MQTT with and without security publisher client example connection issue to broker

RE: MQTT with and without security publisher client example connection issue to broker

bjorn-spockeli — Tue, 26 Jun 2018 08:29:46 GMT

You should be able to run Mosquitto without enabling security, i.e. adding a TLS key. Could you try to run mosquitto_sub -t "led/state" ?
The MQTT broker address will be the IP address of the computer running the broker, i.e. Linux ubuntu 14.04 PC. You should be able to find the ip with the ifconfig command in terminal.

Best regards

Bjørn

RE: MQTT with and without security publisher client example connection issue to broker

Sridhar Jonnavittula — Sat, 09 Jun 2018 14:08:26 GMT

I have added global prefix. Again the same issue is coming.

And one thing I missed is running mosquitto -p 8883 -c ./mosquitto.conf command says

Error: Unknown configuration variable "psk_hint".

Error: Unable to open configuration file.

Error: Unknown configuration variable "psk_file".

Error: Unable to open configuration file.

I have added mosquitto.conf by enabling psk_hint, psk_file

(psk_hint hello

psk_file /home/sridhar/Desktop/ivativ/mosquitto_user/tls_key.txt)

tls_key.txt with same id:key (436c69656e745f6964656e74697479:73656372657450534b) pair as in MQTT publisher example.

1. May be because of the above errors, MQTT connection is not happening when pressing button 1.

2. Also how to know MQTT broker address at the compile time for MQTT publish example?

Please clarify.

Thanks

RE: MQTT with and without security publisher client example connection issue to broker

bjorn-spockeli — Mon, 04 Jun 2018 07:23:05 GMT

Step 8 is is referring to Distributing a global IPv6 prefix

# Set IPv6 forwarding (must be present).

sudo echo 1 > /proc/sys/net/ipv6/conf/all/forwarding

# Run radvd daemon.

sudo service radvd restart

If you're not seeing the IPv6 prefix after running the commands above, then you can try to run

sudo ifconfig bt0 add 2001:db8::1/64

RE: MQTT with and without security publisher client example connection issue to broker

Sridhar Jonnavittula — Fri, 01 Jun 2018 15:11:34 GMT

Yes I have followed. I don't know why until step 7 it is working, step 8 is actually I don't know how to do and after that pressing button 1 MQTT level connection is not happening.

RE: MQTT with and without security publisher client example connection issue to broker

bjorn-spockeli — Fri, 01 Jun 2018 13:54:04 GMT

Sridhar Jonnavittula: Have you followed all the steps listed in the MQTT Client - Publisher example documentation?