LILYGO T-SIM A7670E

Overview

The LILYGO T-SIM A7670E is an ESP32-based development board featuring the SIMCOM A7670 4G LTE CAT1 module for cellular connectivity. It is designed for IoT applications requiring reliable cellular communication including remote monitoring, asset tracking, and data uplink over 4G networks with voice and SMS capability.

Multiple SKU variants are available: T-A7670E R2 (Europe), T-A7670G (Global), and T-A7670SA (South Asia), each with or without integrated GPS. GPS variants include a dedicated GPS antenna and LTE antenna, while non-GPS variants include only the LTE antenna. The board requires an 18650 battery (not included) and a SIM card (not included). An onboard power cable (PH2.0mm) and pin headers are provided.

Firmware Compatibility

The T-SIM A7670E is compatible with Arduino IDE and ESP-IDF. The TinyGSM library can be used for cellular communication via AT commands, and the GitHub repository at LilyGO-T-A7670X provides board-specific examples for cellular data, SMS, GPS, and MQTT connectivity.

Flashing Guide

1. Clone https://github.com/Xinyuan-LilyGO/LilyGO-T-A7670X for examples and documentation.
2. Connect via USB and install ESP32 Arduino core.
3. Select "ESP32 Dev Module" in Arduino IDE.
4. Insert a compatible SIM card and connect LTE antenna before powering on.
5. Upload your sketch; use the TinyGSM library for AT command communication with the A7670 module.