When comparing Arduino Uno R3 vs Sparkfun SAMD21 Dev Breakout, the Slant community recommends Arduino Uno R3 for most people. In the question“What are the best development boards?” Arduino Uno R3 is ranked 1st while Sparkfun SAMD21 Dev Breakout is ranked 4th. The most important reason people chose Arduino Uno R3 is:
Unlike some cheaper clones, this board is very capable of running continuously for long periods of time with no issued.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Reliable, even for long periods of time
Unlike some cheaper clones, this board is very capable of running continuously for long periods of time with no issued.
Pro Cortex-M0 Processor
Run out of room for your program on your Arduino? You can use this.
Pro Arduino Compatible
Have Arduino shields you want to use? You can.
Cons
Con Advanced users will find it's insufficient
This board is very good for beginners, but once users start getting more experienced, they'll feel that what it offers is insufficient.