espalarm Code

Prevent against json == 0

Remove unused variable

Infrastructure to keep track of network status changes

Move the check for your own replies up, avoiding some copy operations

Add comment

Minor change

Hmm, it does work somewhat if you set FreeRTOS to run on only one core

Remove the ArduinoOTA dependency (didn't work well).
Replace by something based on the OTA example in esp-idf. Doesn't work yet.
Add some comments.

Cleanup dependency on pubsubclient

Remove esp8266 code