I did not know, that such initialization may be required for some units.
I found video that shows dongle initialization.
@plains203 , your unit is also require such initialization?
If ESP has enough time to boot, check MQTT logs before enabling in
mosquitto_sub -h 192.168.1.100 -t fujitsu/# -v
When ESP shutdowns, if you reconnect it - it keeps running for 60 seconds again or you have to reboot AC first, to get power for ESP again?