Help with RAK19001 and I2C Sensor

WisBlock
5

Hi @Aurithemas ,

You need to use three analog inputs.

If you are using RAK19001 as baseboard and RAK4631 (Not RUI3), you can use WB_A1, WB_SPI_MOSI and WB_SPI_MOSI as analog inputs. WB_A0 is connected to VBAT so you cannot use it (unless the voltage divider on WB_A0 wont have any on the sensor readings).

These are the pins.

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Here’s a sample sketch on getting the analog reading.

#include "Wire.h"

// These constants won't change. They're used to give names to the pins used:
const int analogInPin = WB_A1;  // Analog input pin that the potentiometer is attached to
const int analogInPin2 = WB_SPI_MOSI;  // Analog input pin that the potentiometer is attached to
const int analogInPin3 = WB_SPI_MISO;  // Analog input pin that the potentiometer is attached to

int sensorValue = 0;        // value read from the pot
int sensorValue2 = 0;        // value read from the pot
int sensorValue3 = 0;        // value read from the pot

void setup() {
  // initialize serial communications at 9600 bps:
  Serial.begin(9600);
}

void loop() {
  // read the analog in value:
  sensorValue = analogRead(analogInPin);
  sensorValue2 = analogRead(analogInPin2);
  sensorValue3 = analogRead(analogInPin3);

  // print the results to the Serial Monitor:
  Serial.print("sensor = ");
  Serial.print(sensorValue);
  Serial.print(" sensor2 = ");
  Serial.print(sensorValue2);
  Serial.print(" sensor3 = ");
  Serial.println(sensorValue3);

  // wait 500 milliseconds before the next loop for the analog-to-digital
  // converter to settle after the last reading:
  delay(500);
}

You also have the option to use the WisBlock ADC module RAK16001. This can give you more reliable readings than the built-in ADC. Of course, it still depends on your preference.

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