An all-in-one development board combining an ATmega32U4 microcontroller with an A9G GPRS/GSM/GPS module. Capable of making voice calls, sending SMS text messages, and providing GPS positioning — all controllable via AT commands over serial. The board includes analogue, I2C, and digital expansion interfaces for connecting additional sensors and modules.

The A9G module supports quad-band GSM (850/900/1800/1900 MHz) for worldwide 2G network compatibility, GPRS Class 10 data, and GPS positioning with less than 2.5m horizontal accuracy. A 3.5mm headphone jack is included for voice audio.

Key Features

• ATmega32U4 + A9G – Arduino-compatible MCU with integrated GSM/GPRS/GPS
• Voice, SMS, and Data – Make calls, send texts, and transfer data over GPRS
• GPS Positioning – Less than 2.5m horizontal accuracy
• Quad-Band GSM – 850/900/1800/1900 MHz for global 2G coverage
• 3.5mm Audio Jack – For voice calls with headset
• Low Standby Current – ~3mA or less in standby
• AT Command Control – Standard GSM 07.07/07.05 and Ai-Thinker extended commands

Specifications

• MCU – ATmega32U4
• Cellular Module – A9G
• Working Voltage – 3.3–5V
• GSM Bands – Quad-band 850/900/1800/1900 MHz
• GPRS Class – Class 10 (85.6 kbps down, 42.8 kbps up)
• GPS Accuracy – <2.5m horizontal
• Baud Rate – 115200 bps
• Standby Current – 1.2–1.3mA (DRX dependent)
• A9G Module Size – 19.2 × 18.8 × 3mm
• Operating Temperature – -30°C to +80°C
• Protocol Stack – PPP/TCP/UDP/HTTP/FTP/SMTP/MUX
• Speech Coding – HR, FR, EFR, AMR
• Certifications – RoHS, FCC, CE, CTA

Expansion Interfaces

• 1× Analogue input
• 1× I2C interface
• 2× Digital interfaces

Ideal For

• GPS tracker projects
• Remote monitoring and telemetry over 2G
• IoT devices requiring cellular connectivity
• SMS-based alert and notification systems

Package Contents

• 1× 32u4 with A9G GPRS/GSM/GPS Board

Resources

• User Manual and Wiki (Elecrow)