Bali in February for the win!

I often think about upgrading my heating system controls. I have hot water heat, which is not common in the US except in the northeast. And, of course, the US uses different standards, so when I see an interesting TRV, it is for the European market and won't fit my radiators. They are available, but expensive . ....
I have thought about some MySensor controlled devices that would electronically turn the manual valve on each radiator. I bought some cheap worm gear motors for that purpose, but they are still sitting on my workbench. Hope to find time for that project before heating season starts again.

Depending on what sensors you are using you may be able to just power your nodes from battery.
I have MySensors nodes that report temperature in different rooms of my house that will run 2 years on a set of 2 AA batteries. You would not need any type of UPS for the nodes in that case.

See this link for info on how to get good battery life from a MySensors node:

https://www.mysensors.org/build/battery

Clever. I have a bunch of circuit boards stuck to the back of battery holders using hot glue. This looks much better.

@sundberg84 Nice. I was wondering if I had an use for these. Now I want them everywhere!

I've been thinking about trying to make a dimmer using this chip:

https://www.digikey.com/product-detail/en/on-semiconductor/FL5160MX/FL5160MXTR-ND/6126507

It does the heavy lifting on the zero cross logic and claims to be good with LED bulbs. It's meant to be very easy to make a potentiometer controlled dimmer, but if you can provide a variable voltage signal, you can control it from a microcontroller.

I have been meaning to get one and experiment with it, but I've been more focused on learning how to use NRF5 modules at the moment.

@nca78 I downloaded the latest update to VisualMicro last night and had mixed success. I can now pick the MyboardNRF5 boards, but run into a compile error where it cannot find the build directory. Have you tried it yet?

@alowhum Reset seems unlikely. Maybe SWIM. You could try it.
If you can follow the trace back to the microprocessor, then you could figure out which pin it is. Then you could change to that pin in the BMP files, recompile, reload . . .. . Not sure it's worth all that experimentation when you can just use an FTDI as @NeverDie does.

@alowhum I'm using a BMP that I made from a STM32 Blue Pill. The Serial works just fine.
Set a TX pin on your NRF5 in the MyBoardNFR5.h file. Connect it to the RX pin on your BMP. The default pins are TX (PA.2) and RX (PA.3). So if you connect PA.3 on your programmer to the TX pin you select on the NRF5, you should have what you need.
To program, select the lower number serial port.
To see serial output, select the higher number serial port for your serial monitor.

@nca78 I posted to the VisualMicro forum. They responded right away. They are going to fix it in the next release. Something to do with internal naming conventions.