Unable to send a complete string to shell prompt via Serial Interface

Hello,

I am trying to send a string command to shell prompt so that I can trigger an event.

However when I send the command, the shell prompt does not receive it exactly as I sent it.

It somehow gets formatted automatically in an order that makes it an invalid command.

The command that I am trying to send:

./pb -r cecon -n CeConIF.ContentReq -c “cmd:1, conf_id:0, provider_session_id:0, source_id:2”

The way I send it to shell via serial port:

log_serial_port(s1,1,'./pb -r cecon -n CeConIF.ContentReq -c “cmd:1, conf_id:0, provider_session_id:0, source_id:2”')

log_serial_port is a function written to send string to serial port s1.

When I send the command via log_serial_port function, I receive the following :

./pb -r cecon -n CeConIF.ContentReq -c cmnIF.ContentReq -c cmd:1, conf_id:0, provider_session_id:0, source_id:2
ProtoBuf Error: Error parsing text-format CeConIF.ContentReq: 1:1: Expected identifier.
Failed to parse input.
255|root@android:/opt/beta/bin #

Here after ./pb -r cecon -n CeConIF.ContentReq, the command got automatically formatted. Hence, Linux was unable to recognize it and hence I got an error 'Failed to parse input'.

I am not sure whats happening here and why MATLAB autoformats the command before sending it to Shell.

Any help is appreciated.

Thank you,

Bhushan

Answer 1

[Walter Roberson]

You need

log_serial_port(s1,1,'./pb -r cecon -n CeConIF.ContentReq -c "cmd:1, conf_id:0, provider_session_id:0, source_id:2"')

The difference is that you used "smart quotes" and I used "straight quotes". Your receiver is getting

./pb -r cecon -n CeConIF.ContentReq -c ?cmnIF.ContentReq -c ?cmd:1, conf_id:0, provider_session_id:0, source_id:2?

which is

./pb -r cecon -n CeConIF.ContentReq -c “cmnIF.ContentReq -c “cmd:1, conf_id:0, provider_session_id:0, source_id:2”

to use HTML representation. That is, the two ? are char(hex2dec('93')) and the ? is char(hex2dec('94')), but your receiver is expecting " which is " which is char(hex2dec('22'))

Answer 2

[Bhushan]

Didn't notice that. Thanks for solving it for me. The straight quote works.