We at SILA Embedded Solutions GmbH believe that, in order to develop a good product for a given application, it is key to understand the application and application requirements. With our strong background in industrial electronics and optical/electrochemical sensors and control engineering we can quickly understand your application problem.
This ensures that, together with our customers, we develop the right solution from the beginning, delivering a cost effective and competitive product within a minimal timeframe. Due to the strict quality requirements on industrial products, we can also support our customers with lifetime prediction, FMEA analysis and certifications.

SILA Embedded Solutions GmbH has the following key expertise for development of industrial control products

  • Digital signal processing and control systems.

  • Industrial fieldbus communication including Profibus, MODBUS, Ethernet and others.

  • Requirements engineering and specifications

  • FMEA analysis

  • Review of electronic products according to IEC61508

  • Life-time and fitness evaluation according to SN29500 and MIL-HDBK-217

  • Expertise in certifying products for a global market including cTUVus, UL, CE, ATEX and others.


Membrane less optical microphones show a huge potential in industrial applications due to their excellent robustness to electromagnetic interference and temperature. A key element of such an optical microphone is a digital controller which stabilizes the DC operating point and cancels low frequency interference as the microphone is also sensitive to static pressure changes, e.g. by temperature, altitude, etc. SILA Embedded Solutions has developed a suitable low noise digital controller, which can operate in real-time up to 200 kHz using a Cortex M4/DSP with fixed point floating point. The implemented solution includes multi-rate signal processing where sample rate up/down conversion is employed to implement low frequency control loops. For high frequency interference rejection, the digital controllers operate at the maximum sampling frequency. In addition, a suitable design flow using MATLAB has been developed which allows the simulation of the open and closed control loop including code generation for the embedded systems. Our customer benefited from our combined expertise in audio and control engineering.

Industrial control terminals have changed from simple 32-Bit microcontroller systems with an RTOS to fully fledged x86 and/or ARM platforms running Linux and/or Windows. SILA Embedded Solutions GmbH has developed multiple baseboards for ETX and Q-Seven including wireless and 3G connectivity. The developed baseboard also included application specific I/O interfaces like 0/4-20mA loops, ethernet and sensor power supplies.

Additional information

Although analog microphones for professional use have come a long way ,development is still continuing and manufacturers strive for even lower noise and a higher dynamic range while at the same time integrating more and more functions, previously only available on digital microphones. Having only limited power and noise levels below the microvolt range is a challenging task as any new component, especially microcontrollers, adds a risk that could lower circuit performance. Together with our customer, we have developed one of the most versatile analog microphones with the lowest noise ratios and the highest dynamic range available [see reference].
In the past few years, digital audio products using USB and/or Bluetooth have increased in popularity. SILA has developed some of the finest wired digital audio devices supporting USB 2.0 asynchronous audio; offering Apple MFI certification, and integrated DSP functionality within a single microphone [see reference]. Wireless products, including Bluetooth headsets and speakers, have been successfully designed, developed, and brought to market for many customers. No part of a product development would be complete without a successful transition to production. At SILA we are proud of our equipment and knowledge in this key area of product development and can help you with all aspects of this development stage. 
Whether it is certification, compliance testing, test automation, cost reduction, or determination of specifications according to IEC standards, let SILA design a solution for you.

SILA Embedded Solutions is the perfect partner for any development in any of the following areas

  • Electronics for ultra low-noise and high dynamic range condenser capsule microphones

  • Electronics for dynamic microphones

  • Microphone preamplifiers

  • Electronics for tube microphones

  • Ultra low noise power supplies and high voltage power supplies for audio products.

  • Bluetooth microphones and headsets

  • Digital USB microphone products

    USB 2.0 asynchronous audio
    Apple MFI certified equipment (SILA has an Apple MFI development license)
    USB 2.0 full-speed and high-speed certification
    USB 2.0 cable design including Apple certified cables
  • Digital signal processing

  • Digital networking technologies

    including AES-67, Dante and AES-42
  • Technology evaluation, design reviews and troubleshooting of audio products

  • Acoustic measurements according to national/global standards (E.g. IEC).

  • Measurement and production optimization

    Production optimization with Audio Precision Equipment
    Measurements according to various IEC standards using G.R.A.S reference microphones, audio precision, Nordic sound calibrators, low noise preamplifiers with phantom supplies, and custom developed devices for measurement according to IEC-60268-4.
    Verification of published microphone specifications
    Cost and/or yield optimization


With an electronic self-noise of approximately 0dB in combination with a superior dynamic range exceeding 135dB, the microphone has positioned itself as one of the leading products. SILA Embedded Solutions not only provided the necessary simulations, schematics and designs, but also helped the customer to successfully introduce the product to production. Due to a dedicated production interface and the integrated microcontroller tolerances, the sensitivity of the products are automatically minimized with different polarization voltages for all operating modes. 
Digital USB based audio has become an important and vital part of the audio industry. SILA Embedded Solutions took a leading role in the development of an Apple MFI certified USB 2.0 high-speed asynchronous microphone. From the beginning we helped with the evaluation of a suitable technology platform, development of the hardware and firmware. Furthermore, we worked in close cooperation with mechanical and design engineers to develop suitable mechanical enclosures with shielding and EMC requirements of today’s digital products. Specification and development of custom USB 2.0 high-speed certified cable was also part of the project. The product developed was a stereo X/Y microphone with optional cardioid recording mode and a stereo line input. It is based on the XMOS multicore platform and supports sample rates up to 96kHz with up to 24-bit. In addition, it supports low latency direct monitoring as well as ASIO support under windows in combination with a custom control panel.
SILA has developed a development kit for the CSR bluetooth module which was used as a basis for firmware development and for verification of circuit performance. Availability of a development kit in parallel with the miniaturized version of the PCB can greatly reduce the development time by allowing proper debugging while still ensuring that the final product meets design and cost requirements.

Additional information

 Our MODBUS master stack is currently available on the following platforms:
  • Atmel AVR (ASCII and RTU)
  • Atmel SAM3S, SAM3N, SAM3X / Cortex M3 (ASCII and RTU)
  • TI Luminary Micro / Cortex M3 (ASCII and RTU)
  • TI MSP430 (ASCII and RTU)
  • Microchip PIC18F
  • ST STR711 / ARM7 (ASCII and RTU)
  • ST STM32 Cortex M3 (ASCII and RTU)
  • Renesas M16C
  • Freescale KL25
  • Luminary Micro Cortex M3 with FreeRTOS/lwIP (ASCII, RTU and TCP)
  • NXP LPC17XX with FreeRTOS/lwIP (ASCII, RTU and TCP)
  • Atmel AT91SAM7X / ARM7 (ASCII and RTU)
  • Atmel AVR
  • Coldfire (ASCII and RTU)
  • x86 (ASCII, RTU, TCP and UDP)

Modbus Master Main Features

  • No Royalties

  • Supports multiple instances on a single platform

  • Core stack is 100% tested using automatic code testing utilities

  • Sample application

  • Source code is included

  • Very low resource overhead (few kilobytes of flash and a few hunderd bytes of RAM for RTU/ASCII)

  • Supports all MODBUS standards (RTU/ASCII and TCP/UDP)

  • Supports all important MODBUS Funtion codes

  • Fully documented API with an HTML documentation

Additional Information and online purchase

Bereich für noch mehr Content!

No Royalties

Supports multiple instances on a single platform

Core stack is 100% tested using automatic code testing utilities

Sample application

Source code is included

Very low resource overhead (few kilobytes of flash and a few hunderd bytes of RAM for RTU/ASCII)

Supports all MODBUS standards (RTU/ASCII and TCP/UDP)

Supports all important MODBUS Funtion codes

Fully documented API with an HTML documentation

Being the industry standard since 1979, millions of devices use MODBUS for reliable industrial communication. MODBUS is an application level protocol positioned at level 7 of the Open Systems Interconnection (OSI) model. It supports client/server communication between devices connected on RS485/RS422 or TCP/IP networks.
MODBUS is a request/reply protocol where different functions provide a set of standardized services and, if required, can be extended by application-specific services. The standardized services include a pre-defined data model suitable for the exchange of analog and digital information. 
The four primary elements of the data model are:
  • 1-bit read only discrete inputs (e.g. the state of a digital input)
  • 1-bit read/write coils (e.g. an digital output)
  • 16-bit read only input registers (e.g. the value of an analog input)
  • 16-bit read/write holding registers (e.g. the analog output value of an actuator)
In addition, the standard includes a large set of supporting diagnostic services and additional data types (File records, FIFOs, etc.).


  • No product royalties

  • Full source code provided

  • Support two different serial APIs optimally supporting RTOS/no RTOS operating systems.

  • Conforming to MODBUS application protocol V1.1


  • Supports MODBUS TCP

  • Supports MODBUS UDP

  • Low resource overhead with only a few kilobytes of flash and ~300 bytes of RAM per instance

  • Supports multiple instances on a single platform

  • MASTER and SLAVE stack share the same porting layer

  • MASTER and SLAVE stack can run in parallel

  • An unlimited number of MODBUS slave devices can be polled
  • Supports a blocking and non-blocking API
  • Optimized ports for Windows/Linux resulting in low RTU round trip times allowing the polling of a large number of devices
  • Can be extended by custom function codes
  • Supports MODBUS TCP/RTU gateway mode (requires master license)
  • Optimized ports for Windows/Linux which uses RTU frame inspection and runtime CRC checking resulting in low RTU round trip times
  • Can be extended by custom function codes
  • Embedded platforms with no operating systems (AVR, MSP430, PIC32, ARM Cortex (Atmel, Freescale, ST, NXP and others), 8051 and others
  • Embedded platforms with RTOS (FreeRTOS, ucOS-II, Keil RTX and others
  • Operating systems (Windows, Linux and others)

MODBUS Master online purchase & free evaluation version:

MODBUS Slave online purchase & free evaluation version:

MODBUS documentation: