Sunday, 7 October 2018

ESP8266 IoT AC Mains Power Extension Part 2 of 3




ESP8288 ESP-01S IoT AC Mains Power Extension, shown with light bulb in E27 adapter
Rather than building separate Internet of Things (IoT) lamps, TVs, speakers, etc I found it much more flexible to make an IoT power extension. This lets me test the various IoT devices at leisure.

In Part 1, half the space is taken up by the IoT power supply. Here, in Part 2, is a proper 1-gang IoT AC mains power extension using the ESP8266 NodeMCU ESP-01S and a very handy 700mA 5V AC mains power supply.


5VDC 700mA adapter from 220VAC 
I bought mine from autobotic at lelong.com for about RM7 each. They were so handy I actually bought up all the available stock in Malaysia (sorry). The 5V 1A version is over twice in size and not as useful.

Assembly is straightforward. The power socket fits nicely over the power module and the ESP-01S relay modle without coming into contact. Note the cable ties to hold the modules in place
Assemble is simple. Note the cable ties used to hold the modules in place. This is advisable as there is Live voltages on the power board and you do not want them in contact with the other bits. The modules should not be exposed from the bottom either, as some of the holes there are quite large.

You may need to drill a hole in the side for the power cord, and maybe enlarge the various holes in the bottom enclosure to fit your cable ties.

Assembled IoT mains power extension
There you have it, a proper IoT AC mains power extension. In Part 3 of this series I hope to detail how to remotely control it from your smartphone or your Google Home smart speaker.

Happy Trails.