LilyGo T-Relay 6-Channel Relay Board with ESP32-S3

This relay board combines six independent switching channels with the powerful ESP32-S3 microcontroller for versatile control tasks in IoT projects. Two 10-pin expansion headers enable the connection of additional modules and facilitate integration into existing systems. Thanks to integrated Wi-Fi and Bluetooth LE features, the board can be configured and monitored wirelessly. The reset and boot buttons simplify firmware updates and system resets. A JST-SH socket (1.0 mm) is compatible with Qwiic/STEMMA-QT sensors and extends the range of applications. Power is supplied via a DC input of 7 to 24 V, allowing the board to be used in both low-voltage and 24 V applications. The optically protected relays increase isolation between control and load circuits. The robust layout is designed for industrial environments such as home automation, remote switching units, or automated test systems.

Recommended Accessories:

1x CR1220 Button Cell Lithium Battery 3V

Features:

Six opto-isolated relays control loads up to medium power.
ESP32-S3 module enables Wi-Fi 4 and Bluetooth 5 LE communication.
16 MB flash memory and 8 MB PSRAM provide ample space for complex programs.
Two 10-pin expansion headers simplify the connection of additional modules.
Reset and boot buttons simplify firmware updates and system restart.
Input voltage of 7 to 24 V DC allows flexible power supply options.
JST-SH 1.0 mm port is compatible with Qwiic/STEMMA-QT sensors.
Logic voltage of 3 V is suitable for sensitive sensors and actuators.

Application Examples:

In the smart home sector, the board controls lighting, fans, or heating systems.
In industrial plants, pumps and valves can be switched via IoT connection.
For greenhouses, it automates irrigation and ventilation via relays.
As a switch matrix in test environments, it allows the remote switching of measurement lines.
In prototyping, the relays serve to control motors or power supplies via WLAN.

Documentation:

Github LilyGO T-Relay S3

Technical Data:

Manufacturer: LILYGO
Manufacturer SKU: H629
Microcontroller: ESP32-S3-WROOM-1U (Xtensa LX7 Dual-Core, 240 MHz)
Flash Memory: 16 MB
PSRAM: 8 MB
Relays: 6 channels, opto-isolated
Wireless Connections: Wi-Fi 802.11 b/g/n, Bluetooth LE 5
Input Voltage: 7 – 24 V DC
Connections: 2 × 10-pin expansion headers, JST-SH 1.0 mm 4-pin for Qwiic/STEMMA-QT
Buttons: Reset and Boot
Logic Voltage: 3 V
GPIO Pins: 19
Dimensions: 145 × 90 × 40 mm
Weight: 294 g