So the few times I’ve updated firmware, I’ve always used the simple approach of adding my switch to my z-wave stick (Aoetec), updating, then having to exclude/include back to SmartThings. Yes, a massive pain as that process breaks all existing automations, routines, etc. So I was pleased to learn about the secondary controller method.
It *seemed like I was on the right track, as I followed the instructions in the Inovelli tech notes as well as similar guidelines elsewhere. I seemed to have added my z-wave stick to SmartThings as a secondary controller and it looks like I was able to perform a “GET” to get the firmware version. I ended up reseting my z-wave stick to factory defaults, manually deleting it from SmartThings and trying to add it back to ST. It adds back, my devices come over into SIC Z-Wave controller software but I cannot perform a “GET”. It fails with “ota firmware update iniitalization failed”. So the big thing is that on subsequent re-adds I am not getting the security prompt, it just adds it and the slave devices. I actually looked at the log and it made mention of security failing during the add. I was researching this and I remember reading somewhere that someone reset the S0 and S5 security? I have no idea how to get my z-stick and/or ST to go back to a state and re-prompt for the security pin/code.