This error can mean a number of things. Essentially, it means not all the right processes are broadcasting to the comma two.
Rarely, the driver facing camera connector will become loose. When this happens, frontFrame will stop broadcasting - causing the
Communication Issue between Processes error. Check if your driver facing camera still works by going to
Settings -> Device -> Driver Camera View.
If you are running anything but
release2 on your device, it is likely the fork maintainer missed something - or has an error in their DBC file. A good way to check is to SSH into your device and type
There are some message that the device is not receiving properly. Usually this is resolved by fixing a loose connection.
This means the CAN bus that the radar sits on is not being received properly, which often means there is a loose cable somewhere.
Similar to a radar error, this means that a CAN bus is not being received by the device.
Disconnect and reconnect every connector from every plug. Ensure each plug is firmly seated in its respective connector. Do this for everything! The comma power v2, the harness box, and the ODB-C cable to the comma two.
If the error still persists, try flipping the ODB-C connection on the comma two. Sometimes the device will only accept all data lines from a certain direction of ODB-C.
If this doesn't fix the issue, it is possible to purchase replacement cables and A-B compare them to the included ones.
Get a better USB cable: thicker gauge and shorter length. The Panda outputs 5V, but due to resistance in the cable, there is voltage drop to the point where the EON cannot charge effectively.
For a cable to work, it must have all pins present. The only specs that do are USB-C 3.1 Gen 2 or USB-C with Thunderbolt. Cables below are recommended and confirmed to work. We ship with a 1.5ft cable for most harnesses, or a 3 meter cable on Nissan and OBD-II harnesses.
If none of this resolves the issue, it is most likely a bad harness box. Email [email protected] for further assistance, listing the things you tried.
Very rarely, the comma device can get corrupted during an update or by being unplugged without proper shut down.
This is usually fixed by reflashing the NEOS operating system back onto the device.
A guide on how to do this is here for Windows, Mac, or Linux. https://github.com/commaai/eon-neos#restoring-on-linuxos-x
If that still doesn't work, or if the device continues to reboot while in 'fastboot' mode, email [email protected] with your troubleshooting steps.
This is caused by the UNO board failing to communicate with the phone inside the comma device.
Note: this is always expected when the comma device is powered outside the car.
If the comma device is plugged into the car harness, please proceed.
1. Reboot the comma device a few times
Sometimes the device needs to be rebooted a few times to flash the internal UNO board. Did this fix the issue?
If you're running on a fork, you may have to SSH into your comma two and run
make recover in
2. Run SSH commands to reset the UNO board
There is a guide on how to SSH here: https://github.com/commaai/openpilot/wiki/SSH If you are still stuck, you can ask for help on discord.comma.ai.
PYTHONPATH=/data/openpilot python -c 'from selfdrive.thermald.thermald import setup_eon_fan, set_eon_fan; setup_eon_fan(); set_eon_fan(3);'
When these commands are run, this error is expected and can be ignored. 'sh: can't create /sys/module/dwc3_msm/parameters/otg_switch: Permission denied'
PYTHONPATH=/data/openpilot python -c 'from selfdrive.thermald.thermald import setup_eon_fan, set_eon_fan; setup_eon_fan(); set_eon_fan(0);'
3. Email support
If those commands still don't solve the issue after a device reboot, email [email protected] with your order # and your troubleshooting steps.
SSH into your device, and attempt to manually control the fan using this command.
cd /data/openpilot && PYTHONPATH=/data/openpilot python -c 'from selfdrive.thermald.thermald import setup_eon_fan, set_eon_fan; setup_eon_fan(); set_eon_fan(1);'
The value in the set_eon_fan function is the fan speed, anywhere between 0 and 3 (zero being off and 3 being the highest). Start with setting 1 and then set 0. (You will get a message about permission denied but the command still runs)
If your fan turns off when setting it to 0, then it is working properly. If it remains on, then your fan module is stuck in a state. Find other cooling solutions in #hw-unofficial on discord.
First SSH into your device. Once you are ssh'd into the device, you can monitor openpilot outputs with tmux
tmux a to attach to tmux window
` + d to exit tmux window (this is changed from the default
ctrl-b + d)