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Main image of LILYGO TTGO T-Relay ESP32 Wireless Module DC 5V 4 Groups Relay Development Board 4MB Flash WiFi BLE Remote Switch Control (T-Relay T- U2T Kit)

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LILYGO TTGO T-Relay ESP32 Wireless Module DC 5V 4 Groups Relay Development Board 4MB Flash WiFi BLE Remote Switch Control (T-Relay T- U2T Kit)

Item #: 9SIVSWGM1H1672
Mfr. Part #: OB09XWWYK4V

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-4MB FLASH ,8MB PS RAM
-MCU: ESP32-Wrover-B
-WIFI 802.11 b/g/nBlutoothBLE V4.2
-Bus InterfacesUSRT, SPI, I2C, CAN, I2S, SDIO
-Onboard Functions 4 Groups of relays ,Optocoupler Isolation, 16 Expansion GPIO

Overview

Specs

Reviews

T-U2T auto- matic downloader The product needs the T-U2T auto- matic downloader to upload the program.
If you don' t have T-U2T, it needs to be bought to upload the program.
If you have,it is no need to buy again,it can be compatibled with our T-U2T series products.

HRS4H-S-DC5V Relay 4 Blue LEDS Relay Work Indicator
1. K1 Relay GPIO21
2. K2 Relay GPIO19
3. K3 RelayGPIO18
4. K4 Relay GPIO05
Power consumption 360 to 450 mW
Power supply input range DC 12-24V
Support T-U2T Upload Tool
Computer->USB Type-C data cable
Can be connectedto use T-U2T USB to serial downloader ,
convenient ,fast,USB data line can be directly powered
Product Pin Diagram Product Display Use ScenceReference
Shipping List Shipping List Product Display Side Light
Switch Light
Product size

CPU Supported
CPU Type	Other

Additional Information
First Listed on Newegg	July 16, 2026

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

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Return Policies

Return for refund within: 30 days
Return for replacement within: 30 days
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Item#: 9SIVSWGM1H1672