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Hello,

I just tried to install my Strompi3 by following chapter 5 in this manual: https://www.pienergy.joy-it.net/files/files/downloads/anleitungen/RB-StromPi3_Manual_2025-03-24.pdfhttps://www.pienergy.joy-it.net/files/files/downloads/anleitungen/RB-StromPi3_Manual_2025-03-24.pdf

But nothing happened when I enter the shortcut sspc in  the minicom terminal. So neither the Strompi3 console nor an error.

I tried to flash new firmware to the StromPi, following this guide: https://www.pienergy.joy-it.net/files/files/downloads/anleitungen/StromPi3-Firmware-Flash-Manual-20200714.pdfhttps://www.pienergy.joy-it.net/files/files/downloads/anleitungen/StromPi3-Firmware-Flash-Manual-20200714.pdf

But the flash process also does not start (although the dim blue light is showing up).

Could you help me out on this?

 

Hello rVm,

depending on your Raspberry Pi OS version, the symlink for the serial interface might be different.

You could try opening minicom with this command:

sudo minicom -D /dev/ttyAMA0 -b 38400

If this still doesn't work, you can try one of our prepared images.

It is important, that you do not have any additional hardware connected to your Raspberry Pi that uses the serial interface, except for the StromPi.
You should also make sure that there are no scripts running in the background that are using the serial interface. This also includes the StromPi scripts, such as the serialshutdown script.

If you have not already done so, you should also disconnect all power sources from the StromPi for a few seconds and disconnect the CAP jumper for a short time. This resets the microcontroller on the StromPi and often helps with problems.

Best regards

Tim (Joy-IT)

 

Hello Tim,

Thank you for your quick reply.

I tried the command, but that did not work.

I also tried the prepared image. When I run the Strompi3-Status, it silently fails. When I run the Config-GUI Skript it fails with “ValueError: could not convert string to float: b’’” at line 1023 in loading_process sp3_ADC_Wide = float(serial_port.readline(9999)/1000;

Als disconnecting the CAP jumper does not help. I have no other devices connected to the raspberry PI 4B except the Strompi3 and the Battery-HAT-XL.

To explain in more detail what I would like to achieve: I want to power the raspberry with 24V. When the power supply is turned off, the PI should shut down correctly after 10min. And when the power is turned on again, the PI should start up.

Could you help me further? We can also do a quick call to debug this problem.

 

Please double-check the positions of all jumpers. If they are set correctly (FLASH: OFF; AUTO: ON), it is unfortunately very likely a hardware defect.

In rare cases, the serial communication of the Raspberry Pi may be broken. If you have the possibility, you could try another Raspberry Pi.

If you do not have another Raspberry Pi to test it, I would just recommend exchanging the StromPi through your dealer.

Best regards

Tim (Joy-IT)