You might be interested by the board I've designed. Not "RF Nano" but "RF Pro Mini". Of course you need a "USB to serial" programmer but it directly runs on batteries.
See here and here.

thank you! this is a really good question. I now understand why you didn't incorporate the radio module. Is it the only reason? Have you investigated ways to certify a product? It is a pity if you can't incorporate the radio but we need to add extra modules that are probably not certified either. I am not willing to become a vendor (just providing a design and a few units). In that case, I don't think I need to make any measurements. Of course if one wants to go further in the industrialization process, it is a mandatory step.

I understand your point. But in the end almost everybody uses non certified radio parts. And a lot of users around here are frustrated because of the hardware issues due to bad radios. That means a lot of wasted time, also for the helpers.

So what do you think of the cheap radio modules? Are they certified? Some are sold by sellers based in Europe. Is all this illegal?

thank you! this is a really good question. I now understand why you didn't incorporate the radio module. Is it the only reason? Have you investigated ways to certify a product? It is a pity if you can't incorporate the radio but we need to add extra modules that are probably not certified either. I am not willing to become a vendor (just providing a design and a few units). In that case, I don't think I need to make any measurements. Of course if one wants to go further in the industrialization process, it is a mandatory step.

thank you! this is a really good question. I now understand why you didn't incorporate the radio module. Is it the only reason? Have you investigated ways to certify a product? It is a pity if you can't incorporate the radio but we need to add extra modules that are probably not certified either. I am not willing to become a vendor (just providing a design and a few units). In that case, I don't think I need to make any measurements. Of course if one wants to go further in the industrialization process, it is a mandatory step.

You might be interested by the board I've designed. Not "RF Nano" but "RF Pro Mini". Of course you need a "USB to serial" programmer but it directly runs on batteries.
See here and here.

Hi! thank you for the answers. I personally have the expertise and I am able to solder. I was thinking of people who just have basic or no knowledge about electronics. It is always a pain to get a working initial set up. In case of communication issue (which is always the case at the first try) you never know where it comes from. Is it the node? is it the gateway? is it hardware? is my code correct? is my power supply correct?
So I've decided to design a minimalist board that embeds an ATMega328p low power and an nRF24L01p: just the bare minimum. The purpose is to provide a functional board that works for sure out of the box. Actually it is an Arduino Pro Mini fitted with a radio module. The pinout is 100% compatible with Arduino Pro Mini. Users won't have to spend time on assembling the parts and testing the radio, they can directly focus on their sensor.
Design files are available here.
I also created a kickstarter just to see. You can buy one or more units and support the project if you are interested.
I don't know much about openhardware.io but I guess I can share my project there as well.

Hi,
Thank you for what you are doing. MySensors is great!
But to me it sounds a bit to difficult for people who don't know very much electronics.
Their only alternative is to go for a commercial solution. Seems there is not much in between.
In your presentation page, you wrote : "we are working on launching our own set of sensor modules and boards to ease the build process even more"
Any progress on this? would be nice to get sensors ready to use out of the box. Or at least ready with minor operation...
Do you still plan to release your sensors? and what timeframe?
Bye!