A9G GSM/GPRS+GPS/BDS [Module, Dev. Board] - Mini Development Board

Development board package contents

• Main development board (accelerator IC is not mounted on the board).
• GPS/GPRS antenna and GPS/BDS antenna.

Quick Start Guide

• The development board uses AT firmware. For debugging via a 4-wire USB-TTL connection to a computer: VUSB → 5V; GND → GND; AT_TX → RX; AT_RX → TX;
• Or use USB power, then connect the remaining three wires: GND → GND; AT_TX → RX; AT_RX → TX;
• Or use a lithium battery: VBAT → (3.3V-4.2V); GND → GND; AT_TX → RX; AT_RX → TX; (For VBAT power, press the power_key button for about 2s).

• The A9G development board can be powered by a lithium battery or USB.
• 1 to 2 seconds after power-on, the module starts automatically and the serial port outputs information. No further operation is required for the board to function correctly.
• To reset, press the Rst_Key button.
• The module enters AT command mode by default.

• Under normal conditions, the flag indicating power-on initialization completion is + CIEV: READY. During initialization, the module requests data from the base station (date, time zone, etc.). Due to network latency, READY may appear after this data. The appearance of READY signifies that initialization is complete.

• The A9G features a baud rate adaptive function. The default baud rate is 115200. Upon initial power-on, you can modify the module's baud rate. For example, if your MCU baud rate is 9600, simply send the AT command (or any command) immediately after power-up; the module will automatically adjust its baud rate to 9600.