Author Archives: koshkamau

Peacefair PZEM PC interface software (web app)

A web-app (web-interface) for Peacefair PZEM energy monitors.
It’s supposed to work on a local machine with local devices and local database.
It uses Web Serial API to connect to PZEM devices and IndexedDB to store data.

Yet another one PZEM-004T/ESP8266 energy meter.

This post describes my variant of a system that is able to store and visualize the history of power consumption of a household. System is based on “AC multifunction meter” PZEM-004T and NodeMCU ESP-12F (ESP8266) which transmits data to a remote MySQL database.

Linux, laptop and external HDMI display problem.

Not very nice workaround for a problem on Kubuntu 18.04 laptop when system doesn’t notice that external HDMI display has been disconnected if the speed which user plugs out HDMI cable is less than five speeds of light.