Les jeux sont faits , rien ne va plus
I regret I could not rely on the built-in UART decoder - I had to write my own. Listening to the first LOW on a digital input and then counting milliseconds, around 2 for each reading, total of 32 readings.
Good work on find a solution.
However, since you have been using only a single device to produce the signal you are receiving, you need to identify how far + and - your timing can be off and still decode the bits/data from the sending unit. Only then can your solution be used in other situations and other devices.
True @Paul_KD7HB, it's a challenge to make a project like that without documentation or resources. It's like programming in blindness. I only hope the program will be robust and stable enough. I would not recommend this solution as not really scientific - but if it works everybody is happy 