Design with Smart 4Ch Relay Switch 10A + Shell | RF433Mhz + BT | DC or AC In | WiFi Tuya Smart Life in Cirkit DesignerThe Smart 4Ch Relay Switch (Model: TYWD 4ch-RF) is a versatile electronic component designed for controlling up to four independent channels. It supports both DC and AC inputs, making it suitable for a wide range of applications. With built-in RF433MHz, Bluetooth, and WiFi connectivity, this relay switch can be remotely controlled via the Tuya Smart Life app, enabling seamless integration into smart home or industrial automation systems.
This circuit is a smart home automation system that uses an ESP32 microcontroller to control multiple relays, which in turn control AC bulbs and fans. The system includes several flush switches for manual control and an HC-05 Bluetooth module for wireless communication, all powered by a 5V adapter.
Open Project in Cirkit Designer
This circuit is a smart home automation system using an ESP8266 NodeMCU microcontroller to control three AC bulbs via a 4-channel relay module. The system includes pushbuttons for manual control, an LCD for displaying the status of the loads, and WiFi connectivity for remote control through the Sinric Pro platform.
Open Project in Cirkit Designer
This circuit is a smart home automation system using an ESP8266 NodeMCU microcontroller to control three AC bulbs via a 4-channel relay module. The system includes pushbuttons for manual control, an LCD for status display, and WiFi connectivity for remote control through Sinric Pro.
Open Project in Cirkit Designer
This circuit is a smart home lighting control system using an ESP8266 microcontroller to control four AC bulbs via a 4-channel relay module. The ESP8266 receives input from four flush switches and controls the relays to switch the bulbs on and off, with power supplied by a DC power source and a 240V AC power source for the bulbs.
Open Project in Cirkit Designer| Parameter | Specification |
|---|---|
| Manufacturer | Tuya |
| Model Number | TYWD 4ch-RF |
| Input Voltage Range | DC: 5V-24V / AC: 85V-250V |
| Maximum Load Current | 10A per channel |
| Connectivity | RF433MHz, Bluetooth, WiFi (Tuya Smart Life app) |
| Number of Channels | 4 |
| Operating Temperature | -10°C to 60°C |
| Dimensions | 145mm x 90mm x 40mm |
| Shell Material | ABS Plastic (Fireproof) |
| Certifications | CE, FCC, RoHS |
The relay switch has a terminal block for input power and output connections. Below is the pin configuration:
| Pin Name | Description |
|---|---|
| L | Live wire for AC input |
| N | Neutral wire for AC input |
| DC+ | Positive terminal for DC input |
| DC- | Negative terminal for DC input |
| Pin Name | Description |
|---|---|
| NO | Normally Open terminal |
| COM | Common terminal |
| NC | Normally Closed terminal |
| Pin Name | Description |
|---|---|
| RF433MHz | RF signal receiver for remote control |
| BT | Bluetooth module for local control |
| WiFi | WiFi module for Tuya Smart Life app |
Power the Relay Switch:
DC+ and the negative wire to DC-.L and the neutral wire to N.Connect the Load:
COM and NO terminals if you want the circuit to be normally open (default off).COM and NC terminals if you want the circuit to be normally closed (default on).Control the Relay:
Integrate with IoT Platforms:
The relay can be controlled using an Arduino UNO via its GPIO pins. Below is an example code to control one of the relay channels:
// Example: Controlling a single channel of the Smart 4Ch Relay Switch
// Connect the relay's input pin (e.g., CH1) to Arduino pin 7.
#define RELAY_PIN 7 // Define the GPIO pin connected to the relay
void setup() {
pinMode(RELAY_PIN, OUTPUT); // Set the relay pin as an output
digitalWrite(RELAY_PIN, LOW); // Initialize the relay to OFF state
}
void loop() {
digitalWrite(RELAY_PIN, HIGH); // Turn the relay ON
delay(5000); // Keep it ON for 5 seconds
digitalWrite(RELAY_PIN, LOW); // Turn the relay OFF
delay(5000); // Keep it OFF for 5 seconds
}
Note: Use a transistor or optocoupler if the relay requires more current than the Arduino pin can supply.
Relay Not Responding to Commands:
WiFi Connection Fails:
Load Not Switching:
COM and NO or COM and NC).Overheating:
Q1: Can I control the relay without WiFi?
Yes, you can use the RF433MHz remote or Bluetooth for local control.
Q2: Is the relay compatible with voice assistants?
Yes, it can be integrated with Google Home or Amazon Alexa via the Tuya Smart Life app.
Q3: Can I use the relay for both AC and DC loads simultaneously?
Yes, but ensure proper isolation and do not exceed the maximum current rating per channel.
Q4: What is the range of RF433MHz control?
The typical range is 20-30 meters, depending on environmental factors.
Q5: How do I reset the relay?
Press and hold the reset button for 5 seconds until the LED indicator blinks rapidly.