ADC2

[MisureMeccaniche]

Hello, we are working on a project where we wish to use Wipy with ADC, without Wifi and without Bluetooth. We already test it with a first Wipy and it work fine but, unfortunately (due to the new italian law) suchapplication require to have 9 x ADC. Is it possible to use the second ADC2, on the Wipy?
Kind regards.

[robert-hh]

@MisureMeccaniche I do not know besides the number of channels you mentioned the quality requirements for the ADC measurement. You should be aware that the ESP32 ADC is not of the best quality. It is noisy and non-linear. The effective resolution you can expect form it is 8-9 bit. If that is fine, you can use it. Besides the second ADC you can also use an external analog multiplexer to increase the number of channels.

[MisureMeccaniche]

@robert-hh Hi Robert, we already test ADC1 and they work fine, with good resolution for this application.
When we go to use ADC2 we receive an error message like "resource not available": is it our mistake or ADC2 is not available from your firmware?
We need 9 ADC channels, at least, and it is notm possible to use a second board.
Kind regards.

[robert-hh]

@MisureMeccaniche ADC2 is not available in the Pycom firmware, and also not in the genuine micropython.org firmware. Even if there is discussion of making it available, the outcome and timeline is unclear.

[MisureMeccaniche]

@robert-hh OK, it seems unclear from several years :-(
From some discussion it seems possibler to access ADC2 using C, disactivating wifi (and Bluetooth probably): is there the actual firmware version of Wipy, available to download from Github?
Kind regards.

[robert-hh]

@MisureMeccaniche The firmware is here: https://github.com/pycom/pycom-micropython-sigfox together with instructions to get the Pycom specific IDF and to build the firmware. A Linux environment works best for the purpose.