Htcc-ab01 vs htcc-ab02

#21

hi,

sorry, I thought you wanted AM01.

If it is AB01, there should be no other way.

#22

Ok friend, got that. Thanks.

#23

@jasonXu Hello friend. I need to read analog voltage to get resistor value with know resistor voltage divisor. Also I need to measurement the current output voltage from GPIO pin.
The problem is the hardware only accept 2.4 v on ADC. I make a voltage divisor to get down the voltage but affect my other voltage divisor.

There is a workaround to read 3.3 volts with ADC or any idea how solve my problem ?

This is my circuit but I cant work like this because the ADC cant read 3.3 volts (the GPIO voltage)

Screenshot%20from%202020-11-18%2021-38-36
Screenshot from 2020-11-18 21-38-36.png1022×456 26.8 KB

#24

Hi @dserrano

The voltage divider circuit should be a network of pull-up resistors and pull-down resistors. For example, just like this:
image

In the example, the voltage on GPIO13 should be calculation like this:
image

1 Like
#25

Hi, did you made a SDS011 sensor integration?