Table 7 Recommended Operating Conditions Operating Condition Symbol Min Typ Max Unit Operating Temperature -40 20 125 ℃ Supply voltage VDD 3.0 3.3 3.6 V 4.2.AT commend Testing 1.Hardware connection As shown in Figure 7, ESP-12S via a USB to TTL Tool connected to the computer, software tool through the serial port on the computer can be AT instruction test Figure 7 ESP-12S connect with computer
ESP-12S User Manual Shenzhen Ai-Thinker Technology Co., Ltd http://www.ai-thinker.com 12 4.3.AT commend Espressif AT instruction set functions and methods of use AT commands set is divided into: Basic AT commands, WiFi related AT commands, TCP / IP AT 4.3.1.AT Command Description Table 8 Each Command set contains four types of AT commands. Notes: 1. Not all AT Command has four commands. 2. [] = default value, not required or may not appear 3. String values require double quotation marks, for example: AT+CWSAP="ESP756290","21030826",1,4 4. Baudrate = 115200 5. AT Commands has to be capitalized, and end with "/r/n" 4.3.2.Basic AT Command Set The ESP8266 wireless WiFi modules can be driven via the serial interface using the standard AT commands. Here is a list of some basic AT commands that can be used.
ESP-12S User Manual Shenzhen Ai-Thinker Technology Co., Ltd http://www.ai-thinker.com 13 Table9 basic AT commands AT – Test AT startup The type of this command is "executed". It's used to test the setup function of your wireless WiFi module.
ESP-12S User Manual Shenzhen Ai-Thinker Technology Co., Ltd http://www.ai-thinker.com 14 AT+RST – Restart module The type of this command is "executed". It’s used to restart the module. AT+GMR – View version info This AT command is used to check the version of AT commands and SDK that you are using, the type of which is "executed". AT+GSLP – Enter deep-sleep mode This command is used to invoke the deep-sleep mode of the module, the type of which is "set". A minor adjustment has to be made before the module enter this deep sleep mode, i.e., connect XPD_DCDC with EXT_RSTB via 0R.
ESP-12S User Manual Shenzhen Ai-Thinker Technology Co., Ltd http://www.ai-thinker.com 15 ATE – AT commands echo This command ATE is an AT trigger command echo. It means that entered commands can be echoed back to the sender when ATE command is used. Two parameters are possible. The command returns "OK" in normal cases and "ERROR" when a parameter other than 0 or 1 was specified. AT+RESTORE – Factory reset This command is used to reset all parameters saved in flash (according to appendix), restore the factory default settings of the module. The chip will be restarted when this command is executed. Detailed instruction test, please refer to the Esp8266 AT Instruction Set, can be downloaded to shun official website。

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