I have a rPi 2 + HM-MOD-RPI-PCB with 8 HM-CC-RT-DNs, one HM-LC-Sw4-WM and a HM-TC-IT-WM-W-EU.
Everything works fine, but one single HM-CC-RT-DN refuses to pair, even after I reset the device to factory defaults. I do a
pon and pair the device just like the other 8 but it never actually pairs.
Edit: never mind, I reset everything and it works fine now.