On this Arduino model it was approximately 360 call to this function.Ĭode I used to use up all the addresses. By incrementing the argument in the recursion, I could see how many times the recursion occurred before the Arduino reset. I built a small function that has 1 argument and 1 local variable. I tested this on my Arduino UNO WiFi Rev 2. If (a > 10000) return // how to end the recursionĮach function call consumes some of the Arduino’s memory once the Arduino runs out of memory for functions it typically resets (as if the external reset button had been pressed) and runs setup() again. Recursive loop - a function that calls itself A recursive loop of functions is the most likely way to reach this function limit. Having functions with more local variables, or larger local variables, decreases the number of function calls that can be made before the Arduino resets. From an experiment conducted, this can occur after roughly 300 function calls. Calling too many functionsĬalling too many functions, such as in a recursive loop, can cause an Arduino to crash and reset. I put together the results of these experiments as a guide on how an Arduino crashes or hangs, and how you can prevent this happening to you. To help anyone prevent their Arduino from crashing or hanging, I ran a series of experiments to determine all the ways an Arduino can crash, hang, reset, freeze, stop running code, or do something strange.
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