Category Archives: Myha

bathroom-touch-switch-installed-2

Having previously created a Border Router and a Six Channel LED Dimmer for my custom Myha home automation system, the next item on the list was to create a Myha version of the touch switch that I’d previously made for the Rako system. This was actually the third version of the touch switch as I’d made two Rako versions, the first using an official Rako switch contact module and the second communicating directly over the air after I’d reverse engineered the RAKO protocol.

As this was version three, the bulk of the hardware design was already fairly well proven and little had to change, mostly it was just a case of changing the radio and firmware. However, this was the first version to be installed in a wall, and this is where a few surprises were to be found.

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ha-6ch-dimmer-assembled-front

At the beginning of the year, when I sent off the Raspberry Pi 802.15.4 Radio design to Smart Prototyping to have the PCBs manufactured, I also sent off the design for the second Myha home automation device, a six channel LED dimmer that’s intended to control my bathroom light. Unfortunately this design wasn’t quite as successful as the radio interface. It works well enough that I can still use it, but more through luck than anything else.

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ha-raspi-radio-installed-1

Shortly after creating the Contiki/Zigbit home automation proof of concept over Christmas, I laid out a 802.15.4 radio interface PCB for the Raspberry Pi and sent it off to Smart Prototyping for manufacture. With this interface and the 6lbr router software I can turn a Raspberry Pi into a nice small, self contained Ethernet to 802.15.4 border router, which will form the heart of my new home automation system.

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As I’ve been making more custom automation devices, I’ve come to the realisation that I don’t actually have to be restricted by the limitations of the Rako protocol. I could start again from scratch with my own custom protocol and have no restrictions at all.

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