Errors from API calls

End-of-Life Product Sixfab Power HAT & Software
1

I’m using the Power HAT Python API to get all the parameters from the device, but it only works intermittently.

For example, in one run just now, of the 13 parameters I read, 6 returned results and the others threw the exception 'NoneType' object is not subscriptable at, for example https://github.com/sixfab/sixfab-power-python-api/blob/master/power_api/power_api.py#L102
Which calls work and which do not appears to be random.

In addition, I’m getting a confusing response to get_battery_charge(). At this moment it’s returning 16 while the Power software (website) shows the battery is at 97%. What’s going on there?

2

Hi @tyrelh ,

Maybe there is some noise or confusion on the bus that is causing this issue. Try calling the function a few times.

The values returned by the API are correct. Values in power software may not be up to date. You can check the status of the services.

Thank you.

3

This seems to happen if you try to run API requests locally while the power_agent is running.
If you stop the power_agent the errors will hopefully disappear.

I have not found a good way to enable both the power_agent and using the local api reliably at the same time.

4

Oh yes, thanks @ola that was the problem. I disabled the two power_* services and now I can reliably call the API.