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I'm planning a setup with an rpi3b+ and the pijuice hat (battery) and pijuice solar module. It is key to my project that I can access the following data digitally i.e. in the pi:

  • current power consumption of the pi
  • current power output from the solar panel
  • battery charge in %

The pijuice hat connects directly to the pi's 40-pin gpio header and is already supplying me with the battery charge in percent. The panel is plugged into the power management board (hat).

What components do I need to measure the consumption of the pi and the output from the panel?

rn42v
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2 Answers2

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What you are describing is a coulomb counter. Looking at the pijuice Hat you linked to I do not see that function. Take a look at Grove coulomb counter, it is based on the LTC2941 by analog devices. It is also sold in the Arduino arena. There are several available from different sources and/or you can make your own.

Gil
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  • According to the OP, "The pijuice hat connects directly to the pi's 40-pin gpio header and is *already supplying me with the battery charge in percent.*" IOW, sounds like he's got the Coulomb counter & wants to "measure the consumption of the pi and the output from the panel" Whaddya' think? – Seamus Mar 28 '22 at 16:51
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It was in their documentation all along, I was simply looking for the wrong thing. Both input and output can the read via their api.

rn42v
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  • Your answer could be improved with additional supporting information. Please [edit] to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers in the help center. – Community Mar 30 '22 at 14:06