Hi – (following from a previous post Help with strategies for recovery from power failure)
The saga continues and now I would like to pick the experts brain again for some strategies to cope with different modules taking different times to power on.
One specific problem area is if the router/modem comes up last.
The HA instance (2023.12.3 running on a Raspberry Pi 4+) is using Duck DNS and ‘Lets Encrypt’
Those modules inform the Duck DNS server of the new external IP address - usually.
BUT if the router is not up yet then a) it cannot even get the new address b) has no path to post it.
It didn’t recover from this when the router did come back so there was no external access to HA until I could get home and force a reboot.
Does anybody know if this can be configured to keep trying for IP address change?
For other Dynamic DNS scenarios I use No-IP and this updates the IP automatically from the modem itself. I would use this except they want too much for a certificate, which seems to be mandatory for something - probably Alexa
Secondly does anybody know of products that will enable devices to powered up in a specific order?
Thirdly, I tried, unsucessfully, to get the main HA Raspberry to communicate with its slave WITHOUT using the router by using static IP addresses. I think its called level 2 of IP. The two devices are both plugged into the same gigabit switch and that should be enough to do its basic functions but something couldn’t cope.
Maybe MQTT - does that need something more?
Thanks for any help
JC