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troubleshooting.md

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Troubleshooting / Notes

  • The commands default to using /dev/ttyUSB0 if you are using direct USB connection try adding -d /dev/hidraw0 to the commands
  • if you have other USB devices connected the inverter might show up as /dev/hidraw1 or /dev/hidraw2
  • if uncertain, remove and re-connect the connection to the inverter and look at the end of the dmesg response to see what was reconnected
  • also in some instances only root has access to the device that the inverter is connected to - if you are getting no response try using sudo
  • if you are getting no/unexpected results add -I to the command to get some extra information
  • if you are getting no/unexpected results add -D to the command to get lots of extra information

Allowing non-root use of hidraw

  • if you want to be able to use a hidraw device as pi (or other users)
  • make sure the pi user is in the plugdev group sudo usermod -a -G plugdev pi
  • create a file /etc/udev/rules.d/99-hidraw.rules with the below as the content 
    KERNEL=="hidraw*", SUBSYSTEM=="hidraw", MODE="0660", GROUP="plugdev"
    • after a restart (or replug of the USB cable) any user of the plugdev group will be able to read from/write to any /dev/hidraw device
    • check with ls -l /dev/hidraw*
crw-rw---- 1 root plugdev 245, 0 Oct 15 03:17 /dev/hidraw0

JKBMS

Requirements

  • bluepy sudo pip3 install bluepy
  • paho-mqtt if publishing to MQTT sudo pip3 install paho-mqtt
  • a device with BLE support (Raspberry Pi 3 or 4 have BLE builtin)

Troubleshooting

  • Make sure the JK App is getting data correctly
  • Do a BLE scan (outside of python) sudo hcitool lescan
$ sudo hcitool lescan
LE Scan ...
3C:A5:09:0A:AA:AA (unknown)
3C:A5:09:0A:AA:AA JK-B2A24S
  • Try debuging without mpp-solar -p <mac address> -P JK04 -D
  • Log an issue with the above information