Bytes field between Python and C (Nanopb)

[Renaud Piperade]

Hello,

I am trying to use Protobuf between a C99 program (with Nanopb) and python3.9.2 program. The communication take place through a serial port communication (with pty under a Debian machine).

I have the following message:

syntax = "proto3"

import "nanopb.proto";

message My_msg {

    uint32 time = 1;     

    bytes data = 4 [(nanopb).max_size = 255]; 

}

I am facing an issue with the bytes field. Does someone know how to "read", "write" and display the "data" variable on python and C (with an example with this message can help me a lot) ?

Thank you by advance,

Renaud

[Deanna Garcia]

Bytes fields shouldn't be any different than other fields. You should still be able to get and set the variables as explained in the tutorial.