# LILYGO T-SIM7670G S3

> ESP32-S3-based development board with SIM7670G LTE Cat-1 modem, integrated GPS, Wi-Fi, Bluetooth 5, MicroSD, solar charging input, and 16 MB flash for high-performance IoT and asset tracking applications.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32-S3
- **Price:** ~$36.77
- **Product Readiness:** developer
- **CPU:** ESP32-S3-WROOM-1
- **CPU Architecture:** Xtensa LX7 dual-core
- **RAM:** 512KB SRAM
- **PSRAM:** 8MB OPI
- **Flash:** 16MB
- **USB:** USB-C (native USB CDC)
- **Power:** 5V
- **Operating Voltage:** 3.3V
- **Battery:** LiPo (user-supplied, 1.25mm JST)
- **Charging Port:** USB-C
- **Antenna:** U.FL/IPEX
- **SD Card:** microSD

## Connectivity

- **Wifi:** 802.11 b/g/n
- **Bluetooth:** BLE 5.0
- **Cellular:** 4G LTE Cat-1

## Open Source

- **Status:** open-firmware
- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Compatible Firmware

arduino, esp-idf

## Use Cases

- asset-tracking
- iot-gateway
- fleet-management
- remote-monitoring
- environmental-monitoring
- industrial-iot

## Components

- **ESP32-S3-WROOM-1** (mcu): Dual-core 240 MHz Xtensa LX7 MCU with 16 MB flash, 8 MB OPI PSRAM, native USB CDC, Wi-Fi 802.11 b/g/n, and Bluetooth 5 LE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-sim-7670g-s3&source=md-export)
- **SIM7670G** (cellular-modem): SIMCOM SIM7670G LTE Cat-1 modem with integrated multi-constellation GNSS (GPS/GLONASS/BeiDou/Galileo) supporting global frequency bands. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsimcom.ee%2Fdocuments%2FSIM7670G%2FSIM7670G_Hardware_Design_V1.03.pdf&ref=openhardware.directory&product=lilygo-t-sim-7670g-s3&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **SDIO**
- **USB CDC**

## Available Software

- **[Arduino IDE]()** (open-source)
- **[ESP-IDF]()** (open-source)

## Description

## Overview

The LILYGO T-SIM7670G S3 is an advanced cellular IoT development board built around the ESP32-S3-WROOM-1 module featuring 16 MB flash and 8 MB OPI PSRAM. It pairs with the SIM7670G LTE Cat-1 modem to deliver reliable cellular connectivity with integrated GPS/GNSS positioning. The board includes a MicroSD card slot, solar charging input (5–6V), USB-C programming port (500 mA max charge), onboard battery management, and a dedicated board LED. The ESP32-S3 provides USB CDC on boot capability, eliminating the need for a separate USB bridge chip. All standard interfaces—I2C, SPI, UART, and SDIO—are accessible through the GPIO headers for peripheral expansion.

## Where to Buy

- [LILYGO Official Store](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-sim-7670g-s3&ref=openhardware.directory&product=lilygo-t-sim-7670g-s3&source=md-export) — $36.77

## Resources

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-sim-7670g-s3&ref=openhardware.directory&product=lilygo-t-sim-7670g-s3&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-Modem-Series&ref=openhardware.directory&product=lilygo-t-sim-7670g-s3&source=md-export)

## Tags

`esp32-s3`, `4g`, `lte`, `sim7670g`, `cellular`, `gps`, `iot`, `lilygo`, `solar`, `s3`

## Images

![LILYGO T-SIM7670G S3](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-sim-7670g-s3/61e4fba809c4.jpg)
![LILYGO T-SIM7670G S3](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-sim-7670g-s3/d593d7de10c4.jpg)
![LILYGO T-SIM7670G S3](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-sim-7670g-s3/6a128bd6c826.jpg)
![LILYGO T-SIM7670G S3](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-sim-7670g-s3/c599368a146d.jpg)
![LILYGO T-SIM7670G S3](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-sim-7670g-s3/38a50fdbfaa6.jpg)
![LILYGO T-SIM7670G S3](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-sim-7670g-s3/aa15f39401df.png)

> **Battery Powered:** Li-Po

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