Making the ESP32 Thing Plus DMX to LED Shield (DEV-15110) Read Only

Components & Accessories LEDs
1

The end goal for my project is to plug this device into a DMX system that is used to control lighting in a Community Theater setting. Accidentally taking down the system through a hardware or programming fault is out of the question. Has anyone ever made this device DMX read only? Looking at the schematic here:

https://cdn.sparkfun.com/assets/c/1/c/c … Shield.pdf

I think it can done. Remove U4, and possible R4, jump U4 pin 6 to pin 5, and place a 10K resistor between U4 pin 3 and pin 2. For good measure, remove U5, jumper U5 pin6 to pin 8, and place a 10K resistor between U5 pin 3 and pin 2 shouldn’t hurt.

Any thoughts?

Thanks in Advance

2

That should work. No need to add the 10k resistors, and for U5, no need to jumper 6 to 8 as R5 will already pull the input high.

/mike