Wireless PLC Communication & IoT Connectivity

13 products

13 products

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Wireless for OPTA
$170.28
Out of Stock
Wireless for OPTA Bundle
$299.00
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Notecard WiFi
$10.00
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Notecard Cellular
from $49.00
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Notecard Cell+WiFi
from $53.00
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Notecarrier A
$25.00
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Notecarrier B
$15.00
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Notecarrier X
$10.00
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Notecarrier XM
$5.00
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Notecarrier XS
$15.00
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Notecarrier Pi Hat
$15.00
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Notecard Cellular (Narrowband)
from $45.00
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Notecard Cell+WiFi (Narrowband)
from $49.00

Wireless PLC Communication & Remote Monitoring

Industrial control systems are increasingly expected to operate beyond the boundaries of local networks. This collection brings together the hardware needed to enable wireless PLC communication, allowing systems to transmit data to the cloud, remote dashboards, and monitoring platforms without relying on wired infrastructure.

By adding cellular or Wi-Fi connectivity to PLC environments, teams can monitor performance, collect telemetry, and respond to events in real time - even across distributed or hard-to-reach locations.

Connect PLCs to the Cloud Without Rebuilding Systems

Blues hardware is designed to integrate with existing PLC environments, making it possible to add IoT connectivity without redesigning control logic or infrastructure.

Using modules like Wireless for OPTA alongside Notecard-based connectivity, engineers can:

  • Send PLC data to cloud platforms
  • Enable remote diagnostics and alerts
  • Monitor industrial systems from anywhere
  • Reduce reliance on local SCADA-only access
  • Extend system visibility beyond the facility

This approach simplifies industrial IoT adoption while maintaining reliability and security.

Built for industrial PLC platforms such as Arduino OPTA, solutions like Wireless for OPTA make it easier to extend existing systems with secure wireless connectivity.

Cellular & Wi-Fi Connectivity for Industrial Systems

Different environments require different connectivity options.

  • Cellular modules provide reliable communication in remote or distributed locations
  • Wi-Fi modules support local network integration within facilities
  • Hybrid approaches allow systems to adapt to changing connectivity conditions

Blues hardware enables consistent communication across these environments using a unified interface and cloud routing system.

Common Industrial IoT Use Cases

  • Remote PLC monitoring and diagnostics
  • Industrial telemetry and data logging
  • Smart manufacturing and equipment monitoring
  • Energy and utility system tracking
  • Infrastructure and facility management
  • Predictive maintenance systems

These applications benefit from reliable, low-maintenance connectivity that extends beyond traditional industrial networks.

Built for Industrial Environments

Blues connectivity hardware is designed to operate in real-world industrial conditions, supporting long-term deployments, low-power operation, and secure communication.

By combining modular hardware with cloud-based data routing, teams can build scalable systems that evolve with their operational needs.

Developer & Integration Resources

Blues provides documentation, quickstart guides, and example integrations for connecting PLC systems to cloud platforms using wireless hardware.

Wireless for OPTA

Wireless for OPTA

$170.28
/
Shipping calculated at checkout.

Add wireless connectivity to your micro PLC projects with Blues Notecard! The Wireless for OPTA adds Cellular and WiFi connectivity, powered by Notecard and Notehub.

The Wireless for OPTA Expansion Module can quickly add Cellular and WiFi capability to any Opta PLC inexpensively with a pluggable module that uses the standard AUX expansion port on an Arduino® Opta® or a Finder OPTA®, and can be daisy-chained with up to 8 other Expansion modules. The Opta communicates with the Expansion and its Notecard via I2C and can leverage the Blues' note-arduino library for configuring Notecard and its backhaul.

Wireless for OPTA Key Specs

  • 12 to 24 V Supply Voltage
  • Cellular and WiFi communication powered by Notecard (LTE Cat 1 North America or LTE Cat 1 EMEA) including 500 MB of data and 10-years of service with no activation fees or monthly commitments.
  • Network backhaul via Blues Notehub cloud service, with support for AWS, Azure, GCP and dozens of other cloud services.
  • Communication test button and Neopixel for connectivity status.
  • USB C port for direct Notecard programming and debugging.
  • External SIM slot for bringing your own Cellular connectivity.
  • Power outage detection and notification via an integrated Lithium-Ion Capacitor.

Available Variants

Additional Resources

"Arduino" and "Opta" are registered trademarks of Arduino SA. 

Finder OPTA® is a registered trademark of Finder S.p.A.

Notecard WiFi

$10.00
/
Shipping calculated at checkout.

Notecard is a device-to-cloud data pump that reduces the complexity of building connected solutions with WiFi. As an embeddable system on module (SoM), Notecard can be used with any microcontroller for both greenfield and retrofit projects using your own design, or one of our custom designed Notecarriers.

Notecard WiFi is a lower-cost version of cellular-based Notecards for 2.4 GHz WiFi only, and is API-compatible with cellular-based Notecards. Notecard WiFi also supports location tracking via WiFi Triangulation.

With just two lines of code you can send data to the cloud in minutes, with no complex device registration or provisioning required. With a powerful JSON-based API, you can program Notecard over USB, or control it from your preferred microcontroller or single-board computer using one of our open-source firmware libraries. Connect from your preferred host to Notecard using Serial or I2C.

Notecard is designed to work with a cloud service for ingesting and processing device data. Notehub provides secure device connectivity, project and fleet management, and simple routing to 3rd party cloud services.

Notecard is meant to be used with a Notecarrier. Notecard WiFi is compatible with all available Notecarriers. See the Notecarriers section for more details or get started with a Blues Starter Kit.

Ordering Note: Notecards purchased from the Blues Shop will ship with a Developer Firmware Release version pre-installed. If you require a Long-Term Support (LTS) version for a Shop order, please contact Sales for assistance.

Available Variations

Key Notecard WiFi Specs

  • Utilizes the ESP32-S3-WROOM-1-N8R2 for connecting to 2.4 GHz WiFi networks.
  • JSON- and SoftAP-based provisioning support.
  • Onboard ultra-low power ESP32 MCU with 8MB flash memory.
  • High-performance 3-axis accelerometer and temperature sensor.

Additional Resources

Notecard Cellular

$58.83
/
Shipping calculated at checkout.

Featuring an improved STM32 MCU, an onboard dual SIM capability, and an improved Low IQ power supply, Notecard Cellular is a drop-in functional replacement for original "Green" Notecard at a lower price.

Notecard is a device-to-cloud data pump that reduces the complexity of building connected solutions with secure, reliable cellular. As an embeddable system on module (SoM), Notecard can be used with any microcontroller for both greenfield and retrofit projects using your own design, or one of our custom designed Notecarriers.

With just two lines of code you can send data to the cloud in minutes, with no complex device registration or provisioning required. With a powerful JSON-based API, you can program Notecard over USB, or control it from your preferred microcontroller or single-board computer using one of our open-source firmware libraries. Connect from your preferred host to Notecard using Serial or I2C.

Notecard is designed to work with a cloud service for ingesting and processing device data. Notehub provides secure device connectivity, project and fleet management, and simple routing to 3rd party cloud services.

Notecard is meant to be used with a Notecarrier. Notecard Cellular is compatible with all available Notecarriers. See the Notecarriers section for more details or get started with a Blues Starter Kit.

Ordering Note: Notecards purchased from the Blues Shop will ship with a Developer Firmware Release version pre-installed. If you require a Long-Term Support (LTS) version for a Shop order, please contact Sales for assistance.

Available Variations

Key Notecard Cellular Specs

  • Includes a secure element with a factory-installed ECC P-384 certificate, provisioned at chip manufacture.

  • Integrated GPS and accelerometer.

  • Designed to operate on battery power, be "always-on" to maintain time and location, while typically drawing less than 8µA@5V, when idle.

  • Bundled with 10 years of service and 500MB of cellular data.

  • No cellular subscriptions, SIM fees, or monthly minimums apply.

  • PTCRB Certified Module.

Additional Resources

Notecard Cell+WiFi

$77.83
/
Shipping calculated at checkout.

Notecard is a device-to-cloud data pump that reduces the complexity of building connected solutions with secure, reliable cellular and WiFi. As an embeddable system on module (SoM), Notecard can be used with any microcontroller for both greenfield and retrofit projects using your own design, or one of our custom designed Notecarriers.

Notecard Cell+WiFi allows for dynamic fallback from WiFi to cellular and indoor location tracking via WiFi Triangulation.

Notecard Cell+WiFi (MB) adds an LTE Cat 1 bis Notecard to complement our existing Notecard SKUs. This "Midband" Notecard provides a step-up in performance from 2G/3G, Cat-M, and NB-IoT without a big step-up in price.

With just two lines of code you can send data to the cloud in minutes, with no complex device registration or provisioning required. With a powerful JSON-based API, you can program Notecard over USB, or control it from your preferred microcontroller or single-board computer using one of our open-source firmware libraries. Connect from your preferred host to Notecard using Serial or I2C.

Notecard is designed to work with a cloud service for ingesting and processing device data. Notehub provides secure device connectivity, project and fleet management, and simple routing to 3rd party cloud services.

Notecard is meant to be used with a Notecarrier. Notecard Cell+WiFi is compatible with all available Notecarriers. See the Notecarriers section for more details or get started with a Blues Starter Kit.

Ordering Note: Notecards purchased from the Blues Shop will ship with a Developer Firmware Release version pre-installed. If you require a Long-Term Support (LTS) version for a Shop order, please contact Sales for assistance.

Available Variations

Key Notecard Cell+WiFi Specs

  • Includes a secure element with a factory-installed ECC P-384 certificate, provisioned at chip manufacture.
  • Integrated GPS and accelerometer.
  • Designed to operate on battery power, be "always-on" to maintain time and location, while typically drawing less than 8µA@5V, when idle.
  • Bundled with 10 years of service and 500MB of cellular data.
  • No cellular subscriptions, SIM fees, or monthly minimums apply.
  • PTCRB Certified Module.
  • Includes a 2.4 GHz WiFi module with WiFi to Cellular fallback capabilities.

Additional Resources

Notecarrier A

$25.00
/
Shipping calculated at checkout.

Notecarriers are companion development boards designed to make it easy to prototype and deploy IoT solutions with the Notecard.

Notecarrier A is designed for building battery-powered wireless applications, exposes all of the pins of Notecard via the provided headers, and has onboard cellular and GPS/GNSS antennas.

Notecarriers require a Notecard to function. Notecarrier A is now compatible with all available Notecards. See the Notecards section for more details or get started with a Blues Starter Kit.

Available Variations

  • Notecarrier A with Loose Header Pins (Datasheet)

Key Notecarrier A Specs

  • Onboard cellular and GPS/GNSS antennas by Ignion.
  • Notecard M.2 Key E connector socket and mounting screw receptacle.
  • USB C port to power Notecarrier and provide a USB Serial command interface to Notecard.
  • JST connector for a LiPo battery.
  • JST connector for a solar panel.
  • 2 Qwiic/StemmaQT I2C ports for attaching external peripherals.
  • External Nano-SIM slot for use of an optional secondary SIM.

Additional Resources

Notecarrier B

$15.00
/
Shipping calculated at checkout.

Notecarriers are companion development boards designed to make it easy to prototype and deploy IoT solutions with Notecard.

Notecarrier B is a small form-factor Notecarrier, only slightly larger than Notecard itself. Unlike other Notecarriers, Notecarrier B does not include an external SIM slot.

Included is a flexible Molex 209142 antenna for use with either LTE or GPS. If you require a dual LTE/GPS antenna, we recommend adding on the flexible LTE+GPS antenna (or you may choose to use your own preferred antenna).

Notecarriers require a Notecard to function. Notecarrier B is compatible with all available Notecards. See the Notecards section for more details or get started with a Blues Starter Kit.

Available Variations

  • Notecarrier B with Pre-soldered Headers (Datasheet)
  • Notecarrier B with Loose Header Pins (Datasheet)

Key Notecarrier B Specs

  • Notecard M.2 Key E connector socket and mounting screw receptacle.
  • 2-Pin JST PH connecter for LiPo battery power support.
  • 1 Qwiic/StemmaQT I2C port for attaching external peripherals.
  • Dip switch for using active or passive GPS/GNSS antenna.

Additional Resources

Notecarrier X

$10.00
/
Shipping calculated at checkout.

Notecarriers are companion development boards designed to make it easy to prototype and deploy IoT solutions with the Notecard.

Notecarrier X is a small form-factor Notecarrier, only slightly larger than Notecard itself. Notecarrier X is our most capable small-form factor Notecarrier with JST connectors for LiPo battery and charging support, as well as Qwiic and ESLOV ports for connecting Notecard to host MCUs over I2C.

Included is a flexible Molex 209142 antenna for use with either LTE or GPS. If you require a dual LTE/GPS antenna, we recommend adding on the flexible LTE+GPS antenna (or you may choose to use your own preferred antenna). Our loose header pins are also included.

Notecarriers require a Notecard to function. Notecarrier X is compatible with all available Notecards. See the Notecards section for more details or get started with a Blues Starter Kit.

Key Notecarrier X Specs

  • Notecard M.2 Key E connector socket and mounting screw receptacle.

  • USB C port to power Notecarrier and provide a USB Serial command interface to Notecard.

  • External Nano-SIM slot for use of an optional secondary SIM.

  • 2-Pin JST PH connectors for LiPo battery power and charging support.

  • 1 Qwiic/StemmaQT I2C port for attaching external peripherals.

  • 1 ESLOV port for attaching the Notecard to Arduino MKR or PRO boards.

  • DIP switch for using active or passive GPS/GNSS antenna. 

Additional Resources

Notecarrier XM

$5.00
/
Shipping calculated at checkout.

Notecarriers are companion development boards designed to make it easy to prototype and deploy IoT solutions with the Notecard.

Notecarrier XM is a small form-factor Notecarrier, only slightly larger than the Notecard itself. Notecarrier XM is our most minimal Notecarrier, containing essential circuitry for Notecard and a USB port for USB Serial access to the Notecard. Notecarrier XM was designed as a low-cost companion to Notecard LoRa and Notecard WiFi, though it can be used with any Notecard. Unlike other Notecarriers, Notecarrier XM does not include an external SIM slot. 

Included is a flexible Molex 209142 antenna for use with either LTE or GPS. If you require a dual LTE/GPS antenna, we recommend adding on the flexible LTE+GPS antenna (or you may choose to use your own preferred antenna). Our loose header pins are also included.

Notecarriers require a Notecard to function. Notecarrier XM is compatible with all available Notecards. See the Notecards section for more details or get started with a Blues Starter Kit.

Key Notecarrier XM Specs

  • Notecard M.2 Key E connector socket and mounting screw receptacle.

  • USB C port to power Notecarrier and provide a USB Serial command interface to Notecard.

  • DIP switch for using active or passive GPS/GNSS antenna.

Additional Resources

Notecarrier XS

$15.00
/
Shipping calculated at checkout.

Notecarriers are companion development boards and designed to make it easy to prototype and deploy IoT solutions with the Notecard.

Notecarrier XS is the companion Notecarrier to Starnote and Notecard, providing a platform for prototyping with Satellite failover. Notecarrier XS includes two M.2 Key E connector sockets and internal connectivity for Notecard to Starnote communication. Notecarrier XS also includes JST connectors for LiPo battery and charging support, as well as Qwiic and ESLOV ports for connecting Notecard to host MCUs over I2C.

Included is Flexible LTE, Wi-Fi, or GPS/GNSS Antenna. If you require a dual LTE/GPS antenna, we recommend adding on the flexible LTE+GPS antenna (or you may choose to use your own preferred antenna).

Notecarriers require a Notecard to function. The Notecarrier XS is compatible with Notecard Cellular, Notecard Cellular (Legacy), Notecard Cell+WiFi, and Notecard WiFi. See the Notecards section for more details or get started with a Starnote Starter Kit.

 

Key Notecarrier XS Specs

  • Notecard M.2 Key E connector socket and mounting screw receptacle.

  • Starnote M.2 Key E connector socket and mounting screw receptacle.

  • USB-C port to power Notecarrier and provide a USB Serial command interface to Notecard.

  • External Nano-SIM slot for use of an optional secondary SIM.

  • 2-Pin JST PH connectors for LiPo battery power and charging support.

  • 1 Qwiic/StemmaQT I2C port for attaching external peripherals.

  • 1 ESLOV port for attaching the Notecard to Arduino MKR or PRO boards.

Additional Resources

Notecarrier Pi Hat

$15.00
/
Shipping calculated at checkout.

Notecarriers are companion development boards designed to make it easy to prototype and deploy IoT solutions with the Notecard.

Notecarrier Pi is designed for drop-in development with a Raspberry Pi or compatible Single Board Computer. It includes a pre-soldered female 40-pin header connector for plugging directly into the Raspberry Pi, and a 40-pin connector on top for stacking other Pi “hats” and devices. It also includes two Qwiic I2C ports for attaching external peripherals.

Included is a flexible Molex 209142 antenna for use with either LTE or GPS. If you require a dual LTE/GPS antenna, we recommend adding on the flexible LTE+GPS antenna (or you may choose to use your own preferred antenna).

Notecarriers require a Notecard to function. Notecarrier Pi Hat is compatible with all available Notecards. See the Notecards section for more details or get started with a Blues Starter Kit.

Key Notecarrier Pi Specs

  • Notecard M.2 Key E connector socket and mounting screw receptacle.
  • 2 Qwiic I2C ports for attaching external peripherals to your project.
  • Pre-soldered female 40-pin header connector for plugging directly into a Pi or another Pi hat.
  • Pre-soldered male 40-pin header connector for stacking additional Pi hats.
  • External Nano-SIM slot for use of an optional secondary SIM.

Additional Resources

Notecard Cellular (Narrowband)

$45.00
/
Shipping calculated at checkout.

Featuring an improved STM32 MCU, an onboard dual SIM capability, and an improved Low IQ power supply, Notecard Cellular is a drop-in functional replacement for original "Green" Notecard at a lower price.

Notecard is a device-to-cloud data pump that reduces the complexity of building connected solutions with secure, reliable cellular. As an embeddable system on module (SoM), Notecard can be used with any microcontroller for both greenfield and retrofit projects using your own design, or one of our custom designed Notecarriers.

With just two lines of code you can send data to the cloud in minutes, with no complex device registration or provisioning required. With a powerful JSON-based API, you can program Notecard over USB, or control it from your preferred microcontroller or single-board computer using one of our open-source firmware libraries. Connect from your preferred host to Notecard using Serial or I2C.

Notecard is designed to work with a cloud service for ingesting and processing device data. Notehub provides secure device connectivity, project and fleet management, and simple routing to 3rd party cloud services.

Notecard is meant to be used with a Notecarrier. Notecard Cellular (Narrowband) is compatible with all available Notecarriers. See the Notecarriers section for more details or get started with a Blues Starter Kit.

Ordering Note: Notecards purchased from the Blues Shop will ship with a Developer Firmware Release version pre-installed. If you require a Long-Term Support (LTS) version for a Shop order, please contact Sales for assistance.

Available Variations

Key Notecard Cellular Specs

  • Includes a secure element with a factory-installed ECC P-384 certificate, provisioned at chip manufacture.

  • Integrated GPS and accelerometer.

  • Designed to operate on battery power, be "always-on" to maintain time and location, while typically drawing less than 8µA@5V, when idle.

  • Bundled with 10 years of service and 500MB of cellular data.

  • No cellular subscriptions, SIM fees, or monthly minimums apply.

  • PTCRB Certified Module.

Additional Resources

Notecard Cell+WiFi (Narrowband)

$49.00
/
Shipping calculated at checkout.

Notecard is a device-to-cloud data pump that reduces the complexity of building connected solutions with secure, reliable cellular and WiFi. As an embeddable system on module (SoM), Notecard can be used with any microcontroller for both greenfield and retrofit projects using your own design, or one of our custom designed Notecarriers.

Notecard Cell+WiFi (Narrowband) allows for dynamic fallback from WiFi to cellular and indoor location tracking via WiFi Triangulation.

With just two lines of code you can send data to the cloud in minutes, with no complex device registration or provisioning required. With a powerful JSON-based API, you can program Notecard over USB, or control it from your preferred microcontroller or single-board computer using one of our open-source firmware libraries. Connect from your preferred host to Notecard using Serial or I2C.

Notecard is designed to work with a cloud service for ingesting and processing device data. Notehub provides secure device connectivity, project and fleet management, and simple routing to 3rd party cloud services.

Notecard is meant to be used with a Notecarrier. Notecard Cell+WiFi (Narrowband) is compatible with all available Notecarriers. See the Notecarriers section for more details or get started with a Blues Starter Kit.

Ordering Note: Notecards purchased from the Blues Shop will ship with a Developer Firmware Release version pre-installed. If you require a Long-Term Support (LTS) version for a Shop order, please contact Sales for assistance.

Available Variations

    Key Notecard Cell+WiFi (Narrowband) Specs

    • Includes a secure element with a factory-installed ECC P-384 certificate, provisioned at chip manufacture.
    • Integrated GPS and accelerometer.
    • Designed to operate on battery power, be "always-on" to maintain time and location, while typically drawing less than 8µA@5V, when idle.
    • Bundled with 10 years of service and 500MB of cellular data.
    • No cellular subscriptions, SIM fees, or monthly minimums apply.
    • PTCRB Certified Module.
    • Includes a 2.4 GHz WiFi module with WiFi to Cellular fallback capabilities.

    Additional Resources