ESP8266 Community Forum

Hello,

I'm developing a sensor platform using ESP-NOW protocol. I started using WiFiEspNow library but at some point I decided to use plain sdk functions.

Node and gateway code works fine, so I wanted to cleanup code before going on.

When I remove `#include <WiFiEspNow.h>` line I get random crashes both on gateway and sensor node. I've double and triple checked that there is no reference in my code to it, and looked inside library files for anything that can cause this problem. Sincerely I do not understand this issue. It is an X-File for me.

This is one of the crash dumps I get:



I am confused about LoadStoreAlignmentCause. All buffers are accessed as uint8_t pointers and managed with memcpy.

I have my code on Github https://github.com/gmag11/ESP-NOW-sensor/tree/master/espnow_sensor. In order to reproduce this problem only sensor code is needed. Just comment first line on `espnow_sensor.ino`. If that line is active it woks perfectly.

I'm using Visual Micro to compile this project, but Arduino IDE results the same behavior.

I have absolutely no clue about what can be the reason. Any advice will be helpful.

Thank you

You have to include the library header line `#include <WiFiEspNow.h>` in order for your code to use these files. There's must be some function, your code is using from that library.

Sometimes, it happens that Library A is dependent on Library B so you are not directly using Library B in your code but in order for Library A to use it you have to include Library B. I hope you understood the concept. Arduino IDE is better option though. https://www.theengineeringprojects.com/ ... tions.html

Finally, I found the problem.

It was related to a debug string whose length was not controlled. This caused accesses out of allocated memory.

Most probably, including that library made that writing into that address was not harmful because its functions were not used.

I've learnt something new

Regards