A9G Pudding/SMS/Voice/Wireless Data Transmission + GPRS/GSM/GPS Positioning IOT Development Board

Features

• Supports voice call and SMS message.
• Supports GSM/ GPRS frequency: 850/ 900/ 1800/ 1900 MHz.
• Supports GPRS data service, the maximum download data rate is 85.6 Kbps, upload data is 42.8 Kbps.
• Supports GSM07.07, 07. 05 AT commands and Ai-Thinker explosion command.
• Supports 3 serial ports, one download serial port, one AT command port.

Specifications

• Size: 19.2mm x 18.8mm x 3mm
• Working temperature: -30 ℃-80℃
• Working voltage: 3.5v – 4.2v (it’s best to power by 4v)
• Power voltage: >3.5v
• Low power consumption:
• Sensitivity:
• GPIO level: 2.8v

Connection

• Connect usb-ttl with 4 wires when debugging, VUSB-5V; GND-GND; AT_TX-RX; AT_RX-TX
• Or power supply by USB, then connect another three lines, GND-GND; AT_TX-RX; AT_RX-TX
• Or power by lithium battery, VBAT-(3.3v-4.2) V; GND-GND; AT_TX-RX; AT_RX-TX; (VBAT power supply, need to press power_key button for about 2s)

Power on

• A9G development board can be powered by USB or lithium battery.
• It does not require any operation when powered 1-2s.
• Please press the Rst_Key button to reset.
• The module enters AT command mode by default.

Package list

• A9G Development Board x 1
• GPRS Antenna x 1
• GPS Antenna x 1

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