Bare minimum Arduino code for LCD2004 (LCD1602 with changes, etc.) and PCF8547 I2C interface chip. For when size matters. 2022-12-07 TODO: I just updated the "full" version of this code to support ...

This version intends to have full support of all LCD2004/LCD1602 features, but still has some cleanup to do. 2022-12-07 - Added initial support for GPIO mode. This was coded and tested at the online ...