If your modules aren't "talking," check these three common pitfalls:
This is a popular breakout board used with Arduino to provide a stable 3.3V power supply to the nRF24L01+ wireless transceiver . 5V DC (connects to Arduino 5V pin). yl105 datasheet better
// Warm-up: The missing datasheet note – wait 5 mins for stable copper interface Serial.println("Warming up sensor for 300 seconds..."); for(int i = 0; i < 300; i++) analogRead(sensorPin); delay(1000); If your modules aren't "talking," check these three
To provide the best information, I have categorized the technical specifications for each below. YL-105 nRF24L01+ Adapter Module YL-105 nRF24L01+ Adapter Module VCC → IR LED
VCC → IR LED (with current limiting resistor) → GND VCC → Phototransistor collector → Resistor divider → LM393 inverting input Potentiometer → LM393 non-inverting input (reference voltage) LM393 output → DO pin & output LED