I'm having difficulty connecting an I2C LCD display to TM4C123G. I'm trying to connect it to J14 on the Grove Base BoosterPack. I've visited the page you've linked - yet cannot (easily) find the "J14" ...
THIS CODE IS OBSOLETE * It needs to be updated to be compatible with changes to the ESP32 standard libraries. Also, if fine granularity control is required, it needs to use long int arithmetic instead ...