BoardPilotTDS water quality sensor with ESP32
Supply 3.3-5 V
Bus ANALOG
Measures tds
Pins and ESP32 wiring
| Pin | Role | ESP32 pin | Notes |
|---|---|---|---|
| A | Analog output | D34 | 0 to 2.3 V, safe for the ESP32. To an ADC1 pin (GPIO 32 to 39) |
| VCC | Power | 3V3 | Marked + on the board |
| GND | Ground | GND | Marked - on the board |
Suggested wiring for the 30-pin ESP32 DevKit, avoiding flash, input-only and strapping pins. BoardPilot checks it for you as you wire.
Starter code (Arduino)
void setup() { Serial.begin(115200); }
void loop() {
int mv = analogReadMilliVolts(34); // A on GPIO 34
Serial.println(mv);
delay(200);
}Sources
- DFRobot SEN0244 Gravity TDS meter wiki, Supply 3.3 to 5.5 V, output 0 to 2.3 V; needs water temperature for compensation
- DFRobot SEN0244 Gravity TDS meter wiki, Do not use it in the same container as a pH probe: they interfere
Try it in 3D in BoardPilot
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Part data: CC BY 4.0, free to reuse with credit to BoardPilot.