LILYGO T-SIM A7670E - image 1
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LILYGO·ESP32

LILYGO T-SIM A7670E

ESP32-WROVER-E development board with A7670E LTE Cat-1 modem supporting voice calls, SMS, and GPS positioning. Available with multiple regional frequency variants for global 4G deployments.

Starting from

$29.98

Compatible Firmware

Specifications

PSRAM8MB
Flash4MB
GPIO Level3.3V
Power Input5V
ChargingUSB-C
BluetoothBLE 4.2
AntennaU.FL/IPEX
StoragemicroSD

Components

Main MCUMCUDatasheet

Dual-core 240 MHz Xtensa LX6 MCU with 4 MB flash and 8 MB PSRAM, integrated Wi-Fi 802.11 b/g/n and Bluetooth 4.2.

LTE Cat-1 ModemCellular ModemDatasheet

SIMCOM A7670E LTE Cat-1 modem supporting voice calls, SMS, and data over LTE-FDD B1/B3/B5/B7/B8/B20 and GSM 900/1800 MHz. Optional GNSS (GPS/GLONASS/BeiDou) positioning.

WCH CH9102 USB-to-TTL serial converter for USB programming and debugging.

Bus Interfaces

I2C
SPI
UART
SDIO
I2S
CAN

Overview

The LILYGO T-SIM A7670E is a compact cellular development board featuring the ESP32-WROVER-E module (4 MB flash, 8 MB PSRAM) paired with the SIMCOM A7670E LTE Cat-1 modem. It supports voice calls, SMS, and data connectivity across European LTE-FDD bands (B1/B3/B5/B7/B8/B20) and GSM 900/1800 MHz bands. Optional GPS variants add GNSS positioning via an integrated IPEX antenna connector. The board uses a CH9102 USB-to-serial bridge for programming, supports MicroSD storage, and includes a Nano SIM card slot and 18650 battery holder for portable operation.

Use Cases

6

Resources

Where to Buy

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