Teensy 4.0
IDE installation
- Download & Extract Arduino
- Install udev Rules
- The udev rule file gives non-root users permission to use the Teensy devices (serial, HID, etc). More Linux tips below.
sudo cp 49-teensy.rules /etc/udev/rules.d/
SDIO 4 bit
- Format SD before running
- Change pin define
- SD.begin(BUILTIN_SDCARD)