T-SIM7670G-S3 get it now

Overview

LILYGO T-SIM7670G-S3 combines the ESP32-S3 dual-core LX7 microcontroller with the SIMCom SIM7670G LTE Cat-1 cellular module and integrated GNSS. The SIM7670G delivers LTE Cat-1 data rates (10 Mbps downlink / 5 Mbps uplink) with global multi-band coverage, voice call support, and an integrated GPS/GLONASS/BeiDou receiver. The ESP32-S3 (16 MB Flash, 8 MB PSRAM) provides Wi-Fi 802.11 b/g/n and Bluetooth 5.0 LE alongside the cellular connection. Features a Nano SIM card slot, USB-C for programming, a 3.7 V Li-Po battery connector with charging, and IPEX antenna connectors for LTE and GPS. Part of the LilyGo-Modem-Series ecosystem.

Quick Start

Example Support

Example	PlatformIO/Arduino	ESP-IDF	Description
LilyGo-Modem-Series	✓		LTE Cat-1, MQTT, HTTP, GPS, SMS examples

PlatformIO

1. Install Visual Studio Code and Python
2. Search for and install the PlatformIO IDE extension in VS Code
3. Open the LilyGo-Modem-Series project folder
4. Open platformio.ini, select the T-SIM7670G-S3 environment
5. Click ✓ to compile, connect via USB-C, click → to upload

Arduino

1. Install Arduino IDE
2. Install Arduino ESP32
3. In Tools → Board, configure:

Arduino IDE Setting	Value
Board	ESP32S3 Dev Module
Port	Your port
USB CDC On Boot	Enable
CPU Frequency	240 MHz (WiFi)
Flash Size	16MB (128Mb)
Partition Scheme	16M Flash (3MB APP/9.9MB FATFS)
PSRAM	OPI PSRAM
Upload Mode	UART0/Hardware CDC
Upload Speed	921600
USB Mode	CDC and JTAG

4. Click Upload

Development Platforms

1. Arduino IDE
2. PlatformIO
3. ESP-IDF

Related Videos

Key Features

• ESP32-S3 dual-core LX7 @ 240 MHz, Wi-Fi + Bluetooth 5.0
• SIMCom SIM7670G: LTE Cat-1 (10 Mbps DL / 5 Mbps UL), global multi-band
• Voice call support via SIM7670G
• Integrated GNSS: GPS, GLONASS, BeiDou
• Nano SIM card slot
• USB-C for programming and power
• 3.7 V Li-Po battery connector with charging
• IPEX connectors for LTE and GPS antennas
• 16 MB Flash, 8 MB PSRAM

Specifications

Parameter	Value
SOC	ESP32-S3, Dual-core LX7 @ 240 MHz
Flash	16 MB
PSRAM	8 MB
Wireless	Wi-Fi 802.11 b/g/n, Bluetooth 5.0
Cellular	SIM7670G — LTE Cat-1, global multi-band
Voice	Supported (SIM7670G)
GNSS	GPS, GLONASS, BeiDou
SIM	Nano SIM
USB	1 × USB-C
Battery	3.7 V Li-Po connector with charging
Antenna	LTE IPEX + GPS IPEX

Pin Diagram

SIM7670G UART

Signal	GPIO
UART TX (to SIM7670G)	17
UART RX (from SIM7670G)	18
PWR KEY	9
DTR	10

Dimensions

Schematic

• LilyGo-Modem-Series GitHub Repository (hardware)

Datasheet

• ESP32-S3 Datasheet
• SIM7670G Hardware Design

Software Libraries

• LilyGo-Modem-Series GitHub Repository

Dependent Libraries

• TinyGSM
• TinyGPSPlus
• PubSubClient
• ArduinoHttpClient

FAQ

• Q. What is the difference between SIM7670G and SIM7000G? A. SIM7670G is an LTE Cat-1 module with higher data rates (up to 10 Mbps DL) and voice call support. SIM7000G is an NB-IoT/LTE Cat-M module designed for low-power, low-data applications. Choose SIM7670G for applications requiring higher throughput or voice.

• Q. Does T-SIM7670G-S3 support voice calls? A. Yes. The SIM7670G supports voice calls. An audio codec and speaker/microphone hardware would need to be connected to the module's audio pins for a complete voice solution.

• Q. How do I power on the SIM7670G? A. Pull GPIO9 (PWR KEY) LOW for at least 1 second, then release. Wait for the module to boot (typically 5–10 seconds) before sending AT commands.

Changelog

Version	Date	Notes
V1.0		Initial release