Control a Benq video beamer with serial port

General
1

Hi!

Trying hard to control my video beamer over rs232 serial port
But without any succes, even no error messages :frowning:

For example what i try to do is this: *pow=off#
So i put this in an inject node that is connected to the serial port with the right baud settings.
Any times on how to do this?

Thanks!!!!

more info

2

Looking at the documentation:

<CR>*pow=off#<CR>

it needs a carriage return before and after, did you try:

\r*pow=off#\r
3

thanks, i will try it directly!

4

Nope no result.
What i do is this.

[{"id":"a4b09b4c.8f0318","type":"serial request","z":"9f605b7b.790358","name":"","serial":"cc764c90.f1d708","x":510,"y":160,"wires":[["b804cd5c.b5ac5"]]},{"id":"b804cd5c.b5ac5","type":"debug","z":"9f605b7b.790358","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":670,"y":160,"wires":[]},{"id":"4ecf9592.0a0b44","type":"inject","z":"9f605b7b.790358","name":"","topic":"","payload":"\\r*pow=off#\\r","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":250,"y":160,"wires":[["a4b09b4c.8f0318"]]},{"id":"cc764c90.f1d708","type":"serial-port","z":"","serialport":"/dev/ttyUSB0","serialbaud":"115200","databits":"8","parity":"none","stopbits":"1","waitfor":"","newline":"\\n","bin":"false","out":"char","addchar":"","responsetimeout":"10000"}]
5

Did you checked the baudrate in the beamer menu?
Did you used the cross cable as described on page 4?

The beamer should at least echo something, even if it's a unknown command etc.

On what hardware do you have NR running?

6

You probably need to just add \r to the serial port control config

image
image.png694×166 4.12 KB

(plus make sure you have latest serial port node as there was a bug in it until yesterday.)

Adding \r in an inject node will just add the character \ followed by r
An alternative is to add a function node containing

msg.payload = msg.payload + "\r";
return msg;