| Pin | Function | |-----|----------| | VCC | 3.3V – 5V DC | | GND | Ground | | DO | Digital output (LOW = wet, HIGH = dry) | | AO | Analog output (0–5V, higher voltage = more wet) |
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That’s it. But for a implementation, you need these missing parameters: | Pin | Function | |-----|----------| | VCC | 3
// DO NOT DO THIS void setup() pinMode(2, OUTPUT); digitalWrite(2, LOW); delay(1); // Too short! Datasheet says 18ms minimum pinMode(2, INPUT); yl105 datasheet better