I tested few different combination of bluetooth modules and OBD readers. The solution I developed is for Opel Insignia but should work for any car. It will turn on, connect and turn off automatically when entering and leaving the car. We can however replace smartphone with arduino to display results on LCD. We also can’t use phone’s bluetooth for other purposes (playing music etc.). On top of that screen is active all the time which drains a lot of battery. Whole process is too tedious for me to do every time.
The drawback is we have to turn on app each time, connect to bluetooth and mount the phone in visible place. This solution provides all the information we need.
Use OBD scanner and smarphone app like OPL DPF MONITOR. It can therefore happen in the middle of busy traffic downtown which would suck. Know the DPF fill percentage we can’t predict when the process is going to trigger. Theĭrawback of this solution is we don’t get to know DPF fill percentage, burning status or kms since last regeneration. When soot is being burned, mirror heats and LED turns on. You can simply install LED by attaching it to the same circuit mirror heater use. When burning soot many cars turn on additional electronic devices to create higher load on engine. Unfortunately most vehicles don’t provide any information about DPF on dashboard (does anybody know why?). Having car that can display DPF information by default. How can you monitor it then? There are few ways: Knowing when DPF soot is going to be burned out and what is the current status of burning is crucial for keeping many vehicle components in good condition. 
If you own a diesel car chances are you know about issues caused by unsupervised DPF burnouts.
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