Grove GSR skin response sensor with ESP32

Supply 3.3-5 V Bus ANALOG Measures skin conductance

Pins and ESP32 wiring

Pin	Role	ESP32 pin	Notes
SIG	Analog output	D34	Yellow wire. To an ADC1 pin (GPIO 32 to 39). Power from 3V3 to keep it in range
NC	Not wired to the ESP32	—	White wire. Not connected
VCC	Power	3V3	Red wire
GND	Ground	GND	Black wire

Suggested wiring for the 30-pin ESP32 DevKit, avoiding flash, input-only and strapping pins. BoardPilot checks it for you as you wire.

void setup() { Serial.begin(115200); }

void loop() {
  int mv = analogReadMilliVolts(34);  // SIG on GPIO 34
  Serial.println(mv);
  delay(200);
}

Seeed Grove GSR sensor wiki, Grove pins SIG, NC, VCC, GND; supply 3.3 or 5 V; analog output

Part data: CC BY 4.0, free to reuse with credit to BoardPilot.