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Here's a solution written by pmessier - from https://github.com/JejuSoul/OBD-PIDs-for-HKMC-EVs/issues/43
The easiest way to get the raw data is using an OBD2 terminal app. The one I used in the past no longer exist on Google Play. I tried several today, and this one was easy to use :- OBD Now Terminal app
Here's the procedure:
1:- Make sure to connect/power on your OBD2 adapter just before connecting using OBD Now Terminal (do not connect using Torque before, for example).
2:- Open OBD Now Terminal, and accept the filesystem access permission if needed
3:- Connect to your OBD2adapter using the app
4:- Send the following commands in the following order
ATH1
2101
2102
2103
2104
2105
5:- This should look like this:
6:- The data was logged in a file. The path on the Android device is given in OBD Now Terminal help, but for reference it's under /storage/emulated/0/OBD Now Terminal/Log***.txt