[Ovmsdev] OVMS v2 crashing module

[Aaron Carson]

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).
<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 at aaroncarson.co.uk
💻 : aaroncarson.co.uk <https://www.aaroncarson.co.uk/>
🔑 : 715E 0332 F7E1 E0F1
<https://keys.openpgp.org/vks/v1/by-fingerprint/45982EB56486CED008DAED0D715E0332F7E1E0F1>
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