I have successfully used the Adafruit Airlift board with Teensy 3.5 using SCK/CS/MISO/MOSI pins. I used the Adafruit fork of the WiFiNINA library (which allows one to set the MISO/MOSI/etc pins), and I am able to connect to my WiFi and then send debug messages via UDP. It works great.
So, I decided to use the Airlift for a new project using a Teensy 4.0. I used the same pin connections, I used the same Wifi code, but now the Teensy will reboot almost 90% of the time when connecting to the network, and almost 100% of the time when trying to send data. I swapped the Airlift, thinking maybe I got a bad batch, same behavior. I swapped the Teensy 4.0, thinking I got a bad batch, same behavior. I swapped in a Teensy 4.1, because I had one, same behavior. I swapped in a Teensy 3.5 running at 5v...it works great. I was thinking the issue could be 5v vs 3.3v. So I ran the Teensy 3.5 at 3.3v instead of 5v...and it still works fine.
Is there some issue with the SCK/CS/MOSI/MISO pins on the Teensy 4.0/4.1 controllers that I need to account for in my circuit? Are the pullups/pulldowns diffferent? I don't know how to account for this difference.
I apologize if this was answered in some other forum post that I just didn't find. Are others able to connect to WiFi using the Airlift with Teensy 4.0?
thanks,
-Mark
So, I decided to use the Airlift for a new project using a Teensy 4.0. I used the same pin connections, I used the same Wifi code, but now the Teensy will reboot almost 90% of the time when connecting to the network, and almost 100% of the time when trying to send data. I swapped the Airlift, thinking maybe I got a bad batch, same behavior. I swapped the Teensy 4.0, thinking I got a bad batch, same behavior. I swapped in a Teensy 4.1, because I had one, same behavior. I swapped in a Teensy 3.5 running at 5v...it works great. I was thinking the issue could be 5v vs 3.3v. So I ran the Teensy 3.5 at 3.3v instead of 5v...and it still works fine.
Is there some issue with the SCK/CS/MOSI/MISO pins on the Teensy 4.0/4.1 controllers that I need to account for in my circuit? Are the pullups/pulldowns diffferent? I don't know how to account for this difference.
I apologize if this was answered in some other forum post that I just didn't find. Are others able to connect to WiFi using the Airlift with Teensy 4.0?
thanks,
-Mark