The Lime AC Case is not compatible with LimeSDR Mini v2.
There was an announcement of Lime AC Case 2.0, but it is still in the “Coming Soon” state. There are a couple of things you can do meanwhile to make the case fit:
- Lime AC Case - Addressing Case Incompatibility with Lime SDR Mini 2.0 | Crowd Supply
- Lime AC Case with LimeSDR Mini 2.0 now machined to fit correctly
From my understanding for the fan to work you need to enable it. See the FAN CONTROL at the last page of schematic: LimeSDR-Mini-v2/hardware/2v2/Project Outputs/LimeSDR-Mini_2v2_Schematic_r0.PDF at main · myriadrf/LimeSDR-Mini-v2 · GitHub
Not sure what exact API is expected to be used for it, there are RFE_Fan and Cmd_Fan. I never used them, so can not guide you further. Maybe someone from Myriad-RF can help you further.