I can recommend a odb2 dongle as well. Very interesting to plug in every once in a while. Do mind most dongles are read only though. You need a good cable to write. Be carefull if you want to tweak de ECU! Theres lotsnof info on the internet on how to tweak stuff.

$30 is way too expensive btw. On aliexpress i bought a wifi (because of iphone) dongle for $9,99 incl shipment.