RNTLab.com

The Ultimate Shortcut to Learn Electronics and Programming with Open Source Hardware and Software

OTA Updates undefined reference to `app_main'

Q&A Forum › Category: ESP32 › OTA Updates undefined reference to `app_main'
0 Vote Up Vote Down
Jean Pierre Daviau asked 5 years ago

Hi,
About the course
https://randomnerdtutorials.com/esp32-over-the-air-ota-programming/
 
When I compile, I  have a        undefined reference to `app_mai n’

I don’t believe it ,  this occurs when there is a problem with the code. 
One time there was a useless H file in a folder and I got that  complain.  I compiled many ‘certifiedbyme’  codes and everything is OK.
 
 
Did you have any complain about that?
 
 
Regards,
 
 
JPD

4 Answers
0 Vote Up Vote Down
Jean Pierre Daviau answered 5 years ago

Solved
10uF  between EN pin and ground.

0 Vote Up Vote Down
Jean Pierre Daviau answered 5 years ago

Hi,
 
 
Is there a minimal sketch to upload a squech  with OTA?
 
Regards,
 
 
JPD
 

1 Vote Up Vote Down
Sara Santos Staff answered 5 years ago

Hi.
I’m sorry for the delay in my response.
That code compiled ok for me.
The only example we have about OTA is precisely that one: https://randomnerdtutorials.com/esp32-over-the-air-ota-programming/
Regards,
Sara

0 Vote Up Vote Down
Jean Pierre Daviau answered 5 years ago

Thank you, I found my mistake.