jeffreycowart Posted December 3, 2024 Posted December 3, 2024 Was freaking out last night as I typed up the situation below. Luckily, I discovered the issue and all is good now, but thought I would still post for anyone else who has my lucky timing... Here was the situation: ISY994 All Z-wave, no Insteon. UI and Firmware on 5.3.4 My ISY994 has been running just fine, until today when I added a Zooz ZAC38 Range Extender. I did my normal process of exclude twice, then included the device using the UD mobile app. I always have it show progress. It added a bunch of nodes, but it seemed like it might have stopped/stalled before finishing. Seems like I usually read something in the progress that tells me it's finished. I waited approx 1 minute and there was no movement, so I clicked the finish button. It asks if I wanted to synchronize, I said yes and it went through it's process (I thought). It then asked me if I wanted to delete 1,5xx old cached values, which I thought was odd, since it is usually a very low number. I said no, then went to the admin console. I get the error: "Initialization Incomplete: Cannot retrieve nodes from the ISY. Would you like to close the Admin Console." First times I said yes. Then tried clicking no, it goes to admin console, but only ISY is at the top no z-wave nodes. Elk is showing status, programs are there, but they are all "unrecognized nodes" I have: Rebooted ISY via UD mobile Unplugged ISY for 60 seconds Removed SD card and cleaned contacts Cleared Java Cache and got a new start.JNLP Excluded new ZAC38 device via UD Mobile Z-Wave Synchronize nodes via the Z-wave drop down. It tried and went through the process twice (status bar showing progress). On second attempt, the status bar just went away. (Below I noticed using the event viewer that one device was flooding the viewer during the sync). Was about to factory reset the Z-wave dongle, thank goodness I didn't. Z-wave continues to work and I can remote control devices via UD Mobile (i.e. turn lights on/off). If I try to synchronize UD mobile it freezes at Z-wave instance 1... After a while it continues with lots of errors: ISY header no response, etc. Since the sync fails, the z-wave devices are still visible and can be used. Through the admin console I was able to open the event viewer. Level 1 nothing special going on. Level 3 one device is providing an "Binary switch report" every second. ISY admin console didn't show as "Busy" in the lower left corner, but it was a constant request. This is a simple On/Off Homeseer HS-WS100 device. That has been in place for approx 7 years. Once I figured out which switch it was, I went and took a look. It had the flashing LED indicator strobing at 1 hz. The switch had gone bad. I removed power to that switch and all was working as normal again! It was basically causing a DOS attack on my system, but switch went bad right as I was adding the Zooz range extender, so I thought that was the culprit. Or the switch was already flooding the network and the add device failed due to network traffic. I have had these Homeseer (same as Jasco/Dragontech) go bad before, but they have never caused a DOS. They just don't work locally or remotely. FYI, these switches can be fixed by replacing a small capacitor on the start circuit. I replaced the capacitor and the switch is back in place working fine now!
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