Unable to use Telnet on Raspberry Pi

General
1

Hi everyone,

I've got node red fired up on my raspberry pi and for the life of me I cannot get Telnet to work through NodeRed. Here is what I'm trying to do with telnet:
I have an audio DSP that I want to control through telnet, and have successfully controlled this DSP with telnet through other applications (including telnet through this RPI's terminal). For whatever reason I just cant seem to make it work through NodeRed. I get the error "Response wait exceeded timeout value (request 1500)"

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Flow is here:

[{"id":"7774bffc.0fe27","type":"debug","z":"d6f410eb.bc592","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":1270,"y":100,"wires":[]},{"id":"a754549d.ea27f8","type":"inject","z":"d6f410eb.bc592","name":"","props":[{"p":"payload"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"Level1 increment level 1 1","payloadType":"str","x":850,"y":100,"wires":[["b11c8a52.3b57d8"]]},{"id":"b11c8a52.3b57d8","type":"telnet-request","z":"d6f410eb.bc592","name":"","connection":"2621e7b6.ff31f8","ending":"","endingType":"str","error":"error","x":1060,"y":100,"wires":[["7774bffc.0fe27"],["7774bffc.0fe27"],["7774bffc.0fe27"]]},{"id":"2621e7b6.ff31f8","type":"telnet-connection","name":"Tesira","address":"192.168.1.51","port":"23","inDelimiter":"","outDelimiter":"\\r","timeOut":"1500","clearOut":"","openTries":"1"}]
2

Its waiting for a response by the look of it.

you could consider just using a tcp node and just blindly send it, that way it doesnt expect anything to come back.

3

Hi Lefty,

I've tried the TCP node to no avail, I've also tried multiple SSH blocks to no avail as well....

4

put sniffit on your pi

first do it manually within a telnet session.

and then do it with node-red and see what the differences are.

You realise you have to send carriage return and new line after each command?

5

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