@acb Nice! I have serious board envy. I really like that clip on programmer too.

Has anyone been able to do OTA programming with the STM32 yet?

@mfalkvidd Thanks for doing this kind of work (deleting fake users and stopping spam). I am sure it is not as much fun as answering real questions about MySensors topics. But I learn so much from people in these forums, that I would hate to see it overtaken by trolls and spam.

One problem with the STM32L devices is there do not seem to be any low cost dev boards available. If there were something like the blue pill, but with an STM32L, and it had arduino support, then adding it to MySensors would be worth the effort.

A very interesting board is the AI Thinker RHF76-52. This has a SX1276 Radio (which MySensors could support with the RFM95 protocols) and STM32L05 processor on the same board. It could be a relatively small and cheap STM32L Lora board for MySensors with the right programming. But the STM32L05 does not seem to have any arduino support, so you have to program that even before you add the MySensors programming. Possible, but a lot of work. If someone knows how to program the STM32L05 with arduino, please share it. That seems like the first step to making the RHF76-52 a good MySensors board.

Yes. sleep() gives a return code you can use. See the discussion in the API page here:
https://www.mysensors.org/download/sensor_api_20#sleeping

Nice board. Have you run it on battery? How is the power consumption?

I have seen domoticz not add a device to the list until it actually sees some value from the device (not just presentation). Might be what happened.

I'm in the northeastern US. The meters use a variety of standard protocols. I think bemasher did a lot of work to reverse engineer them ( https://github.com/bemasher/rtlamr/wiki/Signal-Processing ), but now the work is done for all to use. The hardest part was sorting out my meters from my neighbors -- really.

MySensors has way better security : )

It isn't a MySensors based solution, but I am reading my meters using rtl-sdr and a raspberry pi. It reads the signal used by the utility company for reading the meter. See this link:

https://hackaday.com/2017/12/21/read-home-power-meters-with-rtl-sdr/
and this one:
https://github.com/bemasher/rtlamr

I was lucky and my water, electric, and gas meters can all be read by the rtlamr program. It is not good for instant reading of the rate. I take a reading every hour and then subtract from the last hour to get an average usage for the hour.

Also, search in the forums. There are a few threads about reading meters using MySensors and detecting LED blinks or hall effect.

Check out Felix's switchmote series at LowPowerLab:
https://lowpowerlab.com/shop/product/128
I have this switchmote that has been bulletproof. It only has one relay and it is Moteino (RFM69) based.
He has a 2 relay version of the PSU:
https://lowpowerlab.com/shop/product/127
Even if it is not what you are looking for, it it a nice design to study.