I recently switched my electricity contract from fixed to dynamic pricing. A large consumer is a boiler that provides warm water for 1 to 2 days. Thanks to its smallish volume and high power, it will heat up from cold to hot in less than 1 hour. Coincidentally, the current dynamic electricity pricing of Nord Pool is set in 1-hour intervals.

I got a Shelly Pro 2, upgraded its proprietary firmware to 1.3.0 and further to Tasmota 14.1.0 using these instructions. Power1 drives a 3-phase contactor that drives the 3×2kW water boiler resistor through a thermostat. Input 1 is wired to a signal “night time electricity tariff is available”, which I do not currently do not use. The Tasmota configuration is as follows:

Here is the link to the package and tutorial – https://sparkleotech.medium.com/a-guide-to-achieving-seamless-ota-updates-for-esp32-with-the-flutter-ota-package-eb48f4a66870

Here is the link to the package and tutorial – https://sparkleotech.medium.com/a-guide-to-achieving-seamless-ota-updates-for-esp32-with-the-flutter-ota-package-eb48f4a66870

All the relevant materials can be found here,https://drive.google.com/drive/folders/1_WMghH4jjUBSKPrAPsSkdRohmSP-RuI8

You can easily download the mobile application on playstore via this link, https://play.google.com/store/apps/details?id=com.broxcode.arduinobluetoothfree

Just as Magnus Emenuga have assembled this project using the design information,you can easily use the comments attached to the Arduino code and the schematic diagram to make your own assembly and understand further the internal logic of operations.

Like always, feel free to reach out, if you need further assistance on this build, or other projects we have as open source on our YouTube channel here,
https://youtu.be/TcSqw4muLIE

#design #opensource #homeautomation #arduinoproject #embeddedsystems