@omemanti @mfalkvidd Thank you, I think I did it. It works now - or I hope so from the code.

** Programming Finished **
** Verify Started **
nrf51.cpu: target state: halted
target halted due to breakpoint, current mode: Thread 
xPSR: 0x61000000 pc: 0x2000002e msp: 0x20004000
verified 1412 bytes in 0.038633s (35.692 KiB/s)
** Verified OK **
** Resetting Target **
shutdown command invoked

What I was confused is that there is erase sketch, but to make it erased there is this trick with burn bootloader. Still the port is greyed out, but it seems I am able to flash blank sketch. Thanks

1. I've downloaded the source files and tried to compile them.
   I got fatal error: sketch/MyBoardNRF5.h: No such file or directory

2. Then I renamed MyNRF5Board.h to MyBoardNRF5.h
   I got #error No forward link or gateway feature activated. This means nowhere to send messages! Pretty pointless.

3. Then I added #define MY_GATEWAY_SERIAL into the code
   I got many errors i.e. 'PIN_AIN0' was not declared in this scope

How to compile the downloaded source files?

I am starting to experiment with NRF51822. Thank you all for this thread. I am stuck with setting up IDE on Win10 and my MCU is not communicating. What is the correct setup for Arduino IDE?
I have Port still grayed out and error: The selected port not exist

Could that be related to drivers? I've run Zadig, there are more options and I've tried all four of them

I am not able to upload even erase sketch. Any suggestion where to focus (IDE/Zadig/other)?

Same by me - combination of Rapberry 3 + mosquitto + OpenHab2. 2.1.1. doesn't start at all (TSM:INIT:TSP FAIL), 2.2.0 beta starts without troubles but after a few minutes the communication is lost (!TSF:MSG:LEN,0!=32). Have capacitors on the node and gateway.

In my case the problem is related to MQTT gateway, so not sure if that helps.

Try to install version 2.2.0 beta, this helped me and it is described in other post. The gateway still may be unstable but not only I don't know why 2.1.1 doesn't work.

I am experiencing the same behavior. 2.1.1. radio is not detected. 2.2.0 beta detected ok.

The programmer has 10 pins but the GND is presented 4x. Check the picture [here](http://www.avrfreaks.net/forum/adapter-program-10-pin-6-pin-socket-cable-computer-pc-led-reset-power for wiring, this is how I did it.

I just have this problem with "programming" solved. I bought this USBISP programmer, downloaded libUSBk drivers from here and pushed it into SBmicro via programmer USBasp. I don't know why but from some reason two UART programmers were not working.

It may save frustration and time to somebody in future.

10 Pin Cable USB ATMEGA8 ATMEGA128 USBASP USBISP AVR Programmer Adapter Arduino

$1.67

574 available

Unfortunately I didn't solved it, I just gave it up and am waiting for new ISP programmer to arrive. That is the last piece I didn't changed (I have changed computer/SW, sensebender Micro and it didn't helped). Hope you will be more successfull.