cannot find the reason for such a strange behavior

[Alberto]

Today I have finaly found the time to implement the corrections to my code!

I have corrected the number of bytes int the array Pulse from 75 to 80. Next I have changed the following two lines of code:

DMY = W0//256
Pulse[75] = (255 - DMY)

with the simple form suggested by Richard

Pulse[75] = ~W0

Compiled (22Kb of code) and updated the mcu. Power up and checked the packet transmitted via esp NOOOO! CRC is still txed as 253 all the time!

I did change the code again setting Pulse[75] = 123 (costant value) and re-checked. Well this time CRC was txed as 123! This proved that there is no byte corruption in the code, but the problem should be in setting the byte variable Pulse[75].

So I did change the setting of Pulse[75] = 123 to Pulse[75] = W0.lowbyte. Re-checked and it worked! CRC was txed correctly!

Hence I added : Pulse[75] = ~ Pulse[75] (inverting bits) and CRC was still txed as 253!!!!

I have removed Pulse[75] = ~ Pulse[75] and kept the CRC as the low byte of the packet sum that works!

But as I stated in this thread title: "I cannot find the reason for such a strange behavior"

Alberto