Why use 2 way send data to uart but its different?

[jlian168]

Dear Sir :

Look at Pic and below :

1. The Green is send data to uart and mcu has response same data too.
2. The Red is send data to uart but mcu has not response!
3. Why? What happend!

Thank u.

[Gunner]

Without seeing the contents of your function nodes, nor what triggers the "faulty" one, all I can see is that one is a buffer and one is an array.

And that is the limit of my understanding between the two

[jlian168]

Dear Gunner :

Yeah, I see, its different...
And I use Buffer.from(array) that become ok.

Thank u.