The T-Relay 4-Channel Relay Module is a versatile and powerful solution for controlling multiple devices through relays. With 4 relays, optocoupler isolation, and 16 expansion IOs, this module supports a wide range of communication protocols, including UART, SPI, I2C, CAN, I2S, and SDIO, making it ideal for both industrial and hobbyist projects. The module supports Wi-Fi (802.11 b/g/n) and Bluetooth V4.2 BR/EDR & BLE for wireless control.
Key Features
- MCU: ESP32-Wrover-B
- Flash: 4MB
- PS RAM: 8MB
- Communication Protocols: UART, SPI, I2C, CAN, I2S, SDIO
- Wi-Fi: 802.11 b/g/n
- Bluetooth: V4.2 BR/EDR & BLE
- Onboard Features: 4 Relays, Optocoupler Isolation, 16 Expansion IOs
- Relay Type: HRS4H-S-DC5V
- Standard Power Consumption: 360 to 450mW
- Relay Work Indicator: Blue LED for each relay (K1, K2, K3, K4)
- Max Response/Release Time: 8ms/5ms
- Max Working Current: 15A
- External Power Input Range: DC12~24V
- Operating Temperature: -40~80°C
Important Notes
- This product does not include a programmed download chip.
- To upload programs, a T-U2T Auto Downloader is required.
- If you don’t have the T-U2T, you will need to purchase the T-U2T Auto Downloader separately.
- If you already own a T-U2T, you only need one T-U2T Auto Downloader to be compatible with the T-U2T series products. No need to purchase it again.
Specifications
| Feature | Details |
| MCU | MCU32-Wrover-B |
| Flash | 4MB |
| PS RAM | 8MB |
| Communication Protocols | UART, SPI, I2C, CAN, I2S, SDIO |
| Wireless Protocol | Wi-Fi: 802.11 b/g/n, Bluetooth: V4.2 BR/EDR & BLE |
| Onboard Features | 4 Relays, Optocoupler Isolation, 16 Expansion IOs |
| Relay Type | HRS4H-S-DC5V |
| Max Working Current | 15A |
| Power Input Range | DC12~24V |
| Operating Temperature | -40~80°C |
Supported Downloaders
- T-U2T Downloader: Compatible with T-U2T USB-to-Serial Downloader for easy, fast, secure, and aesthetically pleasing downloading.
- Type-C USB Power: Direct power supply via Type-C USB without the need for additional cables.
Applications
- Smart Control: Ideal for smart home projects, industrial automation, and more.
- Relay Control: Perfect for controlling high-power devices with a low-power microcontroller.
- IoT Applications: Use in Wi-Fi and Bluetooth-based IoT projects.
Includes:
T-Relay 4-Channel Relay
- 1 x T-Relay 4-Channel Relay
- 2 x Pin Headers
T-Relay 4-Channel Relay + T-U2T Downloader
- 1 x T-Relay 4-Channel Relay
- 1 x T-U2T Downloader
- 2 x Pin Headers