Sometimes it’s hard to know where to start with getting devices working on a new platform, like I2C keypads, sensors and screens: here’s a writeup that provides some sample code to nicely interface plug-n-play SparkFun devices with a custom OS (NetBurner’s RTOS) with minimal reimplementation work. Would be similar for RT1062 devices like Teensy 4.1:
Welcome to the Technical Forum. Thank you for the suggestion. This will be useful.