I couldn't find a topic on here regarding this subject so just thought I would share. I've confirmed this works only on Android devices utilizing a cheap obd2 bluetooth adapter and cheap J1939 to obd2 adapter chord. I had one of these BT code scanners......BAFX Products (TM) - PIC18F2480... https://www.amazon.com/dp/B005NLQAHS...p_mob_ap_share
That i've used the past several years for my vehicles along with a few different free and paid apps on my android phone. The best one i've found for me so far is called Torque. It is a free app but I think i paid like $5 for the pro version which provides some additional features. The J1939 protocol that our tractors use is supported on Torque but is in Beta testing. Now I realize that our tractors have the ability to view diagnostic info through the instrument cluster but due to my tech crazy mind i wanted something a little more user friendly to be able to monitor things. So i put my head to the task and found this chord...... Mo-Co-So 1m/39" 9 Pin Male... https://www.amazon.com/dp/B011A0IQM2...p_mob_ap_share
which i confirmed matches up to the J1939 (Service Advisor) connector. Low and behold i can now view gauges and sensor values on my android phone via bluetooth connection. I've only spent a couple minutes with it but i like having the ability to monitor things like cylinder info, dpf pressures, temperatures, and the like, in a more user friendly readable format other than turn signalling through the instrument cluster. Hopefully some of you find this useful.