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Re: [paho-dev] RaspberryPi and mqtt


that's because the first parameter of pahopub is the topic to publish on, and it's mandatory as it stands, so it's taking "--host" as the topic name.  I'll look into fixing that parsing.  If you use:

./a.out /test/abcd <publish_topic> --host --port 1883

it should work, it does for me.


On 04/22/2016 07:40 AM, Vasudha Madugula (vamadugu) wrote:



I am trying to connect to an online broker using the mqtt c client library from my raspberry pi. I compile (gcc pahopub.c -lpaho-mqtt3c) and then run it (./a.out /test/abcd --host --port 1883). It refuses to connect, with a return code of 1 (0x01 Connection Refused, unacceptable protocol version). I have tried the same with other online brokers as well.

What is to be done when “the server does not support the level of the mqtt protocol requested by the client”?




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Ian Craggs                          
icraggs@xxxxxxxxxx                 IBM United Kingdom
Paho Project Lead; Committer on Mosquitto

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