I have been utilising the Deta Grid Connect PIR sensor for quite a few weeks now and have had an issue 2 times where it disconnects from the network, now I'm sure this happens on other smart devices and is easily resolved without even knowing when say the light switch is turned off but when the PIR is wired in parallel it has constant power to the sensor allowing operation from the sensor or from the switch.
The PIR will operate as a non smart device when no network is present meaning that it still activates lights as per the last settings but no automation or notification will work which in my case the garage door opening won't trigger the lights to come on and it won't send me a notification someone is out the front.
So to fix this is really simple, you just need to go to your electrical switchboard and find your light circuit breakers, turn them off for 5 seconds and then back on. Give it a few minutes and then click on your device and under settings click on network connectivity and do a test. It should connect now.
