I set up an NRF52840 on MySensors by programming it like it was an NRF52382: Arduino IDE, sandeep's libraries, using the MyBoardNRF52 board type. I ran a MockMySensors sketch and it worked.
I haven't played with it beyond that. I'm not sure of that would give you any advantage over just using an NRF52. It wouldn't let you use any of the new pins or other new features of the NFR52840, at least not without some programming.
I recently upgraded my NRF24 serial gateway from 1.5 to 2.3.0 and did not have any issues. I upgraded my RFM69 gateway a while ago with no issues. If it is RFM 69, check the frequency because MyConfig.h will have gone back to the default (I use 915 mhx which is not default). Do you get any error messages? Maybe one of the more experienced MySensors users could help with those.
The 300kg might be a challenge. It seems most ali express load cells are aimed at light weights, or weighing humans.
Here are some for lighter weights:
https://www.aliexpress.com/item/1kg-5kg-10kg-small-range-weighing-pressure-sensor-load-cell-set-weight-sensor-set-sensor-HX711AD/32765498523.html
Here is one for 200kg:
https://www.aliexpress.com/item/New-Arrival-1PCX-200kg-electronic-platform-scale-load-cell-pressure-balanced-cantilever-load-weight-sensor-New/32703877639.html
If you can't find one that does 300kg, you could use a lever mechanism to scale the force appropriately. I also saw some adds for custom load cells, but that is more expensive.
Look up isokinetic physical therapy machines.
They use stain gauges or load cells depending on the foce you want to measure. Expensive, but if you are studying strength of a joint through a range of motion, it might be what you want. Might be able to use one at a PT or university sports dept.
It's a breakout for a Fanstel BT832 (NRF52832). Two experiments with this board, still a work in progress:
I wondered if it would be possible to hand solder to the LGA pads on the back of the BT832 using small plated thru holes (6 solder spots middle left in the first picture). Two pads connected. The rest did not. About what I expected.
Using just the microprocessor of the BT832 to make a LoRa node. (NRF5 radio turned off). So far the Ra-01 is not initializing. Edit (10/8). The RA-01 now initializes. I needed to update the pin assignments in MyBoardNRF5.h.
@wergeld This is also my experience with Domoticz. I have not looked at the code, but I know in my installation Domoticz always asks for metric. If you ask for imperial units, it still requests metric from the gateway and does the metric -> imperial conversion in the controller.
@heinzv Yes. I'm using with Arduino IDE, but I connect a terminal program (TerraTerm) to the UART com port. You need to do more setup to get the serial out from NRF52832. The easiest way is to use the MyBoardNRF5 board type to select a pin to be TX. But that is a bit much for a blink sketch.
There is yet another usb driver for the Trace and Firmware Update ports. I forget how that is loaded (zadig I think), but you can safely ignore it.
Seems like your setup should just work uploading the sketch on your COM58.
For the GDB connection. There is a syntax difference for ports higher than 9. Try this. I had it in my notes, but haven't tried it since my ports are less than 9.
"target extended-remote \.\com58"
@heinzv For Softdevice, pick None. MySensors doesn't use the Softdevices and I don't think you want it for Generic NRF52 either.
The Low Frequency Clock depends on your board. If it has an external crystal outside the NRF 52, use Crystal Oscillator. Otherwise pick RC Oscillator to use the internal oscillator.
Your BMP ports look correct. In your setup, 58 for the programmer. Use the UART port , 51, to listen to serial debug.
The Black Magic Firmware Upgrade is for use with DFU Util to upgrade the firmware on the probe. I'm not sure what the Trace Capture is.
@heinzv I'm running a different sketch, but I get almost the same output as you except at the end: instead of "An error occured . . .":
Note: automatically using hardware breakpoints for read-only addresses.
Temporary breakpoint 1, main ()
at D:\carln\Documents\Arduino\libraries\MySensors/hal/architecture/NRF5/MyMainNRF5.cpp:23
23 {
Program complete!
There are a couple of differences.
" Sketch uses 17856 bytes (3%) of program storage space. Maximum is 524288 bytes."
Not sure why my maximum storage space would be higher than yours.
"Start address 0x2fa0, load size 18080"
Different sketch, so I would not expect the load size to match, but not sure why the Start address would be different.
On the Arduino Tools tab, are you selecting Bootloader/SD: None?
@heinzv For the NRF52832, try using the MySensors MyBoardNRF5 board type. In MyBoardNRF5.h, there is a section for the serial interface. Set PIN_SERIAL_TX to the pin you want to get serial output from. Set PIN_Serial_RX to some unused pin. It isn't used anyway. (A tip I got from @NeverDie).
I like the Black Magic Probe because it has both the SWD and Serial in one device, but you could program with the ST-Link and listen to Serial with an FTDI. I hear J-Link is the best, but have not used it. Might try it now that I know there is an educational version.