To send frequency of power line we do not have any field (as per my knowledge). I hope V_FREQUENCY will be a suitable field for sensor variable type. For sensor type we can use S_POWER
NRF24L01 module help for IoT project!
Ethernet/WiFi-Client Gateway enhancement
Water leak sensor
Motion sensor increase Time high status via software
NRF24 Radio Recouperation feature
idea: depositTime (opposite of requestTime)
multiple sensors via nRF24L01 --> ESP8266 (gateway) --> MQTT --> GCP (google IoT)?