Specification
- Operating voltage: 2.7V – 5.5V
- Receiving range: 18 m
Connection Diagram
| Button (KY-004) | Arduino | NodeMCU / D1 Mini |
| – / G | GND | GND |
| middle (+) / R | +5V | +3.3V |
| S / Y (signal) | Pin 2 | Pin ??? |
Note: Include fritzing diagram
| Button (KY-004) | Arduino | NodeMCU / D1 Mini |
| – / G | GND | GND |
| middle (+) / R | +5V | +3.3V |
| S / Y (signal) | Pin 2 | Pin ??? |
Note: Include fritzing diagram