I initially had a bluetooth elm327 obd2 adapter but quickly realized that such a setup was providing limited performance in terms of PID read speed. The BT device was only capable of displaying and refreshing 5 sensors per second and would often disconnect from the ECU. With modern canbus networks, cars can now provide very fast communication speeds.
Below is the layout in my car
I opted for a wired obd2 connection as to ensure stability and fast communication. The obd2 adapter connects to the android tablet via a OTG USB-C cable. Below is the performance of said device.
With the wired adapter, Torque app can read close to 200 PIDs per second. The previous BT adapter was reading at 40 PIDs per second. This allows to display 10+ live sensors on the same page in Torque app.
Preview of my customized Torque app dashboard
PROS
Takes advantage of modern canbus network speeds
Very stable connection
Hackproof versus BT devices
Highly customizable setup
Logging data and graphing sensors
CONS
Connect the device prior to departure, each time
Cable from obd2 plug to tablet
Fuel consumption readings slightly off. Requires more calibration.
I seriously considered the Scangauge III, but I could not justify paying $300+ for a device that cannot log data. I will say though, LinearLogic offers reliable products and excellent customer support. My scangauge II is 11 years old and still going strong, but it was time for an upgrade.
Cheers.