A 4-Channel mains sensor with an option for either a Wemos D1 Mini or an ESP-12 WiFi module
Using the an external A/D ADS1115 to measure the output of the current transformer, this version measure the peak values of the mains sine wave then calculating the RMS voltage value.
This is based of the EmonLib https://github.com/openenergymonitor/EmonLib library. This works different from version 1 and as some digital filtering which improves resolution at lower power levels.
