//ADC PINS

    //ADC1_CHANNEL_0 = GPIO36
    //ADC1_CHANNEL_1 = GPIO37
    //ADC1_CHANNEL_2 = GPIO38
    //ADC1_CHANNEL_3 = GPIO39
    //ADC1_CHANNEL_4 = GPIO32
    //ADC1_CHANNEL_5 = GPIO33
    //ADC1_CHANNEL_6 = GPIO34
    //ADC1_CHANNEL_7 = GPIO35

    //ADC Input Voltage range

    //ADC_ATTEN_DB_0    100-950mV   0db attenuation
    //ADC_ATTEN_DB_2_5  100-1250mW  2.5db attenuation
    //ADC_ATTEN_DB_6    100-1750mW  6db attenuation
    //ADC_ATTEN_DB_11   100-2450mW  11db attenuation

void setup(){
Serial.begin(9600);
}

void loop(){
    float voltage2 = (float)analogRead(34)/4096*3.3;
//    float voltage = (float)analogRead(39)/4096*3.3*(28205/27000);
//    float voltage = (float)analogRead(39)/4096*3.3;
    Serial.print(voltage2,1);
    Serial.println("v");
//    Serial.print(voltage,1);
//    Serial.println("v");
    delay(2000);

// https://www.youtube.com/watch?v=S34R4zg03uE


}