Post to MQTT

Co-authored-by: Copilot <copilot@github.com>

Dockerfile

@@ -16,6 +16,5 @@ RUN \
   apt-get install -y $BUILD_PACKAGES && \
   bundle install
 
-COPY . .
 
 CMD ["/bin/bash -c ruby ./smartmeter.rb"]

Gemfile

@@ -12,3 +12,4 @@ gem 'numo-narray'
 gem 'i18n'
 gem 'gruff'
 gem 'net-http' # to avoid error: uninitialized constant ...
+gem 'mqtt'

Gemfile.lock

@@ -1,13 +1,13 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activemodel (7.1.5.1)
-      activesupport (= 7.1.5.1)
-    activerecord (7.1.5.1)
-      activemodel (= 7.1.5.1)
-      activesupport (= 7.1.5.1)
+    activemodel (7.1.6)
+      activesupport (= 7.1.6)
+    activerecord (7.1.6)
+      activemodel (= 7.1.6)
+      activesupport (= 7.1.6)
       timeout (>= 0.4.0)
-    activesupport (7.1.5.1)
+    activesupport (7.1.6)
       base64
       benchmark (>= 0.3)
       bigdecimal
@@ -20,53 +20,55 @@ GEM
       mutex_m
       securerandom (>= 0.3)
       tzinfo (~> 2.0)
-    base64 (0.2.0)
-    benchmark (0.4.0)
-    bigdecimal (3.1.9)
-    concurrent-ruby (1.3.4)
-    connection_pool (2.4.1)
+    base64 (0.3.0)
+    benchmark (0.5.0)
+    bigdecimal (4.1.2)
+    concurrent-ruby (1.3.6)
+    connection_pool (2.5.5)
     daemons (1.4.1)
-    date (3.4.1)
-    drb (2.2.1)
-    et-orbi (1.2.11)
+    date (3.5.1)
+    drb (2.2.3)
+    et-orbi (1.4.0)
       tzinfo
-    fugit (1.11.1)
-      et-orbi (~> 1, >= 1.2.11)
+    fugit (1.12.1)
+      et-orbi (~> 1.4)
       raabro (~> 1.4)
     gruff (0.24.0)
       histogram
       rmagick (>= 5.3)
     histogram (0.2.4.1)
-    i18n (1.14.6)
+    i18n (1.14.8)
       concurrent-ruby (~> 1.0)
-    logger (1.6.4)
-    mail (2.8.1)
+    logger (1.7.0)
+    mail (2.9.0)
+      logger
       mini_mime (>= 0.1.1)
       net-imap
       net-pop
       net-smtp
     mini_mime (1.1.5)
-    mini_portile2 (2.8.8)
-    minitest (5.25.4)
+    minitest (5.26.1)
+    mqtt (0.7.0)
+      logger
     mutex_m (0.3.0)
-    mysql2 (0.5.6)
-    net-http (0.6.0)
-      uri
-    net-imap (0.4.18)
+    mysql2 (0.5.7)
+      bigdecimal
+    net-http (0.9.1)
+      uri (>= 0.11.1)
+    net-imap (0.4.24)
       date
       net-protocol
     net-pop (0.1.2)
       net-protocol
     net-protocol (0.2.2)
       timeout
-    net-smtp (0.5.0)
+    net-smtp (0.5.1)
       net-protocol
-    nokogiri (1.15.7)
-      mini_portile2 (~> 2.8.2)
+    nokogiri (1.15.7-aarch64-linux)
       racc (~> 1.4)
     numo-narray (0.9.2.1)
     observer (0.1.2)
-    pkg-config (1.5.8)
+    pkg-config (1.6.5)
     raabro (1.4.0)
     racc (1.8.1)
     rmagick (5.5.0)
@@ -75,12 +77,12 @@ GEM
     rufus-scheduler (3.9.2)
       fugit (~> 1.1, >= 1.11.1)
     securerandom (0.3.2)
-    serialport (1.3.2)
+    serialport (1.4.0)
     state_pattern (2.0.2)
-    timeout (0.4.3)
+    timeout (0.6.1)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
-    uri (1.0.2)
+    uri (1.1.1)
 
 PLATFORMS
   ruby
@@ -91,6 +93,7 @@ DEPENDENCIES
   gruff
   i18n
   mail
+  mqtt
   mysql2
   net-http
   nokogiri

app/helpers/InSyncState.rb

@@ -94,15 +94,11 @@ class InSyncState < StatePattern::State
           reading.save
         end
 
-	# Write to EmonHub
-        begin
-		TCPSocket.open("printserver",5050){|s|
-	  s.write(sprintf("8 %d %d\r\n", reading.current_kw_consumed*1000, reading.current_kw_produced*1000))
-	 }
-	rescue
-	 p "Socket problem."
-	end
-	# Result
+	      # Post current_kw_consumed and current_kw_produced to MQTT
+        MqttClient.publish("home/energy/current_kw_consumed", reading.current_kw_consumed.to_s)
+        MqttClient.publish("home/energy/current_kw_produced", reading.current_kw_produced.to_s) 
+
+	      # Result
         return reading
 
      end

app/helpers/MqttClient.rb

@@ -0,0 +1,77 @@
+begin
+  require "mqtt"
+rescue LoadError
+  # Fallback to mosquitto_pub when the mqtt gem is not available.
+end
+
+module MqttClient
+  class << self
+    def publish(topic, payload, retain: false, qos: 0)
+      return false if topic.nil? || topic.empty?
+
+      if defined?(MQTT)
+        publish_with_ruby_mqtt(topic, payload, retain, qos)
+      else
+        publish_with_mosquitto_pub(topic, payload, retain, qos)
+      end
+    rescue StandardError => e
+      warn("[MqttClient] publish failed: #{e.class}: #{e.message}")
+      false
+    end
+
+    private
+
+    def publish_with_ruby_mqtt(topic, payload, retain, qos)
+      options = {
+        host: mqtt_host,
+        port: mqtt_port,
+        keep_alive: 30
+      }
+
+      options[:username] = mqtt_username if mqtt_username
+      options[:password] = mqtt_password if mqtt_password
+
+      MQTT::Client.connect(options) do |client|
+        client.publish(topic, payload.to_s, retain, qos)
+      end
+
+      true
+    end
+
+    def publish_with_mosquitto_pub(topic, payload, retain, qos)
+      command = [
+        "mosquitto_pub",
+        "-h", mqtt_host,
+        "-p", mqtt_port.to_s,
+        "-q", qos.to_s,
+        "-t", topic,
+        "-m", payload.to_s
+      ]
+
+      command << "-r" if retain
+
+      ok = system(*command)
+      warn("[MqttClient] mosquitto_pub failed") unless ok
+      ok
+    end
+
+    def mqtt_host
+      ENV.fetch("MQTT_HOST", "localhost")
+    end
+
+    def mqtt_port
+      Integer(ENV.fetch("MQTT_PORT", "1883"))
+    rescue ArgumentError
+      1883
+    end
+
+    def mqtt_username
+      v = ENV["MQTT_USERNAME"]
+      v.nil? || v.strip.empty? ? nil : v
+    end
+
+    def mqtt_password
+      ENV["MQTT_PASSWORD"]
+    end
+  end
+end

docker-compose.yml

@@ -21,15 +21,6 @@ services:
       - .:/usr/src/app
     depends_on:
       - db
-  rstudio:
-    container_name: rstudio
-    restart: unless-stopped
-    build: ./rstudio
-    environment:
-      PASSWORD: secret
-    volumes:
-      - ./rstudio:/home/rstudio/smartmeter
-    ports:
-      - 8787:8787
+