Need help understanding the TX part of the code

[HTerminal]

Hello @davidnnaji
Thank you for making this project open-source.

I am also trying to achieve the same with ESP32. connected to an RS485 Trasnreciver ic with a NOT gate on the TX pin.
As I am following your code to write the code for ESP32 but I am unable to send the MID successfully.

I am using a Simulator for the same. Which says invalid data packet length.
Can you please explain what am i doing wrong?

When I am sending a MID 0x77 the simulator is interpreting it as 0x88

Also, can you convert the same code for ESP32 if possible? It would be a great help.