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HMI - Human Machine Interface
Wireless technology transforming the user experience in industrial devices.
Overview
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Overview
Wireless human-machine interface (HMI) for industrial applications
Industrial field devices are traditionally provisioned, programmed and diagnosed using complex local user interfaces and cable-connected PC programs. Bluetooth is an ideal technology for future HMIs. Using Silicon Labs pre-certified Bluetooth modules and mobile application tools allow streamlined user experience modernization and fast time to market.
How wireless technology can transform your user experience
A HMI for an industrial field device introduces imposes a great design challenge. Traditionally, the designers are limited in physical space, they need to consider the environmental conditions, and any ports for external connections require galvanic isolation for safety. To resolve these challenges, the designers have to make trade-offs that can adversely impact the user experience because of the multiple compromises made during the design process. Complex user interfaces lead to poor perceived usability and the users may opt not to use the full capability of the device because of difficulty in configuring, operating or maintaining.
The use of Bluetooth technology in industrial field devices is still in its infancy, however, it is gradually gaining more footprint due to its superior benefits over the traditional design approaches. Modern Bluetooth pre-certified modules include everything that is needed to build an intuitive user experience. The modules come also in very small form factors, which means that they can be integrated into even space-constrained devices. The modules sizes are starting at 6 x 6 mm. The power consumption of Bluetooth modules is optimized to a level, where it is a feasible option for battery-operated devices.
Bluetooth is a wireless technology, which means that external connections between the field device and the user's end device do not require galvanic isolation. This can provide substantial reductions in materials costs. It also reduces the testing and validation as there are less exposed interfaces that would have to be verified for safety. Because of the wide adoption of Bluetooth technology, it enables use of various portable devices as the user interface to the device. When the designers are no longer restricted to a couple of pushbuttons and a small display, they can deliver user interfaces to the customers that highlight the product benefits and allow better differentiation against the competition.
Industrial devices can be installed in challenging environments, where the devices can be exposed to dust, salt water, humidity, and other conditions. Any inlet that goes through the device enclosure needs to be carefully designed and protected. With a Bluetooth-based HMI, the physical connectors, pushbuttons, and screens can be minimized simplifying the device design. From the customer point of view, they have fewer things to maintain, which drives cost savings for them. The field devices may also be installed in hard to reach locations, which makes conventional cable-based interfaces cumbersome to use. With Bluetooth, the user can take a remote connection to the device from a safe position using a handheld device.
Often the external connections from an industrial field device are based on RS-232 serial communications due to its versatility and widely available components. These types of interfaces present an excellent opportunity for wireless. Bluetooth modules that take standard UART as an input and require zero Bluetooth programming knowledge are an excellent option for HMI innovation. In addition to the pre-certified modules, the mobile applications used as the primary user interfaces are a key factor in the time-to-market and development costs. Pre-determined mobile application frameworks that abstract the Bluetooth operations substantially simplify the design process and reduces the development time.
Silicon Labs offers a broad portfolio of pre-certified Bluetooth modules for human machine interface applications, including the world’s smallest system-in-package Bluetooth module for space constrained designs. Our developer tools include mobile integration software designed to expedite application development. Our Bluetooth Xpress products and their mobile application frameworks are ideal for transforming an existing human-machine serial interface into a robust, future-proof user experience.
Human Machine Interface Block Diagram
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EFR32BG21 Series 2 Bluetooth Low Energy (SoC) - EFR32BG21
EFR32BG21 Series 2 Bluetooth Low Energy (SoC) - EFR32BG21
Wireless Gecko Series 2 devices are the next evolution of Wireless Gecko devices bringing high performance, low power, and secure solutions to the Internet of Things. Designed to increase processing capability, improve RF performance and lower active current, the devices also provide the highest level of IoT device security. The EFR32BG21 devices are also designed to support Silicon Labs' enhanced security option, Secure Vault. Learn more about Silicon Labs' security portfolio.
EFR32BG21 devices are 2.4 GHz wireless SOCs optimized for line-powered Bluetooth Low Energy and Bluetooth mesh applications, including connected lighting, smart plugs, gateways and voice assistants. An 80 MHz ARM® Cortex®-M33 core provides plenty of processing capability while an integrated security subsystem provides leading security features that greatly reduce the risk of IoT security breaches and compromised intellectual property. With better than -104.3 dBm sensitivity and up to +20 dBm output power, the EFR32BG21 family uses Simplicity Studio 5 development tools, providing easy migration and fast time-to-market with development kits, SDKs, mobile apps, our energy profiler and patented network analyzer.


EFR32BG22 Series 2 Bluetooth Low Energy (SoC)
EFR32BG22 Series 2 Bluetooth Low Energy (SoC)
EFR32BG22 and EFR32BG22E Bluetooth low energy (LE) wireless SoC solutions are part of the Wireless Gecko Series 2 platform. These devices are designed with a strong focus on energy efficiency, offering best-in-class ultra-low transmit and receive power, and a high-performance, low-power Arm® Cortex®-M33 core delivers industry-leading energy efficiency that can extend coin cell battery life up to ten years. Where BG22 allows you to create energy-efficient applications, the BG22E – ‘E’ denoting Energy Conservation – takes this a step further by enhancing battery longevity and supporting designs that eliminate the need for batteries altogether. Our BG22 and BG22E family's are the ideal market leading SoCs for Ambient IoT or Energy Harvesting devices. Target applications include Bluetooth mesh low-power nodes, smart door locks, personal healthcare and fitness devices. Asset tracking tags, beacons and indoor navigation also benefit from the SoCs' versatile Bluetooth Angle of Arrival (AoA) and Angle of Departure (AoD) capabilities and sub-one-meter location accuracy.






EFR32MG21 Series 2 Multiprotocol Wireless SoC
EFR32MG21 Series 2 Multiprotocol Wireless SoC
EFR32MG21 devices bring high performance, low power and secure solutions to the IoT. Designed to increase processing capability, improve RF performance and lower active current, EFR32MG21 devices are 2.4 GHz wireless SoCs optimized for line-powered Zigbee, Thread and Bluetooth mesh applications, including connected lighting, gateways, voice assistants and smart metering.
The EFR32MG21 family of SoCs includes an integrated security subsystem and devices that can take advantage of Secure Vault technologies. Secure Vault delivers leading security software features with physically unclonable function (PUF) hardware technology to greatly reduce the risk of IoT security breaches and compromised intellectual property
With better than -104.3 dBm sensitivity for both 802.15.4 and Bluetooth Long Range and up to +20 dBm output power, EFR32MG21 provides a robust RF link to ensure reliable communications. EFR32MG21 uses Simplicity Studio 5 development tools, providing easy migration and fast time-to-market with development kits, SDKs, mobile apps and our patented network analyzer.






EFR32MG24 Series 2 Multiprotocol Wireless SoC
EFR32MG24 Series 2 Multiprotocol Wireless SoC
The EFR32MG24 Wireless SoCs are ideal for mesh IoT wireless connectivity using Matter, OpenThread and Zigbee protocols for smart home, lighting, and building automation products. With key features like high performance 2.4 GHz RF, low current consumption, an AI/ML hardware accelerator and Secure Vault™, IoT device makers can create the smart, robust, and energy-efficient products that are secure from remote and local cyber-attacks. An ARM Cortex®-M33 running up to 78 MHz and up to 1.5 MB of Flash and 256 kB of RAM provides resources for demanding applications while leaving room for future growth. Target applications include gateways and hubs, sensors, switches, door locks, LED lighting, luminaires, location services, predictive maintenance, glass break detection, wake-word detection, and more.



SiWx917M Wi-Fi 6 plus Bluetooth LE 5.4 Wireless SoCs
SiWx917M Wi-Fi 6 plus Bluetooth LE 5.4 Wireless SoCs
Our SiWx917M SoC is our lowest power Wi-Fi 6 SoC, ideal for ultra-low power IoT wireless devices using Wi-Fi®, Bluetooth, Matter, and IP networking for secure cloud connectivity. It is optimal for developing battery operated devices that need long battery life. SiWx917M SoC includes an ultra-low power Wi-Fi 6 and Bluetooth Low Energy LE 5.4 wireless CPU subsystem, and an integrated micro-controller (MCU) application subsystem, security, peripherals and power management subsystem all in a single 7x7 mm QFN package. The wireless subsystem consists of a Network Wireless Processor running up to 160 MHz, baseband digital signal processing, analog front end, 2.4 GHz RF transceiver and integrated power amplifier. The application subsystem consists of an ARM® Cortex®-M4F running up to 180 MHz, embedded SRAM, FLASH, and Sensor Hub. The ARM® Cortex®-M4F is dedicated for peripheral and application-related processing, while the network wireless processor runs the wireless and networking stacks on independent threads, thus providing a fully integrated solution that is ready for a wide range of embedded wireless IoT applications.
Target applications include Smart Homes, Consumer Health and Wearables, Medical, Industrial, Retail, Smart Building and Cities, Asset Tracking.
Additional Products and Services

Machine Learning
Silicon Labs offers ML development tools for any level of experience and suited to your specific application.

Security
To stay secure, device makers need an underlying security platform in the hardware, software, network, and cloud.

CPMS
Custom Part Manufacturing Service allows customization of wireless SoCs, modules, and MCUs at the factory.

SDK Support
Reduce your software development costs by having support for critical security patches and bug fixes for up to 10 years.
Resources
Additional Resources and Documentation

Community
Browse technical support forums, knowledge base articles and example code.

Software Reference Documentation
Develop and prototype smarter. Get to market faster.

GitHub
Explore repositories and sample code libraries from Silicon Labs
Simplicity Studio
Get up and running quickly with precompiled demos, application notes and examples. Use advanced tools including energy profiling and network analysis to optimize your MCU and wireless systems.
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