arduino IDE command equivalent? (for MicroPyhton, pot.atten(ADC.ATTN

Q&A Forum › Category: ESP32 › arduino IDE command equivalent? (for MicroPyhton, pot.atten(ADC.ATTN_11DB)

Virapong Chongpatiyutt asked 7 years ago

(The following line applies just to the ESP32. It defines that we want to be able to read voltage in full range. This means we want to read voltage from 0 to 3.3 V.)

pot.atten(ADC.ATTN_11DB)

what is this equivalent commend for Arduino IDE?

1 Answers

0 Vote Up Vote Down

Sara Santos Staff answered 7 years ago

Hi.
In the setup() try the following:

analogSetPinAttenuation(ADC_PIN,ADC_6db);

in which ADC_PIN corresponds to the GPIO you are getting the readings. The second argument can be one of the following:
(ADC_ATTEN_DB_0) 0dB attenuaton: gives full-scale voltage 1.1V
(ADC_ATTEN_DB_2_5) – 2.5dB attenuation gives full-scale voltage 1.5V
(ADC_ATTEN_DB_6) – 6dB attenuation gives full-scale voltage 2.2V
(ADC_ATTEN_DB_11) – 11dB attenuation gives full-scale voltage

Then, right after that add the following lines:

adcAttachPin(ADC_PIN);
adcStart(ADC_PIN);

I hope this helps.
Regards,
Sara 🙂