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Amazon.com: Waveshare Atmel-ICE-C Debugger Programmer Powerful Development Tool Atmel SAM and AVR Microcontrollers Original ATMEL-ICE-PCBA Inside Durable Aluminium Alloy Enclosure: Computers & Accessories
![gojimmypi on Twitter: "Yes, initially I thought it was because I tried to program with @visualmicro extension to VS, but no: programming from the Arduino IDE caused the same problem. The hub gojimmypi on Twitter: "Yes, initially I thought it was because I tried to program with @visualmicro extension to VS, but no: programming from the Arduino IDE caused the same problem. The hub](https://pbs.twimg.com/media/ErZddcgVQAApJrT.jpg)
gojimmypi on Twitter: "Yes, initially I thought it was because I tried to program with @visualmicro extension to VS, but no: programming from the Arduino IDE caused the same problem. The hub
![Unable to program ATSAML21 PCB via SWD - Problem with connection? - Electrical Engineering Stack Exchange Unable to program ATSAML21 PCB via SWD - Problem with connection? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/eJ4aR.jpg)