It looks like I am far from the only one to suffer this issue. The EVC drops off the network with a W-104 Error message about every one or two days. I installed the EV Charger 8 days ago to charge my new EV. The house is off-grid and uses all Victron gear. The controller is a Venus. The network is a Unifi system. After reading this entire thread I have tried the following:
- I created a dedicated 2.4Ghz wifi SSID that is only broadcast from one AP and is ONLY used by the EVC.
- Wifi has Enhanced IoT Connectivity turned on.
- The EVC is set to zero scanning and only one wifi network is listed.
- A continuous ping has response’s that range from 19ms to 1200ms and drops one packet in about 40 (scanning is OFF)
I have done some embedded systems programming with with Espressif esp32 boards and know how erratic they can be - and how difficult it can be to debug Wi-Fi and Bluetooth issues. While I’m extremely disappointed by this problem, I’m here to offer as much info and help as possible - not to simply complain.
The only solution I have found is to completely reboot the EVC from the Bluetooth interface - not great when I am away from home for a week!
I have had issues like this with other boards and have sometimes found that the workaround is more about what the board does once the error is detected (for example, can it not just reset the Wi-Fi subsystem and try to reconnect when a W-104 error is detected??).
As I said, I am offering my help to the developers who are trying to track down the cause of the issue, the error seems to be fairly regular on my system - so I’m happy to try things (when I’m home) and/or collect data.
Gavin (Queensland Australia)