I know I am coming in late but I would have double checked your power and ground. Aside from that you should have the USB cable as a minimum. You should log if you're running the JB4 so you will either need to get a USB to OTG adapter or go with their Bluetooth option.
Someone else asked how the cables are ran into the DME enclosure. There is no ideal way but BMS said to put it on top (the flat part) and press the lid on to smash the cables.
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2011 E92 335i | 11.7@125 SOLD
2017 Camaro SS | 12.7@114 SOLD
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2020 F97 X3M | 11.0@123
2023 G80 M3 xDrive
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