Hello all,
Thank you for all your responses. I progressed on the matter yesterday night at home. The board at home actually connects to the wifi but it takes an insane amount of time! I made multiple runs and it connects each time, after a delay between 4 and 12 minutes! So it appears using the hardware button was just shortening this waiting time to a reasonable amount.
The issue seems to be different at work, as I can not replicate the same behavior. While using the corporate wifi or my phone as Access Point. So my quest is not over 
.
In order to respond to all your suggestions:
- @PJ_Glasso: Because I discovered that effect and was focuse don it, I didn’t try the WPS button yet
- @PJ_Glasso: Yes, the antenne is attached properly. The board at home is about five meters from the Access Point with only a wood pannel between them (RSSI -63) and the board at work is maybe ten meters away in direct line of sight (RSSI -52 using my phone).
- @cgwaltney: No SD attached but there is stuff in your code I wanted to use for debugging my issues (using a NTP server for logging in long runs for example). Thanks for it!
- @PJ_Glasso: Flushing serial doesn’t seem to improve the issue for now
Martin.