XIAO_MG24 battery voltage measurement function is not available

Products & Technology XIAO
6

Here is an easy way to measure the battery

pinMode(PD3, OUTPUT);
digitalWrite(PD3, 1); //enable VBAT to ADC switch

int mv = (analogRead(PD4) * 1000) / 610;
Serial.print("Battery mV = ");
Serial.println(mv);