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Amazon Alexa certified Espressif’s ESP AFE for ESP32-S3 AI & DSP

Amazon’s website has introduced a Software Audio Front End (AFE) Development Kit section that lists software algorithms that optimize sound detection in noisy environments. The latest addition is the Amazon Alexa recently certified Espressif audio front end or ESP AFE algorithm for shorts.

The Espressif AFE algorithm was certified by Amazon after achieving excellent performance in long-range Alexa testing. In most cases, in low signal-to-noise scenarios, the wakeup rate reaches 100% and the speech recognition rate exceeds 90%.

Amazon-Qualified “Software Audio Front-End” Solution

Low resource consumption

Espressif’s AFE algorithms are optimized, as they take advantage of Espressif’s AI accelerator that is available in the ESP32-S3 SoC. Espressif’s AFE algorithms consume just 12-20% of CPU and around 460 KB of memory, including 220 KB of internal memory and 240 KB of external memory. This provides sufficient headroom for customer applications on the ESP32-S3 SoC.

Espressif’s AFE algorithms offer an easy and intuitive API for customer applications, so that their performance can change as dynamically as it is required. The distance between the two microphones can be between 20-80 mm, which allows considerable flexibility for the hardware design of developers’ end-products.

Source: https://www.espressif.com/en/solutions/audio-solutions/esp-afe

Industrial use of ESP32-based solutions

One of industrial IoT devices, supporting Espressif’s ESP32 technology is eModGATE from TECHBASE. Economical, ESP32-based solution can serve as an end-point in any installation or works well as a gateway, gathering data from scattered sensor mesh across the installation. For more information and also Raspberry Pi based solutions check Industrial IoT Shop with all the configuration options for eModGATE.

eModGATE with ESP32
Check eModGATE options
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ESP32 Pi-oT ESP Module platform for Industrial IoT

The creators of the Pi-oT module returned to Kickstarter and launched a new module based on ESP32. Thanks to this, users familiar with Arduino programming or preferring lighter architecture can enjoy all the advantages of the IoT module for enterprises.

Pi-oT ESP module key features and specification:

  • Board – ESP32-DevKitC-D32 based on ESP32-WROOM-D32 module with ESP32 dual-core processor, 32Mbit SPI flash
  • Relays – 4x Panasonic SPDT relays controlled via GPIO pins
  • Screws terminals for
    • Relay outputs
    • 6x analog inputs configurable as GPIO if needed
    • 2x analog outputs configurable as GPIO if needed
    • 2x GPIO
    • 5V input, 3.3V, and GND
  • Power Supply – 5V input via terminal or Micro USB port?; 5V circuitry protection
  • Dimensions – DIN rail enclosure

Source: https://www.cnx-software.com/2020/05/04/pi-ot-esp-module-leverages-esp32-screw-terminals-iot-automation/

The ESP Module is a microcontroller based IoT Module which offers the same great features as our Pi-oT Module, but based off on an ESP32 platform. The ESP Module is powered by an ESP32 DEVKITC-32D microcontroller which is included in each reward.

Source: https://www.kickstarter.com/projects/pi-ot/esp-module

Additionally 10 GPIO pins are routed to the housing terminals to utilize the power of ESP32 in a wide range of applications. The flexibility of the ESP32s system allows easy configuration of 6 of these pins as analogue inputs and 2 as analogue outputs.

Industrial use of LoRa & ESP32-based solutions

One of industrial IoT devices, supporting LoRa wireless technology is ESP32 based eModGATE from TECHBASE. Economical, ESP32-based solution can serve as an end-point in any installation or works well as a gateway, gathering data from scattered sensor mesh across the installation. For more information and also Raspberry Pi based solutions check Industrial IoT Shop with all the configuration options for eModGATE.

eModGATE with ESP32
Check eModGATE options
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Increased demand on the TPM 2.0 modules with Windows 11 announcement

Microsoft announced Windows 11 with new system requirements, including hardware with a TPM 2.0 chip. Altho not all computers, laptops, and tablets come with Trusted Platform Module (TPM), which can be a problem, especially if you need version 2.0.

According to a tweet from Shen Ye, Senior Director, Global Head of HTC Hardware Products, the price of TPM 2.0 has quadrupled, so while Windows 11 isn’t officially available yet, Microsoft has it legitimate, and the name is security.

Securing devices with Infineon industrial grade TPM

Infineon Technologies AG has unveiled a new security chip that defines the first TPM (Trusted Platform Module), designed specifically for industrial applications such as industrial computers, servers, industrial controllers and edge gates. The module protects confidential data in connected devices and reduces the risk of leakage of this information due to attacks, e.g. hackers.

IoT Security with latest SLM 9670 Industrial Grade TPM 2.0
Source: https://www.avnet.com/wps/portal/silica/products/product-highlights/2019/infineon-optiga-tpm-slm-9670/

The OPTIGA TPM SLM 9670 module protects the integrity of industrial systems and the identity of users using them. The system controls access to sensitive data at key locations in industrial environments, such as an automated factory. It also protects the cloud interface if the network uses one. The security system fully meets the TPM 2.0 standard developed by the Trusted Computing Group and is certified by an independent test laboratory in accordance with the criteria contained in this standard. The new module is meticulously controlled and certified by Infineon. Thanks to its use, it is possible to shorten the time of designing and introducing the device to the market, thanks to the ready security solution in the system.

The TPM system has a lifetime declared as 20 years. It allows programmers to perform firmware updates, which in turn enables them to meet the long-term security requirements in rapidly changing industrial environments. In this way, it can also reduce maintenance costs of industrial equipment thanks to secured remote software updates. The TPM chip will be available in serial production in the second half of 2019.

TPM 2.0 Key Features

  • Random Number Generator (RNG) according to NIST SP800-90A
  • TPM FW update functionality installed
  • 6962 Bytes of free NV memory
  • Full personalization with Endorsement Key (EK) and EK certificate
  • Up to 3 keys in the volatile memory
  • Up to 7 keys in the NV memory
  • Up to 8 NV counters
  • Support of various cryptographic algorithms:
    • RSA-1024 and RSA-2048
    • SHA-1 and SHA-256
    • ECC NIST P256
    • ECC BN256

Security chip implementation in Industrial IoT devices

With knowledge of latest Industrial IoT security measures, the choice of proper end-point conroller or gateway is much easier than you think. Some manufacturers can implement TPM 2.0 security chip in production process, to allow users to generate certification keys after purchase, maximizing security of their installations. TECHBASE offers wide range of solutions, optionally aided with TPM system.

  • eModGATE with ESP32
  • ModBerry 500 with Raspberry Pi’s Compute Module 3+
Industrial devices with TPM 2.0 support

For example, ESP-32 based solution, Moduino X series and eModGATE series products offer the support for such security measures. Read more in Industrial IoT Ecosystem brochure, to understand the importance of reliable and secure hardware for Industrial IoT.

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M5Stack Core2 with Amazon Web Services alternative to ESP32 devices

The M5Stack Core2 is an ESP32 IoT development kit with a 2-inch touchscreen, motion sensor, microphone and battery. The hardware is chosen by Amazon Web Services, with a few little things like adding secure components and the yellow colour that creates „AWS IoT EduKit” hardware and software solutions designed to“learn how to build IoT applications using AWS services through a prescriptive learning program”.

M5Stack Core2 for AWS IoT EduKit specifications:

  • SoC – Espressif ESP32-D0WDQ6-V3 dual-core Xtensa LX6 processor clocked at up to 240MHz with 520KB SRAM, Wi-Fi, and dual-mode Bluetooth connectivity
  • External Memory – 8MB PSRAM
  • Storage – 16MB flash storage, MicroSD card slot up to 16GB
  • Display – 2-inch IPS LCD screen with 320×240 resolution (ILI9342C driver), and touchscreen support (via FT6336U controller)
  • Audio – Built-in 1W speaker, SPM1423 PDM microphone, I2S codec, and power amplifier
  • Antenna – 2.4GHz 3D antenna
  • USB – 1x USB Type-C port for power and programming via CP2104 chip
  • Sensors – 6-axis IMU (MPU6886)
  • Expansion – 1x Grove connector with I2C, GPIO and UART, M-Bus socket
  • Security – ATECC608A Trust&GO secure element
  • Misc – Power LED, power button, reset button, 3x touch buttons, vibration motor, RTC, 10x RGB LEDs
  • Power Supply
    • Input Voltage – 5V @ 500mA
    • AXP192 PMU
    • SY7088 DC-DC Boost
    • 500 mAh/3.7V Lithium Battery
  • Dimensions – 54 x 54 x 24 mm (Plastic case)
  • Weight – 101 grams
  • Temperature Range – 0°C to 40°C

Source: https://www.cnx-software.com/2020/12/29/aws-iot-edukit-leverages-m5stack-core2-esp32-hardware/

A look into the features of Toit programming language

Unlike other programming languages used for embedded systems, Toit is a language that was developed solely for IoT. So, it is a dedicated language for IoT that allows for better power management which is important for battery-based systems. Toit features an automatic memory management system which helps to avoid crashes. The new language also comes with a garbage collector, aiding the memory management system. Features like these are not available in traditional programming languages and might be a challenge implementing those using languages like C.

“With Toit, we wanted to create a high-level language that would avoid the limitations of the existing languages used in IoT development. On top of this, the Toit language had to be intuitive to learn and safe to use.” says the Toit team. The syntax of Toit is modern, simple and quite similar to Python. So, a Python developer can easily learn this new language within a few hours and deploy their first application within 15 minutes. Toit is an indentation based language just like Python and has no braces or semicolons. The files are saved with ‘.toit’ extensions and have a VS code language extension for a richer developing experience. So once you start developing with the Toit platform, there’s no coming back.

Source: https://opencloudware.com/toit-platform-redefines-the-way-we-implement-iot-applications/

Industrial use of ESP32-based solutions

One of industrial IoT devices, supporting Espressif’s ESP32 technology is eModGATE from TECHBASE. Economical, ESP32-based solution can serve as an end-point in any installation or works well as a gateway, gathering data from scattered sensor mesh across the installation. For more information and also Raspberry Pi based solutions check Industrial IoT Shop with all the configuration options for eModGATE.

eModGATE with ESP32

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ESP32 Pi-oT ESP Module platform for Industrial IoT

The creators of the Pi-oT module returned to Kickstarter and launched a new module based on ESP32. Thanks to this, users familiar with Arduino programming or preferring lighter architecture can enjoy all the advantages of the IoT module for enterprises.

Pi-oT ESP module key features and specification:

  • Board – ESP32-DevKitC-D32 based on ESP32-WROOM-D32 module with ESP32 dual-core processor, 32Mbit SPI flash
  • Relays – 4x Panasonic SPDT relays controlled via GPIO pins
  • Screws terminals for
    • Relay outputs
    • 6x analog inputs configurable as GPIO if needed
    • 2x analog outputs configurable as GPIO if needed
    • 2x GPIO
    • 5V input, 3.3V, and GND
  • Power Supply – 5V input via terminal or Micro USB port?; 5V circuitry protection
  • Dimensions – DIN rail enclosure

Source: https://www.cnx-software.com/2020/05/04/pi-ot-esp-module-leverages-esp32-screw-terminals-iot-automation/

The ESP Module is a microcontroller based IoT Module which offers the same great features as our Pi-oT Module, but based off on an ESP32 platform. The ESP Module is powered by an ESP32 DEVKITC-32D microcontroller which is included in each reward.

Source: https://www.kickstarter.com/projects/pi-ot/esp-module

Additionally 10 GPIO pins are routed to the housing terminals to utilize the power of ESP32 in a wide range of applications. The flexibility of the ESP32s system allows easy configuration of 6 of these pins as analogue inputs and 2 as analogue outputs.

Industrial use of LoRa & ESP32-based solutions

One of industrial IoT devices, supporting LoRa wireless technology is ESP32 based eModGATE from TECHBASE. Economical, ESP32-based solution can serve as an end-point in any installation or works well as a gateway, gathering data from scattered sensor mesh across the installation. For more information and also Raspberry Pi based solutions check Industrial IoT Shop with all the configuration options for eModGATE.

eModGATE with ESP32
Check eModGATE options
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Qualcomm 212 LTE IoT world’s most power-efficient LTE modem

A few years ago, Qualcomm launched the Snapdragon 212 processor for smart speakers. This post has nothing to do with this, but strangely enough, the company has decided to reuse the 212 number in its new Qualcomm 212 LTE IoT modem, „World’s most power-efficient single-mode 3GPP Release 14 NB2 (NB-IoT) modem„, as read.

Qualcomm 212 LTE IoT modem requires less than 1 microamp (1uA) sleep current and has a very low cutoff at system level (on the order of 2.2V) with the ability to adjust energy consumption for various source power levels It is said to support voltage.

Qualcomm 212 LTE IoT Modem specifications:

  • MCU Core – Arm Cortex M3 @ up to 204 MHz
  • Cellular Connectivity
    • 3GPP Rel.14 LTE capabilities: Cat-NB2 with multi-carrier NPRACH and Paging, Cat-NB2 Release Assistance Indication (RAI), Cat-NB2 with larger TBS and 2 HARQ processes
    • Peak Speeds – DL: 127 kbps; UL: 158.5 kbps
    • Frequency Bands (700Mhz to 2.1 GHz for global roaming)
      • LTE low bands: B5, B68, B8, B12, B13, B14, B17, B18, B19, B20, B26, B28, B71, B85
      • LTE mid bands: B1, B65, B70, B2, B25, B66, B3, B4
    • Global Emergency Services Support – ECID, OTDOA (LTE-based positioning)
  • Network Protocols – IPv4/IPv6 stack with TCP and UDP, TLS, HTTPS, PPP, SSL, DTSL, FTP, ping, HTTTP, MQTT, OMA Lightweight M2M, CoAP
  • I/O Interfaces – 2x I2C, 2x SPI, 3x UART, up to 26 GPIOs, 4-channel ADC
  • Security – Hardware-based Crypto Engine, Secure Key provisioning, Secure Boot
  • Integrated Chipsets
    • Qualcomm 9205 baseband IC
    • SMB231 charger IC
    • PME9205 power management IC
    • SDR105 radio transceiver and front-end IC
    • WCD9306 audio codec IC
  • Supply Voltage – 2.2V to 4.5V
  • Temperature Range – -40 to 85°C
  • Package – < 10x10mm

Source: https://www.qualcomm.com/products/qualcomm-212-lte-modem

Industrial use of LTE modems

With Compute Module 3+ options from Raspberry Pi, TECHBASE upgraded their ModBerry 500/9500 industrial computers. From now on the ModBerry 500/9500 can be supported with extended eMMC, up to 32GB. Higher memory volume brings new features available for ModBerry series. ModBerry supports wide range of industrial grade extension cards, i.e. wireless modems with 3G/LTE, NarrowBand-IoT, LoRa, Wireless M-Bus, ZigBee, WiFi, Bluetooth and many more.

ModBerry 500 with Compute Module 3+
ModBerry 500 with Compute Module 3+

Higher performance of ModBerry 500/9500 with extended eMMC flash memory, up to 32GB , powered by quad-core Cortex A53 processor allows the device to smoothly run Windows 10 IoT Core system, opening up many possibilities for data management, remote control and visualisation.

Check Industrial use of Compute Module
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Increased demand on TPM 2.0 modules with Windows 11 announcement

Microsoft announced Windows 11 with new system requirements, including hardware with a TPM 2.0 chip. Altho not all computers, laptops, and tablets come with Trusted Platform Module (TPM), which can be a problem, especially if you need version 2.0.

According to a tweet from Shen Ye, Senior Director, Global Head of HTC Hardware Products, the price of TPM 2.0 has quadrupled, so while Windows 11 isn’t officially available yet, Microsoft has it legitimate, and the name is security.

Securing devices with Infineon industrial grade TPM

Infineon Technologies AG has unveiled a new security chip that defines the first TPM (Trusted Platform Module), designed specifically for industrial applications such as industrial computers, servers, industrial controllers and edge gates. The module protects confidential data in connected devices and reduces the risk of leakage of this information due to attacks, e.g. hackers.

IoT Security with latest SLM 9670 Industrial Grade TPM 2.0
Source: https://www.avnet.com/wps/portal/silica/products/product-highlights/2019/infineon-optiga-tpm-slm-9670/

The OPTIGA TPM SLM 9670 module protects the integrity of industrial systems and the identity of users using them. The system controls access to sensitive data at key locations in industrial environments, such as an automated factory. It also protects the cloud interface if the network uses one. The security system fully meets the TPM 2.0 standard developed by the Trusted Computing Group and is certified by an independent test laboratory in accordance with the criteria contained in this standard. The new module is meticulously controlled and certified by Infineon. Thanks to its use, it is possible to shorten the time of designing and introducing the device to the market, thanks to the ready security solution in the system.

The TPM system has a lifetime declared as 20 years. It allows programmers to perform firmware updates, which in turn enables them to meet the long-term security requirements in rapidly changing industrial environments. In this way, it can also reduce maintenance costs of industrial equipment thanks to secured remote software updates. The TPM chip will be available in serial production in the second half of 2019.

TPM 2.0 Key Features

  • Random Number Generator (RNG) according to NIST SP800-90A
  • TPM FW update functionality installed
  • 6962 Bytes of free NV memory
  • Full personalization with Endorsement Key (EK) and EK certificate
  • Up to 3 keys in the volatile memory
  • Up to 7 keys in the NV memory
  • Up to 8 NV counters
  • Support of various cryptographic algorithms:
    • RSA-1024 and RSA-2048
    • SHA-1 and SHA-256
    • ECC NIST P256
    • ECC BN256

Security chip implementation in Industrial IoT devices

With knowledge of latest Industrial IoT security measures, the choice of proper end-point conroller or gateway is much easier than you think. Some manufacturers can implement TPM 2.0 security chip in production process, to allow users to generate certification keys after purchase, maximizing security of their installations. TECHBASE offers wide range of solutions, optionally aided with TPM system.

  • eModGATE with ESP32
  • ModBerry 500 with Raspberry Pi’s Compute Module 3+
Industrial devices with TPM 2.0 support

For example, ESP-32 based solution, Moduino X series and eModGATE series products offer the support for such security measures. Read more in Industrial IoT Ecosystem brochure, to understand the importance of reliable and secure hardware for Industrial IoT.

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Embedded Linux SBC from BreadBee – industrial competitor to Raspberry Pi

There are many small and compact Arm Linux SBCs, starting from the NanoPi NEO to the Raspberry Pi Zero or Rock Pi S, but lately a smaller board based on the MStar MSC313E Cortex-A7 SoC from BreadBee with a 64MB RAM appeared, enough to run embedded Linux.

Despite MStar MSC313E being a camera processor, the camera interface does not seem exposed in the board, so it looks to be designed to control I/Os over Ethernet. There’s no WiFi for now, but there may eventually be a future model that replaced the Ethernet jack with an Ampak WiFi module.

Source: https://www.cnx-software.com/2020/04/14/breadbee-tiny-embedded-linux-sbc-mstar-msc313e-camera-soc/

BreadBee specifications:

  • SoC – MStar MSC313E Arm Cortex-A7 processor @ ~1.0 GHz with NEON, FPU, 64MB DDR2
  • Storage – 16MB SPI NOR flash
  • Networking – 10/100M Ethernet (RJ45)
  • USB – 1x Micro USB 2.0 port
  • Expansion
    • 24-pin dual-row header (2.54mm pitch) with  SPI, I2C, 4x 10-bit ADC, 3x UART, GPIOs
    • 21-pin header (1.27mm pitch) with SD/SDIO, USB 2.0, GPIOs
  • Misc – RTC, Watchdog timer
  • Power Supply – 5V via micro USB port
  • Dimensions – 32 x 30mm

Source: https://www.cnx-software.com/2020/04/14/breadbee-tiny-embedded-linux-sbc-mstar-msc313e-camera-soc/

Raspberry Pi increase in IoT significance

More and more engineers and technology providers believe that it is suitable for industrial applications in the real world. Over the past few years, there has been a lot of discussion about the use of Raspberry Pi in industry, most of which emphasize that Raspberry Pi is a great tool for engineering experiments, but not so much for industrial applications in the real world. While it is true that the Raspberry Pi is not considered the best choice for mission-critical applications, it is also true that the Raspberry Pi is no longer a platform for experimentation.

Latest Raspberry Pi 4 development board, equipped with a 1.5GHz quad-core 64-bit ARM Cortex-A72 processor (approximately 3 times better performance than previous Cortex-A53 powering Raspberry Pi 3+ Model B and Compute Module 3 and 3+). can be chosen from 1GB / 2GB / 4GB LPDDR4 SDRAM options.

Raspberry Pi 4 continues the tradition of one of the most versatile and cheapest computer devices. It can be used for virtually anything from proprietary IoT solutions to a full-fledged desktop computer. The new Malinka has two micro-HDMI ports, a Gigabit Ethernet port, two USB 3.0 type A ports and two USB 2.0 type A ports.

Industrial use of Raspberry Pi 4

A year ago, TECHBASE released an updated version of the ModBerry M500 industrial IoT computer, replacing the aging Raspberry Pi 3 with a 3B+, giving it better performance. With the recent launch of the Raspberry Pi 4, TECHBASE has yet again, announced another upgrade to the M500, which now packs the latest single-board computer.

Raspberry Pi 4, with 2xHDMI, Gigabit Ethernet and 2xUSB3.0
Raspberry Pi 4, with 2xHDMI, Gigabit Ethernet and 2xUSB3.0

Over 10 million Raspberry Pi’s have been sold and the Raspberry Pi is likely to stay as a new standard in the industry. Official Raspbian OS is free operating system based on Linux Debian optimized for the Raspberry Pi comes with over 35,000 packages, pre-compiled software bundled in a nice format for easy installation. ModBerry devices are compatible with Raspberry Pi accessories, supported by Raspberry Pi Foundation. ModBerry M500 now with Raspberry Pi 3 Model B+ / Raspberry Pi 4 Model B support.

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Use of Wireless M-Bus for meter monitoring during pandemic

The wM-Bus or Wireless Meter Bus is a European standard (EN 13757-4) that defines communication between usability meters and data loggers, hubs or intelligent meter gates. The M-Bus wireless bus has been developed as a standard to meet the needs of the European network of media meters and remote reading systems and forms the basis of a new advanced measurement infrastructure (AMI). The frequency of M-Bus and sub-GHz wireless connections has been used for several years, but is still evolving to adapt to changing environments and take advantage of technological advances, including the emergence of the Internet of Things.

2.4 GHz band vs unlicensed bands

Intelligent network devices require robust long-range wireless communication. The most common frequencies are around 868 MHz, 434 MHz and 169 MHz, which are unlicensed bands in Europe and offer better radio wave propagation compared to 2.4 GHz. By using one of these unlicensed bands, radio waves can reach difficult areas such as underground meters or the location of buildings with many walls or obstacles. Another advantage of operating in the unlicensed band is that utilities have lower solution costs.

COVID-19 and wireless technologies

In times of COVID-19 pandemic hazards, the use of wireless technologies is often a must, to prevent further spread of the coronavirus. One of obvious choices for Internet of Things and home monitorng is Wireless M-Bus implementation.

TECHBASE has added high performance module for Wireless M-Bus connectivity and multi-hop networking into Moduino series expansion options. The module is configured as an embedded micro system or simple data modem for low power applications in the metering specifically allocated band of 169 MHz or in the ISM band of 868 MHz. The device is can be configured for interoperability in a WMBus network for Industrial IoT applications.

The RF implementation guarantees best-in-class performance in terms of covered area and power consumption. The output power can be increased up to +30 dBm on the 169 MHz band (+27 dBm on optimized version for highest power efficiency) and up to +15 dBm on the 868 MHz band. The extremely reduced power consumption gives access to long lasting battery life requirement (up to 2 μA in sleep mode for wireless M-Bus module with an RTC clock running).

The Moduino devices  can be provided with a W-MBus stack specifically developed by Embit for the platform that allows to integrate the module in the desired system without effort and simplify the interaction in WMBus networks.

MEET MODUINO X
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Amazon Alexa certifies Espressif’s ESP AFE for ESP32-S3 AI & DSP

Amazon’s website has introduced a Software Audio Front End (AFE) Development Kit section that lists software algorithms that optimize sound detection in noisy environments. The latest addition is the Amazon Alexa recently certified Espressif audio front end or ESP AFE algorithm for shorts.

The Espressif AFE algorithm was certified by Amazon after achieving excellent performance in long-range Alexa testing. In most cases, in low signal-to-noise scenarios, the wakeup rate reaches 100% and the speech recognition rate exceeds 90%.

Amazon-Qualified “Software Audio Front-End” Solution

Low resource consumption

Espressif’s AFE algorithms are optimized, as they take advantage of Espressif’s AI accelerator that is available in the ESP32-S3 SoC. Espressif’s AFE algorithms consume just 12-20% of CPU and around 460 KB of memory, including 220 KB of internal memory and 240 KB of external memory. This provides sufficient headroom for customer applications on the ESP32-S3 SoC.

Espressif’s AFE algorithms offer an easy and intuitive API for customer applications, so that their performance can change as dynamically as it is required. The distance between the two microphones can be between 20-80 mm, which allows considerable flexibility for the hardware design of developers’ end-products.

Source: https://www.espressif.com/en/solutions/audio-solutions/esp-afe

Industrial use of ESP32-based solutions

One of industrial IoT devices, supporting Espressif’s ESP32 technology is eModGATE from TECHBASE. Economical, ESP32-based solution can serve as an end-point in any installation or works well as a gateway, gathering data from scattered sensor mesh across the installation. For more information and also Raspberry Pi based solutions check Industrial IoT Shop with all the configuration options for eModGATE.

eModGATE with ESP32
Check eModGATE options
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