Latest screenshots for version 32 of ESPproMon below.
In the LOG tab we have added basic logging details. When the Pzem is installed in your consumer unit or if you are connecting the Pzem directly to the RX and TX pins, Serial Monitor logging is not available.
The red button shown as OFF is for a relay connected to D1 (GPIO 5). You can change this to a pin of your choice. To the left of the button is the Eventor widget where you can schedule events and notifications. So if power goes above say 4000 Watts you receive a PUSH message / email etc. Eventor has a very useful scheduler too so you can trigger relays at certain times of the day.