HTCC-AB02A ADC resistor?

#1

I’m trying to use the ADC pins on my HTCC-AB02A boards. Unfortunately, so far I’ve been unsuccessful. Since the AB02A has three ADC’s, do I still need to remove a resistor to make those work?

The code I tried is the basic ADC example:

#include "Arduino.h"


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
}

uint16_t voltage;

void loop() {
  // put your main code here, to run repeatedly:
  voltage=analogRead(ADC);//return the voltage in mV, max value can be read is 3300mV
  Serial.print(millis());
  Serial.print("  ");
  Serial.println(voltage);
  delay(1000);
}

The reading does not change at all.
Also, how do I select between the ADC pins?

1 Like
#2

HTCC-AB02A has three ADCs, they are ADC1(ADC == ADC1), ADC2, ADC3. You can get their voltage :
analogRead(ADC1);
analogRead(ADC2);
analogRead(ADC3);