No practical experience yet, but I have two nrf51 waiting for me to play with. I have been following this thread where I have learned a lot. Seems like a great chip at a nice price.
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The Nordic nRF51822 is on the popular micro:bit (http://www.microbit.org/) and a similar project in germany the calliope mini (https://calliope.cc/), so there should be code examples and such to be found.
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Sure nordic chips are quite popular, question was rather related to that specific module.
@BoRRoZ I do! I have one for work on my desk right now, and it works great. A client of ours is embedding one on a BLE/IR remote.
You might wait to get a dev kit because you’ll need a SWD probe anyway.
The Nordic SDK is a bit… weird. It’s pretty good, but it gets some getting used to.
How about (I guess fake) Digispark Kickstarter ATTINY85 Arduino IDE compatible boards, no USB-serial converter required for €0.89 each? These are convenient for disposables, garden scares for Halloween maybe? Handy to have like a box of RGB LED’s, you never know when or why one might need these!
Garry
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100 % 
- Sleep Modes on ATTiny85 – Renewable Energy Innovation
- Plant Moisture Monitoring - Hackster.io
- NerdKits - OneWire DS18B20 Temperature Switch on ATtiny85 (Microcontroller Programming)
- Arduino and ATtiny85 projects: RGB-tiny: RGB Led controlled by ATtiny85
- http://www.instructables.com/id/ATTiny85-connects-to-I2C-OLED-display-Great-Things/
- Attiny85 DHT22 Temp/Humidity logger - Everything ESP8266
- http://www.instructables.com/id/Use-ATtiny85-with-I2C-EEPROM/
- Projects from Tech: Serial Communication on a ATtiny85 with the SoftwareSerial Library.
- ATtiny85 Real-Time Audio Pitch Shifter « Adafruit Industries – Makers, hackers, artists, designers and engineers!
- http://www.rudiniemeijer.nl/lora-kpn-en-the-things-network-met-attiny85-en-rn2483/
- GitHub - konspyre/TinyMotion: A low power, remote motion sensor. Based on the 8-pin AVR ATTiny85.
I ordered 10 more of these Digispark boards, I am down to my last two. I managed to brick one yesterday flashing a new bootloader. Default has a 5 second pause on boot in case the micronucleus programmer needs to flash a new sketch. Seems the binary I found isn’t the stable version. Windows doesn’t see the hardware now. What a waste of €0.89!!!
Keep up the good work, phenominal amount of info onmthe forum. I have parts ordered for a home made 1/4 wave ground plane antenna. How did testing go? Any other hints?
Thanks
Garry
in the category ’ wtf’ is that ? a lorawan gateway pcb with hdmi output … oh, and its not a bargain
LOL… LoRaWAN gateway as a marketing/SEO gimmick.
Maybe it’ll show up in fridges and vacuum cleaners soon.
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Isn’t this just what everyone builds here? A RasPi-ish device with a concentrator board on top. Most hobbyist gateway probably have HDMI out that way too 
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US $6.29 incl. shipping
nice lan adapter for Pi zero
US $12.34 incl. shipping - I ordered one to see if it can be used
* and suddenly the price went up to US $14.75 
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