A9 development board schematic diagram: a9-dev_v1.2.pdf (Note: A9 development board has no GPS part.)

A9 development board principle library: a9-dev_v1.2.zip

For other basic information, please refer to the DDCS/GPRS page: https://docs.ai-thinker.com/gprs

l The A9 development board is a multifunctional development board based on Anxinke A9G GPRS/GSM module, which can be used to verify the basic communication functions and peripheral functions of the A9 module.

l The A9 development board has basic telephone/message and GPRS network communication.

l The A9 development board is equipped with lithium battery charging management, microphone, speaker interface, USB communication interface, multiple user buttons/leds, TF card slot, acceleration sensor, SPI interface, I2C2 interface, and ADC interface.

l A slot machine expansion board on the A9 development board, which can be connected to a traditional slot machine.

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Physical map

size

The development board uses AT firmware. When debugging, use 4 wires to connect usb-ttl and connect to the computer for debugging: VUSB→5V; GND→GND; AT_TX→RX; AT_RX→TX;

Or use USB for power supply, and connect three more lines GND→GND; AT_TX→RX; AT_RX→TX;

Or lithium battery power supply VBAT→(3.3v-4.2)V; GND→GND; AT_TX→RX; AT_RX→TX; (To use VBAT power supply, you need to press the power_key button for about 2s)

    The A9 development board can be powered by lithium batteries or USB.

    The module will run automatically after power-on for 1~2S, and the serial port will automatically output information at this time. The entire process from power-on to normal operation of the development board does not require any operation.

    To reset, please press the Rst_Key button.

    The module enters AT command mode by default.

Power-on print output information

Preparation for burning firmware:

GPRS series module firmware release: http://wiki.ai-thinker.com/gprs/firmware

Burning software download and burning tutorial: http://wiki.ai-thinker.com/gprs_download

A6/A9/A9G AT command operation examples (online documentation, will continue to update and debug DEMO) Please check AT command set for other usage

CSDK_Github open source information: https://github.com/Ai-Thinker-Open/GPRS_C_SDK

(Among A9Tracker related functions, the A9 module uses the base station positioning function, and the A9G module can choose to set the base station positioning function or the GPS positioning function, and upload the current position information to WeChat or app regularly. When positioning indoors, due to GPS signals Too weak, it is recommended to set the base station positioning function. For details, please refer to the following documents)

• WeChat: Anxinke Official Account Usage Guide

• app: A9Tracker app user guide

• A9/A9G 10-minute docking with Gizwits to create your own product tutorial: http://www.jianshu.com/p/e3d86a263be5

Note: The above functions are not available for the prototype (not purchased by Taobao) that Anxin can first send to customers. Customers can send the IMEI value of the module to sales. Our company solves this problem remotely

Under normal circumstances, the sign of the module power-on initialization is +CIEV: READY. The actual module requests data from the base station when it is initialized, and will issue the date, zero time zone time and time zone information. Due to network reasons, it will be in READY Output afterwards. Of course, after READY appears, it means that the module is powered on and initialized.

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A9 has a baud rate adaptive function, the default baud rate is 115200. In the initial process of module power-on, the baud rate of the module can be modified. For example, the baud rate of my MCU is 9600, then when the module is just powered on, send a command AT (not only limited to this command, only used to adjust the baud rate), the module will automatically adjust the wave Special rate to 9600.

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