That means there must be NO use of delay () and NO use of a FOR or WHILE that takes more than a few microseconds to complete. This is an example of why blocking code should be avoided in your loop().Īdding a yield() to the while loop "fixes" the WDT timeout, but the correct fix is to not use blocking code in the first pace. You need to write code that allows loop () to repeat hundreds or thousands of times per second. In the void loop (and any function called from the void loop) you don’t want to block the execution of the code too long, especially if you plan to do some kind of multi-threading with your Arduino. Hardware MKR GSM 1400 with Arduino SIM MKR ENV Shield Antenna and LiPo battery Scenario will use the MKR ENV to monitor an item I'm shipping via UPS. The watchdog is reset every time loop() runs or you call delay() or yield() but if you have blocking code like the above then the watchdog may time out, resulting in a reset. Don’t bloat your void loop, just as you don’t bloat your main in a standard C/C++ program. Hey y'all I'm super new to Arduino and coding but am really close to getting my basic use case up and running I just need a little assistance on the code to trigger a sensor read every 15 minutes instead of consistently as I have it now. If the watchdog timer isn't periodically reset then it will automatically reset your ESP. Certain things do go on while the delay () function is controlling the Atmega chip however, because the delay function does not disable interrupts. Why? The ESP is a little different than the standard Arduino boards in that it has the watchdog(WDT) turned on by default. More knowledgeable programmers usually avoid the use of delay () for timing of events longer than 10’s of milliseconds unless the Arduino sketch is very simple. I rewrote your code: unsigned long timeNow While() is blocking code and you should try to avoid using blocking code in the loop(). It is not intended for a one-time operation. A while loop says to do something over and over, until a condition is met. delay() Arduino Function: Tight Loops and Blocking Code. Timing should always be handled with subtraction to find intervals. I want to write a while loop that gets activated and runs only once when I press a push button connected to a digital pin something like 'wait for push button and when activated do the rest'. Read How to use this forum and post your sketch using code tags.
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