NodeMcu to send mqtt message

Configuration
1

Hi

Can anyone point me in the right direction. We are having frequent power cuts and I would like to monitor it. My router and server has battery backup. What I want to do is plug in a node mcu to a wall socket which should send an mqtt message every 5 minutes to HA. If the power cuts then HA wont receive the message then I would know that there is no power. Does Tasmota, Esphome or Espeasy have that type of feature?

2

It should be possible using Tasmota rules.

3

For ESPHome:

Power your NodeMCU from a 5V plug pack not on the UPS. When the power goes out the status of the NodeMCU becomes unavailable. You can trigger alerts with that.

4

Espeasy can send MQTT messages as well.