4ZeroBox Serial lenght data

Hello everyone.
I sould get some date from uart serial with .read() or readline() functions, but theses functions only get some chars after about 100.
So, the func serial has the param rxsize and txsize, however these value are 0, 256,512… I connect the device who’s send 12 HEX varieble, but 4zerobox dons’t recive each HEX. It’s recive 120 HEX.
How can I fix this? I want to recive each HEX separately.

If you mean you want to recieve 12 bytes, you can use the read() method.
It takes the number of bytes as an argument.
You can use it to read only 12 bytes.

let me know if I understood you correctly.