Asking for Help

[Bra1nsen]

Hey Iam a Beginner. And Iam looking for help. Maybe you can.

I would like to use the waveshare high precision adc hat with raspberry pi4.

I goal is measure voltage (screw terminal)

Solar Cell:
GND --> COM
V --> IN0

Now i want to save the measured values in choosable timestamps (for example 30s)

happy greetings
Paul

[AnnaKnapp]

Hi, I would recommend that you start by taking a look at the file "readADCdataAndSaveToFile.py" in the examples folder - most of the functionality you need will be in that file.

You will need to change a few things:

• the pins used for communication with the pi - see the waveshare datasheet to know which to use.
• The input pins on the ADC - see line 83 for an example of how to set these. They are set by changing the values sent to the INPMUX register.
• Use pulse conversion instead of continuous like in the example. To set pulse conversion you need to set the MODE0 register to MODE0_RUNMODE_PULSE, and use the function read_Data_By_Command_CHK instead of read_Continuous_CHK (Documentation here: https://annaknapp.github.io/python_piadcs/piadcs.ads126x.html#piadcs.ads126x.ads126x.read_Data_By_Command_CHK)

A note about the waveshare ADS1263 hat - this hat has 2 flaws in my opinion that will prevent you from getting the most out of the ADC.

• The hat design situates the ADC right above the Pi's CPU which will cause temperature gradients that will impact performance
• There is no isolation between the ADC and the the Pi and the ADC just uses the Pi's power supply which is ok, but not the cleanest.
  Of course the waveshare hat will still work and is great for developing with this ADC but you will not get the highest possible resolution measurements.

[Bra1nsen]

Thank you for the detailed words.

In principle, I just want a small program that records the global radiation in a table every 30 seconds. (volt meter)

What exactly do the numbers in brackets mean?

[Bra1nsen]

Unfortunately, I don't quite see through it and would rather continue to work on algorithmics. You seem to have enough experience. Of course, I would transfer you something to Paypal for your effort.

[Bra1nsen]

Thats my setup. The cpu gets cooled. <55*C