Add auth and cert options for connection to MQTT broker

[flopon]

No description provided.

[magcode]

I tried this but ca file is not supported by the mosquitto binary. Can you remove it please?

MF.v2.1.11# export LD_LIBRARY_PATH=/var/etc/persistent/mqtt
MF.v2.1.11# ./mosquitto_pub --help
mosquitto_pub is a simple mqtt client that will publish a message on a single topic and exit.
mosquitto_pub version 1.4.14 running on libmosquitto 1.4.14.

Usage: mosquitto_pub [-h host] [-k keepalive] [-p port] [-q qos] [-r] {-f file | -l | -n | -m message} -t topic
                     [-A bind_address]
                     [-i id] [-I id_prefix]
                     [-d] [--quiet]
                     [-M max_inflight]
                     [-u username [-P password]]
                     [--will-topic [--will-payload payload] [--will-qos qos] [--will-retain]]
                     [--proxy socks-url]
       mosquitto_pub --help

 -A : bind the outgoing socket to this host/ip address. Use to control which interface
      the client communicates over.
 -d : enable debug messages.
 -f : send the contents of a file as the message.
 -h : mqtt host to connect to. Defaults to localhost.
 -i : id to use for this client. Defaults to mosquitto_pub_ appended with the process id.
 -I : define the client id as id_prefix appended with the process id. Useful for when the
      broker is using the clientid_prefixes option.
 -k : keep alive in seconds for this client. Defaults to 60.
 -l : read messages from stdin, sending a separate message for each line.
 -m : message payload to send.
 -M : the maximum inflight messages for QoS 1/2..
 -n : send a null (zero length) message.
 -p : network port to connect to. Defaults to 1883.
 -P : provide a password (requires MQTT 3.1 broker)
 -q : quality of service level to use for all messages. Defaults to 0.
 -r : message should be retained.
 -s : read message from stdin, sending the entire input as a message.
 -t : mqtt topic to publish to.
 -u : provide a username (requires MQTT 3.1 broker)
 -V : specify the version of the MQTT protocol to use when connecting.
      Can be mqttv31 or mqttv311. Defaults to mqttv31.
 --help : display this message.
 --quiet : don't print error messages.
 --will-payload : payload for the client Will, which is sent by the broker in case of
                  unexpected disconnection. If not given and will-topic is set, a zero
                  length message will be sent.
 --will-qos : QoS level for the client Will.
 --will-retain : if given, make the client Will retained.
 --will-topic : the topic on which to publish the client Will.
 --proxy : SOCKS5 proxy URL of the form:
           socks5h://[username[:password]@]hostname[:port]
           Only "none" and "username" authentication is supported.

See http://mosquitto.org/ for more information.

[magcode]

Thank you @flopon for your contribution 🙇
Added a comment regarding --cafile.
Did this work on your machine? Do you use a different mosquitto binary?

[flopon]

OK. Quite suprising, I used the official documentation to add this option!
(https://mosquitto.org/man/mosquitto_pub-1.html)

Anyway, sorry, I had only tested the user/passwd part, I just send you a new version with only the auth modification.

[magcode]

OK. Quite suprising, I used the official documentation to add this option!

no worries. I compiled the mosquitto binaries for busybox myself. Probably the available version was a bit old.