ADC and ADC_battery doesnt work together

#1

You can read the battery voltage with the function:

uint16_t voltage = getBatteryVoltage();

it worked fine.

You can read the voltage of the ADC-Pin with the function:

sensorValue = analogRead(ADC);

But when there is an analog signal, the battery voltage can no longer be read out, incorrect value is displayed.

When i open the connection to the ADC-Pin, the battery-voltage is shown right.

Here my test-Code:

void loop() {
// read the value from the sensor:
sensorValue = analogRead(ADC);

Serial.println (sensorValue);

batteryVoltage = getBatteryVoltage();

Serial.println (batteryVoltage);

delay(1000);
}

E_T

#2

Hope this document make sense to you:
https://heltec-automation-docs.readthedocs.io/en/latest/cubecell/frequently_asked_questions.html#how-to-use-the-adc-pin-for-analogread-asr6501

#3

In the new 6502 series, there have three ADC input channels.

#4

Thank you!

I will look for this device!

E_T