You are using an unsupported browser!

Please upgrade your version of IE to at least 9, or use a modern browser such as Chrome or Firefox.


  • MQTT Gateway for Connection to NCD IoT Sensors
  • Plug-and-Play Setup Requires Only WiFi and MQTT Login Credentials
  • SoftAP Web-Page Configuration of Gateway and MQTT Settings
  • Up to 2-Mile Wireless Range Between IoT Sensors and Gateway
  • Up to 10 Meter Wireless Range Between Gateway and WiFi Router
  • Encrypted Communications Between IoT Sensors and Gateway
  • Encrypted Communications Between Gateway and WiFi Connection
  • Encrypted Communications Between Gateway and MQTT
  • Automatically Discovers IoT Sensors & Report to MQTT with Zero Setup
  • Integrated Web-Page Allows Configuration of Remote IoT Sensors
  • Integrated Web-Page Displays Incoming IoT Sensor Data
  • Supports DHCP or Static IP Managed Wireless Networks
  • Automatically Registers Sensors and Pushes Sensor Data to MQTT
  • Compatible with All NCD Wireless IoT Sensors
  • Allows Multiple Gateways to Co-Exist for Redundant Data
  • Over the Air Firmware Update Support Coming Soon


SKU: PR55-21_MQTT UPC: 689860072534 Categories: , , ,


IoT Sensors need a MQTT Gateway.  MQTT is the foundation for nearly all IoT cloud applications, so building a MQTT Gateway for connection to the NCD ecosystem of IoT sensors was an absolute requirement.

The NCD WiFi Micro Gateway connects NCD Wireless IoT Sensors directly to a MQTT broker with an average setup time of about 5 minutes.  The NCD WiFi Micro Gateway listens for sensor data from NCD Wireless IoT Sensors up to 2 miles away and converts the incoming data into JSON strings with real-world human-readable values.  Use the MQTT Gateway to quickly and easily measure temperature and post directly to your own MQTT broker.  Send humidity data, current measurements for power consumption, light level data, counter data, and much more.  The NCD Micro Gateway is compatible with the entire NCD Enterprise product line of wireless IoT sensors.

Our MQTT Gateway user interface supports up to 10 IoT sensors while in configuration mode, displaying the signal strength and sensor data for each sensor during setup.  In Run mode (daily use), the NCD Micro Gateway will work with as many IoT sensors as memory will allow (estimated to be greater than 20, but we did not set a hard limit).  The NCD Micro Gateway may also be used for configuration of basic settings of remote wireless IoT sensors.

Ubidots Compatibility

This device has been tested with the Ubidots IoT Cloud Platform for compatibility.  Ubidots is an official partner of NCD, and we are working together to connect our entire line of IoT connected hardware to the Ubidots platform.  Learn more about Ubidots by clicking here.

What Frequency Do I Need?

During purchase, you will see three frequency options.  Not all options are legal for use in all areas, so it’s important to make the right selection during purchase.  We will build your product and accessories based on the options chosen.  Here, we will explain these options in much greater detail, but please check your local laws BEFORE purchase.

900MHz for North America (U.S., Canada, and Mexico)

If you are located in North America, the 900MHz Option will provide the longest range currently supported with the best penetration through walls, buildings, industrial equipment, and trees.  This option is also the best choice for long range applications.  The official Line of Sight rating for this option is 2 Miles with included antennas or 28 Miles with high-gain antennas.  We suggest contacting for a high-gain antenna recommendation if required.  Please check your local laws before choosing this option.

868MHz for Europe Only

If you are located in Europe, the 868MHz Option is the only legal choice available at this time. This option offers better penetration through walls, builds, trees, and industrial equipment that 2.4GHz. The official line of site rating for this option is 14.5km using 2.1dBi antennas. Please check your local laws before choosing this option.

2.4Ghz for Worldwide Use (Except Europe)

The 2.4GHz option should be chosen if 900MHz and 868MHz are not legal for use in your country. Please note this particular module is NOT LEGAL for use in Europe, as it has a higher transmission power than is legally allowed at 2.4GHz. This option is certified for use in the United States, Japan, Australia, Brazil, and South Korea. Please check your local laws before choosing this option.

Not Sure?

If you are unsure of which sensor option to choose, please contact us.  We may be able to help determine which sensors are legal for use in your area.


MQTT Gateway Configuration Pages

The MQTT Gateway includes a embedded web page configuration screen that makes setup easy, simply register the gateway with your WiFi router by selecting the network name and entering your password, then setup your MQTT login and password:

MQTT Gateway Configuration Screen for use with NCD IoT Long Range Wireless Sensors

MQTT Gateway Configuration Screen for use with NCD IoT Long Range Wireless Sensors


Watch Data Stream In from NCD Wireless Sensors and Review Sensor Readings so you Know your Network is Active!


Change Advanced Settings for use with Managed Networks


IoT Security and Transparency Statement

All IoT Device Manufacturers should commit to IoT Security and Transparency. As a consumer, you have the right to a IoT Security and Transparency Statement BEFORE purchase, and we encourage all customers to demand this information from all IoT Manufacturers and Vendors.  In an effort to be fully transparent with our customers, we will always disclose the most important security related information at the bottom of each product page for all IoT Devices.  Under no circumstances does NCD use IoT devices to collect customer data, sensor readings, or other information without full disclosure.  As a matter of NCD IoT Security Policy, any IoT device that collects any form of data must be disclosed in the IoT Security and Transparency Statement.  In the statements below, we will use the term “Wireless” to indicate localized communications between the Sensors and the Gateway.  We will use the term “WiFi” to indicate communications between the Gateway and the Internet.  Relevant Security Information pertaining to this particular device is Indicated Below:

  • This Device Connects to the Internet for the Purposes of Forwarding Wireless AES Encrypted Sensor Data to a 3rd Party Cloud Platform using WiFi Communications
  • This Gateway Follows the Security Standards as Defined by the 3rd Party Cloud Platform
  • This Gateway Cannot Function Without Following the Security Standards Set Forth by the 3rd Party Cloud Platform
  • This Device Utilizes a Write-Only Application Layer, It is Not Possible to Remotely (Over the Internet) Upload Files or Launch Applications on this Device
  • This Device Uses 128-Bit AES Encrypted Wireless Communications (Minimum) for Connection to NCD Wireless Sensors
  • This Device is Equipped with a Default Wireless AES Encryption Key Common to All NCD Wireless Sensors at the Time of Shipping
  • Users Have the Ability to Change the Default Wireless AES Encryption Key
  • This Device Requires Physical Access to Change the Wireless AES Encryption Key
  • Factory Resetting This Device will Not Alter the Wireless AES Encryption Key
  • The Wireless AES Encryption Key is Stored in Protected Memory and Cannot be Accessed by our Firmware or Externally in Any Known Possible Way
  • Disabling the Wireless AES Encryption Key is Not Supported by this Gateway or Sensors
  • This Device Communicates to NCD Servers Upon Bootup for the Purposes of Checking for Firmware Updates ONLY
  • This Device Communicates to NCD Servers Once per Day for the Purposes of Checking for Firmware Updates ONLY
  • This Device Will Not Automatically Download or Install Firmware Updates
  • This Device Does Not Send Access Keys, Tokens, Passwords, Encryption Keys or Any Form of Customer Data or any form of Sensor Data to NCD Servers
  • Firmware Upgrades Require Physical Access to this Device that May be Initiated by Users, Installers, or NCD Engineers with Physical Access to the Device
  • Firmware Upgrades Cannot be Initiated Remotely (Over the Internet)
  • This Device is Configured Using a Secure WiFi Connection Connected Directly to your Computer or Smart Phone
  • This Device Does Not Require an App for Configuration
  • This Device Temporarily Stores Limited Sensor Data While in Configuration Mode for the Purposes of Demonstration and Configuration or Remote Sensors
  • This Device Does Not Permanently Store Any Sensor Data While in Runtime (Daily Operation) Mode
  • WiFi Communications is Limited to 2.4GHz
  • WiFi Communications is Secured using WPA-PSK2 Security Standards during Device Configuration ONLY
  • WiFi Communications is Secured by the Security Standards Defined by the Customer Router for Daily Use
  • NCD Does Not Recommend the Use of This Device on a Open, Unsecured Networks
  • WiFi Communications Supports the Following Security Standards for Daily Operation: OPEN, WEP, WPA_PSK, WPA2_PSK, WPA_WPA2_PSK, WPA2_ENTERPRISE
  • This Device Will Store Access Keys, Tokens, and Passwords for the Purposes of Performing the Operations for which it is Intended
  • This Device Supports a Hardware Reset Feature which Clears All Access Keys, Tokens, and Passwords from Memory and Erases Everything Except the Wireless AES Encryption Key
  • NCD Does Have the Ability to Retrieve Access Keys, Tokens, and Passwords from this Device, but only if this Device is Physically Returned to our Office
  • It is Possible for 3rd Parties to Retrieve Access Keys, Tokens, and Passwords from this Device with Extensive Programming Skills and Physical Access to this Device
  • NCD is not Aware of Any Method or Process of Remotely Retrieving Access Keys, Tokens, or Passwords Without Physical Access to this Device
  • Should this Device be Returned, NCD Will Not Send Any Data Extracted from this Device, Including Access Keys, Tokens, or Passwords to Any Party Under Any Circumstances


Documentation Downloads


Wiring Diagrams

Click to Enlarge

Buy Now

Product Identification
UPC: 689860072534
Country of Origin: US
HTS Code: 854231
1+ Pieces
10+ Pieces
25+ Pieces
100+ Pieces

Wireless Communication OptionsChange

Please choose a wireless communications module that is legal for use in your region.  Please note: transmission range will be affected by the product options selected below.  If you are in North America, we strongly suggest the 900MHz option for best results.  If you are in Europe, the 868MHz version is the only legal option.  The 2.4GHz option is certified for use in the United States, Australia, Brazil, Japan, and South Korea.  Please note the 2.4GHz version will not penetrate objects as well as the 900MHz and 868MHz versions.  If you need help choosing a wireless option, please contact us.  This option will determine how we build this product and any applicable accessories that may be displayed below.


We Customize Just for You!!

NCD offers many custom IoT electronic design services to help tailor our product to your exact needs.  Whether you are looking for custom firmware, circuit board modifications, metal enclosures, or industrial color printing, we can help you with a wide variety of design services.

Custom IoT Electronic Design Services Process

Most of our users purchase off-the-shelf hardware for initial testing.  Once everything is working, they contact us to build a custom solution which may include specialized changes to the board, firmware, connectors, etc.  Custom boards have many advantages such as reduced wiring, easy installation, small size, less power consumption, and in some cases, an overall reduction in product cost.  Custom IoT Electronic Design Services will have your company name and logo on the board as well as the enclosure.

Customized IoT Electronics

NCD engineers can help build a customized solution for your particular application based on the designs you see on our website.  We can combine devices onto a single board, change the shape, or even some of the components to meet your exact needs.  We also provide turn-key metal enclosures with powder coating and full-color printing on the top side starting at just $500 for setup!  We have more than 20 years of experience in electronics design and manufacturing.  All of our products are designed and manufactured in the USA, so we are here to support the products we make.  We only ask that our customers prototype their needs using our existing products before we customize.

Customization Guidelines

  • Custom designs should be based on our existing product because we can’t build rockets or electric cars over here!
  • We do not provide customization services if it involves the introduction of a new or untested technology.
  • Custom engineering fees depend on your requirements, so please contact us for a quote!
  • We maintain ownership of all designs, including our customized designs as they are based on our existing Design.
  • We will only ship the customized product to you or your authorized agents.
  • We have an NDA available if needed.
  • The turn-around time is about 2-3 weeks.
  • We specialize in low-volume designs, no quantity is too small!
  • We have the ability to scale to large volumes as needed.

Getting Started with Product Customization

All you have to do is contact us and we will walk you through the process from beginning to end, based on your individual needs.  Some people are surprised at how fast we finish CAD design (usually a few hours), but keep in mind, we still have to build your design, which takes considerably more time.  When we customize product, here are the general services we provide:

  • We design the circuit board.
  • We communicate with our customers throughout the customization and manufacturing process.
  • We manufacture surface mount stencils and circuit boards.
  • We program our pick and place machines to build your boards.
  • We build a working sample and run it through our wave solder machine.
  • We test your custom IoT solution.
  • Once the design is finalized it won’t be possible to make changes during production (changes cost money and require us to repeat the above processes)
  • Once it meets all your requirements, we will start production as needed.
  • We work with our metal fabricators to design a metal enclosure if required.
  • You work with our artist to print the top side of the enclosure in full color with your company logo if required.

©2019 National Control Devices, LLC

Made in the USA
5 Year Warranty
Free Shipping on orders over $100
Free Shipping on orders over $100

To learn something new, take the path that you took yesterday. ~John Burroughs

Log in with your credentials


Forgot your details?

Create Account