{"id":73534,"date":"2025-06-26T13:09:56","date_gmt":"2025-06-26T11:09:56","guid":{"rendered":"https:\/\/www.deos-ag.com\/blog\/introduction-to-mqtt-the-messaging-protocol-for-the-internet-of-things\/"},"modified":"2025-07-02T11:24:39","modified_gmt":"2025-07-02T09:24:39","slug":"introduction-to-mqtt-the-messaging-protocol-for-the-internet-of-things","status":"publish","type":"post","link":"https:\/\/deos-ag.com\/en\/blog\/introduction-to-mqtt-the-messaging-protocol-for-the-internet-of-things\/","title":{"rendered":"Introduction to MQTT: the messaging protocol for the Internet of Things"},"content":{"rendered":"

[et_pb_section fb_built=”1″ _builder_version=”4.19.4″ _module_preset=”default” background_color=”#FCFCFC” custom_padding=”0px||100px||false|false” locked=”off” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_row _builder_version=”4.27.2″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.19.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_text _builder_version=”4.27.4″ _module_preset=”c34d3f2b-a968-4fb7-8350-bb379fedd7b3″ custom_padding=”||0px||false|false” locked=”off” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

The <\/span>Internet of Things (IoT) <\/b>is growing exponentially and with it the need for <\/span>efficient, reliable and resource-saving communication protocols<\/b>. One such protocol that has proven extremely useful in recent years is <\/span>MQTT (Message Queuing Telemetry Transport)<\/b>). In this blog post, we would like to give you a comprehensive overview of MQTT, explain how it works and highlight the benefits for IoT applications. <\/span><\/p>\n

Read the most important information about MQTT<\/strong> now!<\/span><\/p>\n

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Contents<\/h2>\n
    \n
  1. What is MQTT?<\/a><\/li>\n
  2. How does MQTT work?<\/a><\/li>\n
  3. Advantages of MQTT<\/a><\/li>\n
  4. Application examples<\/a><\/li>\n
  5. Which devices can use MQTT?<\/a><\/li>\n
  6. Is MQTT free of charge?<\/a><\/li>\n
  7. How secure is MQTT?<\/a><\/li>\n<\/ol>\n

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    What is MQTT?<\/strong><\/h2>\n

    MQTT is a message-based protocol developed by <\/span>Andy Stanford-Clark from IBM<\/b> and <\/span>Arlen Nipper from Cirrus Link Solutions <\/b> was developed in 1999. It was specially developed for the <\/span>requirements of the IoT <\/b>and is ideal for communication between devices with limited resources or in networks with low bandwidth. <\/span> <\/p>\n

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    How does MQTT work?<\/b><\/h2>\n

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    The MQTT protocol is based on a <\/span>publisher-subscriber model<\/b>which consists of three main components:<\/span><\/p>\n

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    The device or application that publishes the data. For example, a temperature sensor could send the current temperature data to an MQTT broker.<\/p>\n

    [\/et_pb_dp_dmb_module_449_item][et_pb_dp_dmb_module_449_item titel=”Subscriber” icon=”https:\/\/deos-ag.com\/wp-content\/uploads\/2023\/02\/deos-ag-icons-bedienen-71.svg” divi_icon=”||fa||900″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

    The device or application that subscribes to the data. For example, a heating system could subscribe to the sensor’s temperature data in order to react accordingly.<\/p>\n

    [\/et_pb_dp_dmb_module_449_item][et_pb_dp_dmb_module_449_item titel=”Broker” icon=”https:\/\/deos-ag.com\/wp-content\/uploads\/2023\/02\/deos-ag-icons-usb-connection-66.svg” divi_icon=”||fa||900″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

    The intermediary who receives the messages from the publishers and forwards them to the corresponding subscribers. The broker ensures that the messages are delivered efficiently and reliably.<\/p>\n

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    In contrast to traditional client-server models, this <\/span>publish-subscribe model<\/b> decoupled communication, which increases scalability and flexibility. The connection between the devices is <\/span>via so-called MQTT Topics<\/b>which represent specific communication channels. MQTT also uses <\/span>TCP as the transport protocol<\/b>to ensure reliable transmission of messages.<\/span><\/p>\n

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    Advantages of MQTT<\/h2>\n

    The MQTT communication protocol has many advantages. Here is an overview of the most important ones: <\/p>\n

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    MQTT requires only minimal resources and is therefore ideal for devices with limited computing power and memory.<\/span><\/p>\n

    [\/et_pb_dp_dmb_module_449_item][et_pb_dp_dmb_module_449_item titel=”Efficient” icon=”https:\/\/deos-ag.com\/wp-content\/uploads\/2023\/02\/deos-ag-icons-schnell-39.svg” _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

    Thanks to its low overhead, MQTT is particularly suitable for networks with low bandwidth.<\/span><\/p>\n

    [\/et_pb_dp_dmb_module_449_item][et_pb_dp_dmb_module_449_item titel=”Reliable” icon=”https:\/\/deos-ag.com\/wp-content\/uploads\/2023\/02\/deos-ag-icons-zertifikat-36.svg” _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

    The QoS levels enable flexible adaptation of the reliability of message transmission.<\/span><\/p>\n

    [\/et_pb_dp_dmb_module_449_item][\/et_pb_dp_dmb_module_449][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ module_id=”application-examples” _builder_version=”4.27.4″ _module_preset=”default” background_color=”#F2F2F2″ custom_margin=”||||false|false” custom_padding=”100px||100px||false|false” locked=”off” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_row _builder_version=”4.19.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.19.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_text module_id=”anwendungsbeispiele” _builder_version=”4.27.4″ _module_preset=”default” module_alignment=”center” custom_margin=”||0px||false|false” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

    Application examples<\/b><\/h2>\n

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    These advantages make MQTT particularly useful in various application areas. In buildings <\/span> sensors and actuators can<\/b> communicate with each other via MQTT, for example to <\/span>Lighting, heating and security systems<\/b> control. In industrial automation, especially in Industry 4.0, MQTT enables the <\/span>Real-time monitoring and control of machines and production processes<\/b>. In agriculture and environmental monitoring, sensors can use MQTT to collect data such as <\/span>soil moisture, temperature and air quality <\/b>to central systems.<\/span><\/p>\n

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    <\/strong><\/h3>\n

    Where is MQTT used with DEOS?<\/strong><\/h3>\n

    At DEOS, for example, the MQTT protocol is used between the OPENweb<\/em> (building management software)<\/a>, the LoRa gateway<\/a>, the OPEN GATE multi-gateway<\/a> and the IoT platform<\/a>.<\/p>\n

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    BMS software OPENweb<\/em><\/h3>\n

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    LoRaWAN gateway<\/h3>\n

    [\/et_pb_text][et_pb_button button_url=”@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF9saW5rX3VybF9wcm9kdWt0ZSIsInNldHRpbmdzIjp7InBvc3RfaWQiOiIzMTMzOSJ9fQ==@” button_text=”Learn more” _builder_version=”4.27.4″ _dynamic_attributes=”button_url” _module_preset=”1bb0de9c-8209-4e8a-8fb4-ca28952846a1″ custom_margin=”20px||||false|false” locked=”off” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_button][\/et_pb_column][et_pb_column type=”1_4″ module_class=”deos-image-text-teaser” _builder_version=”4.27.4″ _module_preset=”default” background_color=”#FFFFFF” custom_padding=”30px|30px|30px|30px|true|true” custom_padding_tablet=”||30px||false|false” custom_padding_phone=”||30px||false|false” custom_padding_last_edited=”on|tablet” border_radii=”on|10px|10px|10px|10px” global_colors_info=”{}” box_shadow_spread__hover_enabled=”on|desktop” box_shadow_blur__hover_enabled=”on|hover” box_shadow_blur__hover=”” box_shadow_spread__hover=”” theme_builder_area=”post_content”][et_pb_image src=”https:\/\/deos-ag.com\/wp-content\/uploads\/deos-ag-open-gate-OPEN_GATE_Protokolle.png” alt=”DEOS OPEN GATE Modbus, M-Bus, BacNET” title_text=”deos ag open gate open gate protocols” _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_image][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

    Multigateway OPEN GATE<\/h3>\n

    [\/et_pb_text][et_pb_button button_url=”@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF9saW5rX3VybF9wcm9kdWt0ZSIsInNldHRpbmdzIjp7InBvc3RfaWQiOiIzMTM0NyJ9fQ==@” button_text=”Learn more” _builder_version=”4.27.4″ _dynamic_attributes=”button_url” _module_preset=”1bb0de9c-8209-4e8a-8fb4-ca28952846a1″ custom_margin=”20px||||false|false” locked=”off” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_button][\/et_pb_column][et_pb_column type=”1_4″ module_class=”deos-image-text-teaser” _builder_version=”4.27.4″ _module_preset=”default” background_color=”#FFFFFF” custom_padding=”30px|30px|30px|30px|true|true” custom_padding_tablet=”||30px||false|false” custom_padding_phone=”||30px||false|false” custom_padding_last_edited=”on|tablet” border_radii=”on|10px|10px|10px|10px” global_colors_info=”{}” box_shadow_spread__hover_enabled=”on|desktop” box_shadow_blur__hover_enabled=”on|hover” box_shadow_blur__hover=”” box_shadow_spread__hover=”” theme_builder_area=”post_content”][et_pb_image src=”https:\/\/deos-ag.com\/wp-content\/uploads\/2023\/02\/deos-ag-iot-plattform-Composing_proBuilding_Suite_3_Bildschirme.png” alt=”DEOS proBuilding 3 screens” title_text=”deos ag management software openweb screen” module_class=”img-cover” _builder_version=”4.27.4″ _module_preset=”064c7f78-34de-4bb7-b728-0df22fb71cbf” background_color=”RGBA(255,255,255,0)” custom_padding=”15px||0px||false|false” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_image][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

    IoT platform pro.Building Suite<\/h3>\n

    [\/et_pb_text][et_pb_button button_url=”@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF9saW5rX3VybF9wcm9kdWt0ZSIsInNldHRpbmdzIjp7InBvc3RfaWQiOiI2NjMifX0=@” button_text=”Learn more” _builder_version=”4.27.4″ _dynamic_attributes=”button_url” _module_preset=”1bb0de9c-8209-4e8a-8fb4-ca28952846a1″ custom_margin=”20px||||false|false” locked=”off” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_button][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” custom_padding=”31px|||||” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

    Thanks to standardized interfaces such as MQTT, the pro.Building Suite enables the smooth import and export of data<\/strong> as well as direct communication with the system technology and existing third-party systems.<\/strong><\/p>\n

    [\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ module_class=”bg-grey-white” _builder_version=”4.27.4″ _module_preset=”23d5e7b4-1be9-409b-8d2f-dc9db9a13329″ custom_padding_phone=”35px||35px||true|false” locked=”off” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_row column_structure=”3_4,1_4″ module_class=”mega-button Kontaktformular row-over-sections” _builder_version=”4.19.4″ _module_preset=”default” background_color=”#DD2038″ background_enable_color=”on” transform_translate_linked=”off” positioning=”none” position_origin_a=”top_center” position_origin_r=”bottom_right” custom_margin=”||||false|false” custom_margin_tablet=”||||false|false” custom_margin_phone=”||||false|false” custom_margin_last_edited=”on|phone” custom_padding=”50px|50px|50px|50px|true|true” custom_padding_tablet=”||||true|false” custom_padding_phone=”||||true|false” custom_css_main_element=”display:flex;||align-items: center;||” border_radii=”on|10px|10px|10px|10px” box_shadow_style=”preset1″ box_shadow_horizontal=”2px” box_shadow_blur=”8px” box_shadow_color=”rgba(64,64,64,0.16)” global_colors_info=”{}” transform_styles__hover_enabled=”on|hover” transform_scale__hover_enabled=”on|hover” transform_translate__hover_enabled=”on|desktop” transform_rotate__hover_enabled=”on|desktop” transform_skew__hover_enabled=”on|desktop” transform_origin__hover_enabled=”on|desktop” background__hover_enabled=”on|hover” background_color__hover=”#b11a2d” background_enable_color__hover=”on” box_shadow_horizontal__hover_enabled=”on|desktop” box_shadow_blur__hover_enabled=”on|hover” box_shadow_blur__hover=”12px” box_shadow_color__hover_enabled=”on|hover” box_shadow_color__hover=”rgba(64,64,64,0.26)” box_shadow_horizontal__hover=”2px” width__hover_enabled=”on” width__hover=”100%” transform_scale__hover=”103%|103%” theme_builder_area=”post_content”][et_pb_column type=”3_4″ _builder_version=”4.19.2″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_dp_dmb_module_30335 formular=”63d208b9a5503″ id_button=”Kontaktformular” _builder_version=”4.27.4″ _module_preset=”default” locked=”off” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_dp_dmb_module_30335][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” text_text_color=”#FFFFFF” custom_padding_tablet=”||15px||false|false” custom_padding_phone=”||15px||false|false” custom_padding_last_edited=”on|tablet” text_orientation_tablet=”” text_orientation_phone=”center” text_orientation_last_edited=”on|phone” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

    Do you have further questions about our products?<\/p>\n

    [\/et_pb_text][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” header_2_text_color=”#FFFFFF” max_width=”500px” header_2_text_align_tablet=”” header_2_text_align_phone=”center” header_2_text_align_last_edited=”on|phone” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

    Then contact us! We’re glad to help.<\/h2>\n

    [\/et_pb_text][et_pb_image src=”https:\/\/deos-ag.com\/wp-content\/uploads\/2022\/12\/mega-button-arrow.svg” title_text=”mega-button-arrow” align=”center” disabled_on=”off|on|on” _builder_version=”4.19.2″ _module_preset=”default” max_width=”55px” custom_padding=”||||false|false” custom_padding_tablet=”||||false|false” custom_padding_phone=”30px||||false|false” custom_padding_last_edited=”on|phone” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_image][\/et_pb_column][et_pb_column type=”1_4″ module_class=”mega-button-arrow-col” disabled_on=”on|off|off” _builder_version=”4.19.2″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_image src=”https:\/\/deos-ag.com\/wp-content\/uploads\/2022\/12\/chevron-right-solid.svg” title_text=”chevron-right-solid” align=”right” disabled_on=”on|off|off” module_class=”mega-button-arrow” _builder_version=”4.19.2″ _module_preset=”default” height=”28px” max_height=”28px” global_colors_info=”{}” custom_css_after__hover_enabled=”on|desktop” theme_builder_area=”post_content”][\/et_pb_image][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ module_id=”which-devices-can-mqtt” _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_row _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_text module_id=”welcheger\u00e4tek\u00f6nnenmqtt” _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

    Which devices can use MQTT?<\/b><\/h2>\n

    MQTT is supported by a large number of devices and systems:<\/span><\/p>\n

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