I have spent some hours yesterday evening evolving my Home Automation Solution.
Porting some code developed for the Arduino MKR1000 on an Arduino One (a clone) board, I hit a strange problem: the sprintf function was not working as expected.
Strange, at the beginning I thought. Unbelievable.
I made resort to the skills in C development built 25 years ago. A step-by-step debugging of few lines of code.
Then, after some googling, I discovered what the problem is:
MKR1000 is a board with a chip from ATMEL that is 32bit. Arduino Uno is NOT.
On many "so-constrained boards" the C standard library has limitations introduced to reduce the memory footprint. Especially regarding floating point numbers.
sprintf has one of these limitations.
Resorting to another function provided by ATMEL I resolved.
But the important point is: if it is embedded it has constraints. Limitation.
It is not a smaller version of an Intel chip (the one that you have on your MacBook).
And we must be aware of this.
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