Guile MQTT provides bindings for the libmosquitto MQTT client library. The bindings are written in GOOPS (https://www.gnu.org/software/guile/manual/html_node/GOOPS.html) and rely on lower-level bindings created by NYACC directly and automatically from mosquitto.h.
The bindings align with GOOPS style, which means short method names. (The specialization is done through the arguments.) The user can extend the client class by inheritance. Example: This example, as well as the Guile libmosquitto bindings themselves, are inspired by the Chicken Scheme mosquitto bindings (http://wiki.call-cc.org/eggref/5/mosquitto) by Dmitrii Kosenkov. (use-modules (mosquitto client)) (let ((client (make-client #:on-connect (lambda (client err) (if (not (eq? err MOSQ_ERR_SUCCESS)) (abort err) (display "Yay, we are connected!")))))) (set! (disconnect-callback client) (lambda (client err) (if (not (eq? err MOSQ_ERR_SUCCESS)) (display "Unexpected disconnect...")))) (set! (message-callback client) (lambda (cl msg) (display (string->append "Topic: " (topic msg) "Payload:" payload msg)) (publish client "topic2" "message received, thanks!"))) (connect client "localhost" #:username "mqtt-admin" #:password "mypass") (subscribe client "topic1") (loop-forever client)) See further examples under the directory examples ( https://github.com/mdjurfeldt/guile-mqqt/tree/main/examples). Guile MQTT maturity is beta level. Guile MQTT is free software; the full source distribution is available through * a tarball: https://github.com/mdjurfeldt/guile-mqqt/releases/download/v0.1.0/guile-mqtt-0.1.0.tar.gz * the git repository: https://github.com/mdjurfeldt/guile-mqqt
