BoardPilotSolid state relay module (G3MB-202P) with ESP32
Supply 5 V
Bus GPIO
Pins and ESP32 wiring
| Pin | Role | ESP32 pin | Notes |
|---|---|---|---|
| DC+ | Power | VIN | Needs 5 V: use VIN |
| DC- | Ground | GND | |
| CH1 | Input (the ESP32 drives it) | D25 | LOW = on on most modules |
| SW1 | Not wired to the ESP32 | — | Load terminals: AC only, 2 A max. Mains voltage is dangerous |
Suggested wiring for the 30-pin ESP32 DevKit, avoiding flash, input-only and strapping pins. BoardPilot checks it for you as you wire.
This module is sold for 5 V. Its outputs may be 5 V: use a level shifter or a voltage divider on ESP32 inputs.
Starter code (Arduino)
void setup() { pinMode(25, OUTPUT); } // CH1
void loop() {
digitalWrite(25, HIGH);
delay(500);
digitalWrite(25, LOW);
delay(500);
}Sources
- Omron G3MB datasheet, AC load only (zero cross), 2 A max, input 5 V
Try it in 3D in BoardPilot
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Part data: CC BY 4.0, free to reuse with credit to BoardPilot.