Hi, I use ESP-IDF and the Espressif-IDE (Eclipse plugin). I succesfully compiled and ran the i2c_tools example. Now I am trying to develop my own application. I have a component MPU9250 with a source file MPU9250_fckx.cpp. Parts of my code: #include "driver/i2c_master.h" #include "esp_err.h" #includ...

Thanks for your reply.

Actually the issue is SOLVED. The &lt; was in my code instead of the required < .

The error was in the blogpost from which I copied the code.

Thanks
Fred

Hi, this is probably something that happens often with beginners..... I have a code where I use: #include <stdio.h> After giving idf.py build, Ninja complains that it does not accept < It obviously does not recognize the less-than sign. I use Notepad++ as my editor. Any suggestions how to solve this...