Which are the supported peripherals for measuring the mains voltage ?

[dugolf]

Domoticz V3.7602 on raspberry
RFLINK V1.1 R46 with 433MHz

I want to display the main voltage (230V). Which are the supported peripherals for measuring the mains voltage ?

[costo]

I use a Sonoff-POW to measure the main voltage. As a bonus I can measure current momentary power(Watts), cumulative power usage (Wh/kWh) and can also control the internal relay with Domoticz.

But this device ´cannot´ be flashed with ESPEasy nor will it work with RFLink but Domoticz can work perfectly well with this device when it is flashed with Espurna firmware.