Hi folks,

Hope you’re all keeping well and that your holidays have been lovely so far! 

I’ve been watching the OVMS project for just over a year since Mercedes announced they were going to shut down the Smart EQ servers (UK 453 Brabus). Then, we got my mum a module for Christmas so finally getting to play with it properly 😄 

However, I’m having some trouble with the V2 server. I’m using Dexter’s cloud server for now (thank you for hosting it!) with the aim to set Mum up with the Quarz iOS app (https://apps.apple.com/gb/app/quarz/id6740280553). 

If I start V2 on the module, it either crashes instantly or does so within a few minutes. If I enable autostart on it, it boot loops for a minute and then needs a manual reboot. Not so bad in the summer but having to go back outside to the car in 1°C weather isn’t my idea of fun 😂 

Problem is: when it crashes, there’s no crash data.

Last crash: IllegalInstruction exception on core 0

Registers:

PC : 0x00000000

PS : 0x00000000

A0 : 0x00000000

A1 : 0x00000000

A2 : 0x00000000

A3 : 0x00000000

A4 : 0x00000000

A5 : 0x00000000

A6 : 0x00000000

A7 : 0x00000000

A8 : 0x00000000

A9 : 0x00000000

A10 : 0x00000000

A11 : 0x00000000

A12 : 0x00000000

A13 : 0x00000000

A14 : 0x00000000

A15 : 0x00000000

SAR : 0x00000000

EXCCAUSE: 0x00000000

EXCVADDR: 0x00000000

LBEG : 0x00000000

LEND : 0x00000000

LCOUNT : 0x00000000

Backtrace: 

Version: 3.3.005-536-g20a42926/ota_1/edge (build idf v3.3.4-851-gfa4f07fb3b Dec 25 2025 16:43:35)

Hardware: OVMS WIFI BLE BT cores=2 rev=ESP32/3; MODEM SIM7600

Despite all this, I’m having no such issues with V3/MQTT. I’m happy to use that - and I intend to integrate it with Home Assistant so probably would aim for that in general, but the data usage is *so* much lower on V2 - and with a Hologram SIM, that’s pretty important - that I’d have preferred to go down that path.

Any ideas as to why it could be crashing?

Best wishes and kind regards,

Aaron

Aaron Carson (he/him)

✉️ : aaron@aaroncarson.co.uk
💻 : aaroncarson.co.uk
🔑 : 715E 0332 F7E1 E0F1

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