@fanfan nice! How is the signal compared to stock nrf24 modules? How much for antenna?

@acb we can continue discussion in this thread, If you want: https://forum.mysensors.org/topic/6961/nrf5-action/

So as I understand for now you are using native SDK and not using Arduino and mysensors? As far as I know arduino's core for nrf5 has no support for bootloaders, and mysensors conflicts even with softdevice being present on a chip. And it seems that sandeepmistry (author of the core) isn't going to invest his time into writing bootloader and can't use nordic's one because of license. I would like to have a bootloader solely for bluetooth OTA programming for projects beside mysensors. Maybe you could share your work, and/or write some kind of brief tutorial on where to start working on this subject maybe to avoid problems you have already solved? Anyway, great work from you, hope someday we will have mysensors on nrf52 with working OTA.

@acb have you written a bootloader yourself, or found already available? Can you tell more about it and a board you using to connect nrf52 to FTDI?
Nice work!

@alowhum but why, if for the same price you can get nrf52832 or 51822? Smaller, more RAM more flash, less consumption...

@heinzv please be advised that 52840 is not yet supported and I didn't come across any timeframes for releasing support for this chip.

@ncollins have you tried this: https://github.com/AndruPol/nrf52832-recover ?

@rozpruwacz well, I've looked at mysensors code sometime ago, when was testing it with nrf51822, at first it looks complex and scary, but when you look closely you can sort out what is going on there. I guess adding sleep function won't be too hard. I believe there is plenty of available code for stm32 and arduino. You just need to adapt it following the logic of sleep function mysensors provide for other platforms.
To be honest I don't know why it isn't implemented yet, maybe someone from core developers can shed the light on this topic, maybe there are some troubles, but I guess it just absence of interest.

@stephen-albright to do the fisrt thing you need a simple flow meter like this:

For the second task I have doubts that there is available and affordable solution. At least I've never heard of something like this.

For the third task you may use something like this:

or this https://store.fut-electronics.com/products/under-water-depth-sensor

@rozpruwacz one answer would be "Are you yourself willing to work on this stuff?" Being community project means that people from this community maintain the code and add functionality. So basically the most interested in some function member will write it and the rest may help to improve it.