I have a Raspberry Pi 3 in my 2016 Jeep Rubicon Hard Rock with a PiCAN2 Hat spliced in the CAN behind the radio and it's working fine. The RPi3 is acting as a wireless hotspot and a webserver in addition to a few other things. So that I can connect my phone to the Pi and pull up a webpage I made to and click a link to read/write to/from the CAN bus. I can read the status of the doors, control the windshield wipers, blinkers, etc.
I purchased Carloop with the RedBear Duo from MassDrop. I've added the ReadBear to my particle account and flashed the "minimal transmit" sketch. I can run cansniffer on the Pi3 and never see the Carloop transmit anything to CAN. I initially thought it was something with the RedBear, so I swapped it out with a Photon soldered to the battery shield I use for testing. Same issue! Whatever I transmit never comes across.
I thought maybe the Pi3 is interfering with the Carloop? I changed the code on the minimal transmit sketch to control the left blinker, so that I could disconnect the Pi3 and have a visual indication. I know that CAN message works because I am able to use it on the Pi3, but nothing happened.
I have been playing with CAN for a while with the Pi3, I work on PLCs for a living, I have a programming background, but I don't understand what I'm missing... I read through the getting started section, and the rest of the community, seems pretty straight forward. Any thoughts?