OVMS V3 (SIM7600 LTE) – Nissan Leaf ZE1 – server connection and SOC issue

Hello,

I have just installed an OVMS V3 module in my Nissan Leaf ZE1 (40 kWh).

Hardware installation appears correct and the module communicates with the vehicle CAN bus.

Current system information:

Vehicle: Nissan Leaf ZE1 (40 kWh)
OVMS hardware: OVMS V3
Modem: SIM7600 LTE
SIM card: Hologram IoT (network: Vivacom Bulgaria)
Firmware version: 3.3.001 (Dec 2021)

Observed behaviour:

• Cellular connection works (modem registers on network)
• Battery voltage is detected (~386 V)
• Odometer is read correctly
• OVMS mobile app connects to the vehicle
• However SOC shows 0%
• Some values look incorrect (regen %, cabin temperature ~51°C)
• Server connection sometimes shows “Last seen X minutes ago”

I suspect the firmware may be outdated for Nissan Leaf ZE1 support.

Questions:

What firmware version is currently recommended for OVMS V3 with SIM7600?
Should I upgrade to the latest "main" or "edge" firmware?
Are there any required configuration changes for Nissan Leaf ZE1 (SOC / GIDs settings)?

Any advice would be greatly appreciated.

Best regards,
Ivan Hristov
Bulgaria

I have the same car and had the same problems as you, but I think I got around them!

Most of your problems is answered in the docs under the Troubleshooting part

Also make sure you tick the box for ZE1 inside the modules WEB-UI (Nissan Features) and enable CAN writing.

The difference between ZE0 and ZE1 seems to be we have to use "relative to fixed number". But you most likely need to enter a different number than 502 listed in the example!
Because of battery degradation you need to charge your car to 100%, battery full and then do a reading of your current GID.
To do that login to your V2 server host, I used dexters-web.de then find and click "Shell". Then type:

metrics get xnl.v.b.gids

The OVMS module will then reply with your current GIDs number, which will represent your new max GIDS for SOC=100%.

Enter this number as your relative to fixed value. Then reboot your OVMS module in order for the SOC value to update. It will eventually update, but I found it to take a while to update unless restart. To restart either type

module reset

Or press the Reboot button in the Web-UI under Status->Hardware

I use the OVMS Connect app for iOS which seems great, but connects to Server V3. It seems that default behaviour is to not autostart server V3 on boot. There's a setting under config-->autostart inside the webui to enable autostart of V3

Now if you type:

config list xnl

Inside the shell, you should get info like:

xnl (readable writeable)

cabintempoffset: -34

canwrite: yes

cfg_ev_request_port: 1

gid.full: 420

maxGids: 428

modelyear: 2018

newCarAh: 115

soc.newcar: yes

soh.newcar: yes

speeddivisor: 98.0

ze1: yes

Your problem with cabin temperature I think must be solved by using the correct offset. You see I currently use -34, but I must tweak it a bit more due time