Esp32 i2s example jobs
I need help creating written examples in the format of an informative report. Ideal candidates should have experience in report writing and can create engaging, informative content. Please note, I will provide a perfect example and you will learn from it. Your task will be to: - Generate written examples in the format of an informative report - Ensure the examples are not similar to AI generated content Skills Required: - Excellent written communication - Report writing experience - Ability to create engaging content
...improving the overall thermal performance of the board. Key tasks include: - Adding new power management components to the existing design. - Adjusting USB traces to meet 90-ohm differential impedance requirements and enhancing noise/ESD protection. - Implementing strategies to reduce heat across the PCB. I'm looking for someone with a strong background in PCB design, particularly with Altium and ESP32, who can help optimize my design in a quick 1-2 hour session. Experience with implementing ground fills, hash patterns, and ground traces for noise/ESD protection and crosstalk minimization would be highly beneficial. Requirements: - Proficient in PCB design software - Experience with schematic modifications - Able to reroute traces and reposition components on PCB - Go...
...improving the overall thermal performance of the board. Key tasks include: - Adding new power management components to the existing design. - Adjusting USB traces to meet 90-ohm differential impedance requirements and enhancing noise/ESD protection. - Implementing strategies to reduce heat across the PCB. I'm looking for someone with a strong background in PCB design, particularly with Altium and ESP32, who can help optimize my design in a quick 1-2 hour session. Experience with implementing ground fills, hash patterns, and ground traces for noise/ESD protection and crosstalk minimization would be highly beneficial. Requirements: - Proficient in PCB design software - Experience with schematic modifications - Able to reroute traces and reposition components on PCB - Go...
...Adjusting USB traces to meet 90-ohm differential impedance requirements and enhancing noise/ESD protection. - Implementing strategies to reduce heat across the PCB. I'm looking for someone with a strong background in PCB design, particularly with Altium and ESP32, who can help optimize my design in a quick 1-2 hour session. Experience with implementing ground fills, hash patterns, and ground traces for noise/ESD protection and crosstalk minimization would be highly beneficial. [Removed by Admin] would appreciate it if you could share prior ESP32 design examples for reference. Thank you! Requirements: - Proficient in PCB design software - Experience with schematic modifications - Able to reroute traces and reposition components on PCB - Good communication skills in...
I am looking for a professional with experience in PCB design and ESP32 development, with a strong knowledge of ESP-IDF and Arduino. It is essential that you have experience in writing and modifying display drivers. The project needs to be completed within a very short time frame, so it must be prioritized. Within 2 days, the existing software must be installed after adding OTA functionality, and the Bluetooth connection must be tested in a loop. Despite the simplicity of the project, I have already worked with four programmers who failed to deliver tangible results, wasting valuable time. I cannot afford any more delays—every day of inactivity results in significant financial loss. Therefore, I ask that you only contact me if you are truly skilled and ready to bring the pro...
I require a skilled programmer to assist with an ESP32 project. The task is to program the ESP32 to receive a TTL binary scoreboard signal via serial UART and to serial read byte 8. The ESP32 will need to control LED lights using 8 digital pins as outputs, each corresponding to a bit in byte 8. Key Requirements: - ESP32 programming - Understanding of TTL binary scoreboard signal - Experience with UART serial communication - Ability to configure digital pins as outputs I have all the necessary signal protocol documentation from the manufacturer. There is no need for any specific software interface or application to control the ESP32, nor do I require any feedback or status indicators from the ESP32.
I'm looking for a skilled programmer to help me with an ESP32 project. I need the ESP32 programmed to receive a TTL binary scoreboard signal through the serial UART and output to more than 5 shift registers. I have all of the signal protocol documentation from the manufacturer. Ideal skills and experience for the job: - Proficiency in programming ESP32 - Experience working with UART and TTL signals - Knowledge of interfacing with shift registers - Capability to understand and implement manufacturer’s signal protocol documentation - No specific library or framework required, but flexibility and creativity in coding is appreciated.
Project Requirement: Miniaturized ESP32-S3 Development Board Design Objective: Design a compact custom ESP32-S3-based development board tailored for wearable and IoT applications with the following specifications. Key Specifications: 1. Processor: ESP32-S3 with Wi-Fi and Bluetooth capabilities. 2. Camera Support: Include a connector compatible with a camera module, e.g., OV2640, OV5640, or similar. 3. Audio Components: • Two SMD microphones for stereo audio input. • One SMD speaker for audio output. 4. Power and Connectivity: • USB-C port for data transfer, power, and battery charging. • Integrated battery charging circuit, supporting a single-cell LiPo battery. • Battery connector positioned on the backside of the board. 5. User I...
I'm looking for an engineer to assist in connecting an ESP32 device to a desktop, with the capability to display data in a visually appealing manner according to specific requirements. The firmware is available via Arduino, but it may require further iterations. ESP32 may change to custom MCU in the future Key Responsibilities: - Connect the ESP32 device to a desktop - Visualize data using various types of graphs - Optimize existing Arduino firmware as necessary Future Development: - Design a cross-platform desktop application to connect multiple sensors and visualize data on a dashboard - Potentially develop this into a mobile or web application Ideal Candidate: - Proficient in Arduino and ESP32 - Experience in desktop application development for Window...
...be appreciated. If you can use a more simple SD Card module that will plug into the new PCB even better! Looking for plug and play as much as possible. Thank you! The project involves: Creating a new PCB where an Arduino Nano ESP32 with headers plugs in and works with an SD Card Module to retrieve and play an audio file. Using the DY-SV5W audio module to play sound based on a signal read from an existing PCB. Including a switch to toggle between two speakers. Using JST 2.0 mm 2 pin connectors for all JST connections. Components and Connections Arduino Nano ESP32 - Main controller DY-SV5W Module - Plays audio files from an SD card (or choose something different that is readily available) JST PH 2.0mm 2-pin connectors - Three connectors for the following: JST #1 - ...
I will write firmware for Carrier Line Vehicle using ESP32. I will use Arduino ide for coding.
Project Requirement: Miniaturized ESP32-S3 Development Board Design Objective: Design a compact custom ESP32-S3-based development board tailored for wearable and IoT applications with the following specifications. Key Specifications: 1. Processor: ESP32-S3 with Wi-Fi and Bluetooth capabilities. 2. Camera Support: Include a connector compatible with a camera module, e.g., OV2640, OV5640, or similar. 3. Audio Components: • Two SMD microphones for stereo audio input. • One SMD speaker for audio output. 4. Power and Connectivity: • USB-C port for data transfer, power, and battery charging. • Integrated battery charging circuit, supporting a single-cell LiPo battery. • Battery connector positioned on the backside of the board. 5. User I...
...processes them in real-time, and sends the data to a mobile app that performs gesture recognition and translates the gestures into text or spoken words. Key Components and Overview Hardware: ESP32 Microcontroller: The ESP32 will collect data from sensors on the glove and transmit it to the mobile app via Bluetooth. Flex Sensors: Each finger on the glove will have a flex sensor to capture the degree of finger bending. Accelerometer (e.g., MPU6050): The accelerometer captures hand orientation and movement, which adds context to gestures. Power Supply: The glove will be battery-powered. Data Transmission: The ESP32 microcontroller will collect sensor data from flex sensors and the accelerometer. This data will be sent to a mobile app over Bluetooth, either as raw se...
Looking for someone that ALREADY has a 3 PHASE SPWM generator code for ESP32 for inverter system. This system should also have a built in feedback system to have a fixed output voltage. MUST HAVE CODE ALREADY AND WILLING TO SHARE IT AND DESIGN
I am looking for an experienced electronics designer to create a miniature ESP32-S3-based microphone module that can record audio, process it, and send voice messages over Wi-Fi to Telegram. The design should be optimized for low power consumption, compact size, and seamless Wi-Fi integration. This project includes both the hardware circuit design and basic firmware setup to enable audio recording and transmission functionality. Key Requirements: 1. Core Components: • ESP32-S3 Microcontroller: Use the ESP32-S3 for Wi-Fi capability and processing. • Microphone: Integrate a high-sensitivity MEMS or electret microphone capable of capturing clear audio, even whispers, with low power consumption. • Power Supply: Design for battery operation with efficie...
We need the attached 8 decal images put into a photo collage, like the one we had previously created (image attached) Simple Project.
I'm seeking a skilled front-end developer to enhance a single webpage (CSS + some HTML) for a light controller utilizing ESP32. The page needs to be visually pleasing and functional across both mobile devices and desktop browsers. The code should be simple and you should use no library ! Key Requirements: - Experience with responsive web design - Proficient in CSS and HTML - Understanding of user-interface design principles The code is available here (only this folder !!!): If you open locally the you will have 2 links that corresponds to 2 modes that differs slighly in the layout (based on css we hide some parts). Both mode should work and the current javascript code should also continue to work. Main things to
...components. Microcontroller Programming: Configuring ESP32 (or similar microcontroller) for Bluetooth and Wi-Fi capabilities to connect seamlessly with a mobile app. Alarm & Notification Systems: Enabling the device to send mobile notifications, flash lights, and trigger sound alerts when in alarm mode and motion is detected. Advanced Features & Modular Build: Creating a flexible design that allows for optional add-ons (such as sound alarms and radio) in future iterations. Energy Management & Charging Circuits: Efficiently managing power from Li-Po battery, solar panel, and wind turbine sources, with safe charging integration. Qualifications: Strong experience in electronics circuit design and microcontroller programming. Expertise with Arduino/ESP32 and Bluet...
I need some modifications made to my STM32 board. The source files are in EasyEDApro and the changes are as follows: 1. Two MOSFETs need to be reversed so that the board can handle either 24V or -24V on two wires with the H-bridge. 2. Change the USB-C...made to my STM32 board. The source files are in EasyEDApro and the changes are as follows: 1. Two MOSFETs need to be reversed so that the board can handle either 24V or -24V on two wires with the H-bridge. 2. Change the USB-C connection to a USB-B for easier manufacturing. 3. Remove JTAG but keep SWD. 4. The board size needs to be slightly smaller to reduce production costs. 5. Add a removable ESP32 S3 mount using a socket connector. Ideal skills for this project include experience with EasyEDApro, knowledge of STM32 boards, and P...
...added to the existing schematic and some minor fixes applied to the layout. This should be a straightforward and quick task, and I’d love to go over the specifics with you via Zoom to ensure everything is clear. Let me know your availability, and I’m happy to work around it. This should take 2 hours max to do this job. Also, if you're available, I want to see any past designs you have done with ESP32. Requirements: - Proficient in PCB design software - Experience with schematic modifications - Able to reroute traces and reposition components on PCB - Good communication skills in English for Zoom discussions Ideal Skills: - PCB Design - Schematic Modification - Trace Rerouting - Component Repositioning - Zoom Consultation...
Build a circuit with ESP32 and Ethernet module together
The project is to port a I2S mechanism implemented using PIO on Raspberry PICO to Raspberry 5 that also has this PIO peripherals. The Pico github project is here There is also: - a discussion around I2S and PIO with reference to the Pico project from the link above - a valuable resource on PIO on the target RPi5 although it does not cove specifically the I2S but may help and speed up the porting with some supplement here The project should allow to handle this I2S PIO mechanism using possibly built-in ALSA buffering functionality. A simple concept like using the DMA that is also part of the
...detection. - Apply masking to eliminate everything outside the bounding box for privacy. - Facial Expression Analysis Model: Detect and interpret the facial expressions of the target to assess emotional or physical states (e.g., discomfort, happiness). This model should work in various lighting conditions and be optimized for use on an embedded device. Deployment: Both models will be deployed on an ESP32-CAM, so they must be optimized for embedded devices. Deliverables should include a sketch file, TFLite files for each model, and complete embedded logic code. Data Requirements: Currently, there is no labeled training data available, so the project may involve data collection and annotation to ensure high accuracy for both models. Expected Accuracy: Both models should achieve ...
I'm looking for an experienced programmer and engineer specializing in ESP32, with in-depth knowledge of ESP-IDF and Arduino. It's essential that you can write a display driver and modify an existing one if necessary. Despite the simplicity of the project, I've already gone through four programmers who only wasted time without achieving concrete results. I can't afford to lose more time and resources; every day of delay represents a significant financial loss. For this reason, only contact me if you are truly skilled and available to see the project through to full functionality. I'm seeking someone who understands the project immediately, not someone who still doesn't get it after it's been explained ten times, as has already happened four times...
video editing from giving video data (5minutes) with for example nice zoom effect with some text overlays... video output: colorful and dynamic clip for spa
...Pico SDK to develop a program for the Raspberry Pi Pico 2. The program should be able to receive an I2S signal and transmit it as S/PDIF (LVDS). The program should utilize the PIOs effectively and be capable of handling up to a maximum of 24-bit @ 192kHz. Key Requirements: - Develop a program for the Raspberry Pi Pico 2 that converts I2S to S/PDIF - Use of the PIOs is essential - The program should support a maximum of 24-bit @ 192kHz - No audio processing or modulation is needed before transmission - The program should handle I2S audio format specifically Ideal Skills: - Extensive experience with Raspberry Pi Pico SDK - Strong programming skills, preferably in C/C++ - Knowledge of I2S and S/PDIF transmission - Familiarity with audio programmin...
I'm looking for an expert with experience in working with ESP32 and Postman scripts. The main objective of this project is to collect user input data via physical buttons/switches. Key Responsibilities: - Develop a system using ESP32 that collects data from physical buttons/switches. - Create Postman scripts for testing and data transmission. - Ensure the system is user-friendly and efficient for data collection. Ideal Skills and Experience: - Proven experience with ESP32 hardware. - Proficient in creating and using Postman scripts. - Experience in designing systems for data collection. - Excellent problem-solving skills and attention to detail.
...added to the existing schematic and some minor fixes applied to the layout. This should be a straightforward and quick task, and I’d love to go over the specifics with you via Zoom to ensure everything is clear. Let me know your availability, and I’m happy to work around it. This should take 2 hours max to do this job. Also, if you're available, I want to see any past designs you have done with ESP32. Requirements: - Proficient in PCB design software - Experience with schematic modifications - Able to reroute traces and reposition components on PCB - Good communication skills in English for Zoom discussions Ideal Skills: - PCB Design - Schematic Modification - Trace Rerouting - Component Repositioning - Zoom Consultation...
ESP32-based Plant Watering and Monitoring System with OTA, MQTT, Custom PCB, and AC Power Support Project Overview: This project focuses on creating a robust, smart plant watering and monitoring system using a custom-designed PCB and powered by an ESP32 microcontroller. Designed for convenience, the system will plug directly into an AC power socket, making it suitable for continuous indoor or outdoor use. Additional functionalities include automated plant watering, real-time monitoring of TDS, pH, and temperature, OTA updates, and MQTT-based remote monitoring and control. Objectives: 1. Automate Plant Watering: Control watering intervals with remote manual override. 2. Monitor Environmental Parameters: Continuously monitor Water TDS, pH, and temperature. 3. Remote Communic...
...coffees made by any machine and send this data to a database. With your help, we can track consumption trends, remotely bill customers, and even alert them when stock is low. And that's not all — we’re thinking beyond: imagine controlling coin acceptors (like NRI models) and allowing people to top up a machine wallet via an app to enjoy their coffee. What’s the coolest idea we’ve cooked up? Using an ESP32-like sensor to analyze machine vibrations and detect patterns using AI. The goal is to identify machine cycles and accurately count them. Configure internet connectivity, define acceptable cycle patterns, and voilà! Our magic counter springs into action. We’re looking for a tech wizard who can: Design the electronics for these intelli...
I'm seeking an experienced firmware developer with a... It should be a very quick job for someone knowledgeable with Arduino and JSON and HTTPS POST. You must already have an ESP32 development kit so you can test the firmware is working and we will validate on our side with ESP32C3 development kit. The database is already online and everything works when using POSTMAN. We will also give you our work-in-progress firmware. It's likely just a few line of codes to modify to make it work. More details will be given to selected candidates. This is only the first step of a larger firmware development project and if you are successful it will likely lead to a larger contract to develop the full firmware. PLEASE WRITE "ESP32" AT THE TOP OF YOUR PROPOSAL TO ...
Add deep sleep support for already developed ESP32 firmware. Read and transmit battery voltage levels to thingsboard
I'm looking for a professional to design a multi-port trigger device for me. The device should have: - 8 x USB ports, each supporting HID and connected via a relay. Each port's output should not exceed 5v. - Usage of a compact micro-controller, ideally Arduino or ESP32, with Wi-Fi capabilities. - A disconnectable momentary button/trigger device. - Three operational modes, details of which will be provided later. - LED indicator lights for each USB port to show connectivity status. - Ability to customize the timing of the momentary button/trigger device for various applications. The ideal candidate for this project should have extensive experience in working with micro-controllers and USB port interfacing. Knowledge in relay types is crucial as I am open to vario...
I’m seeking an experienced IoT developer who can assist in programming an ESP32-S3 to communicate with a cloud server. The device should be able to send structured sensor data to a RESTful API endpoint using secure and precise HMAC-based authentication. Below are the main requirements for the project: Key Project Requirements Device Setup and Communication: Platform: ESP32-S3 (programming with Arduino IDE or PlatformIO preferred) NTP Synchronization: Accurate time synchronization with an NTP server to ensure correct timestamping API Integration and Secure Communication: API Method: POST requests with JSON payload to send sensor data HMAC-SHA256 Authentication: Generate signing keys based on deviceSigningKey and current date Create a canonical request and compute fina...
...looking for an experienced C programmer with expertise in ESP32-S3 Arduino. The main task is to facilitate wireless communication via Wi-Fi and the collection of user inputted data to be stored on the ESP32 Using the three included demo examples as a reference, the project should allow the ESP32 to enter access point mode and allow connection to a phone or laptop via wifi. The ESP32 should connect to the phone or laptop without the need for an existing wireless network: the ESP32 shall create the wireless network. The user shall then be able to access the ESP32 via a web browser and a static IP address and load an HTML form with three user input fields. The user can input values into the html form and submit the form to the ESP32...
I need a professional who can design an ESP32 circuit board for an IoT device. The board must include several specific components and be powered by an external power adapter. Key Requirements: - Design an ESP32 circuit board tailored for IoT applications - Incorporate a RTC with a rechargeable battery w/reverse polarity protection - Include a Micro SD slot for data logging - Integrate a 10A Relay with an option for a 20A relay - Utilize an ESP-WROOM-32 Module controller - USB port for programming and initial powering - all necessary components like voltage regulation 5V-3.3V as needed - Implement a DC-DC converter that can handle 10-15VDC input and convert it to 5V for powering the entire board from an automotive source Ideal Skills and Experience: - Extensive know...
I'm seeking an experienced expert in designing and developing bespoke IoT projects using ESP32 or ESP8266. The project will encompass sensor integration, real-time data monitoring, and the creation of intuitive interfaces for easy control. Key aspects of the project include: - Optimized power management: The solution should be energy-efficient. - Reliable connectivity: Use of various protocols (MQTT, HTTP, etc.) to ensure a stable connection. Although I haven't specified the type of user-friendly interface, sensors, or communication protocol, I am open to your suggestions based on your expertise and previous experiences. Ideally, you should possess: - Extensive knowledge in IoT and ESP32/ESP8266. - Proficiency in designing intuitive user interfaces. - Experience ...
I need a skilled PCB designer to create a custom board for controlling a DHT22 temperature sensor with an ESP32. The ESP32 should connect to a mobile app via Wi-Fi. Key Requirements: - PCB design experience - Familiarity with ESP32 and DHT22 - Understanding of Wi-Fi communication protocols
...hardware design and embedded systems to create a custom ESP32 board tailored for home automation. The requirements include: - A 24VDC power supply - 8 isolated 24VDC inputs - 8 relay outputs - Wi-Fi compatibility adhering to the 802.11b/g/n standards - Support for a SIM card The primary application of these boards will be for home automation. Therefore, a solid understanding of home automation systems and requirements will be beneficial. Please note that I have not specified any particular sensors or peripherals to be supported at this stage. However, flexibility and the ability to accommodate future upgrades or expansions will be a key consideration. Ideal candidates for this project should have demonstrable experience with ESP32 and have a portfolio of similar proje...
I'm seeking support in planning and constructing a mixed-signal circuit for control of automotive additional lights/warning lights. . The primary function of the digital segment of this circuit will be to manage control systems. Key Components: - Microcontrollers - 10 mosfet controlled output's (In sted of relay) - 2,8" Touch Display - Voltage Regulator ...using Arduino IDE. The circuit should be robust enough to operate in typical automotive environmental conditions like temperature variations and vibrations. I will do all of the work I can on my own. I would like to design and try to code and build this myself, I need a supervisor who can help me with any problems, help and make choices and not least explain to me how things work. I want to use ESP32 Dev board an...
I'm looking for a programmer who can develop a program that allows for the transfer of a JPEG file from a computer to an Arduino ESP32, then to another Arduino ESP32, and finally back to a computer. The method for this transfer should be via serial communication. Key Requirements: - The program should be efficient and reliable. - A deep understanding of how to work with Arduino ESP32 is crucial. - Familiarity with JPEG file handling and serial communication is a must. Please note, there are no encryption or security features required for this project.
I'm looking for an expert PCB designer who can design a comprehensive All-In-One (AIO) sensor PCB powered by ESP32S3 with ESPHome. The PCB should accommodate multiple sensors including: - Temperature and humidity sensor - Motion sensors (PIR and mmWave) - Air quality sensor - CO2 sensor - Microphone - Speaker - Light/Illumination sensor - VOC sensor Th...understanding of how to integrate these various sensors onto a single board. Familiarity with ESP32S3 and ESPHome is crucial. Your role will be to create a design that is not only functional but also efficient and cost-effective. Please provide previous examples of similar projects you have completed. This project is highly inspired by AIOsense (), but with support for a ESP32 device with additional pins.
I'm looking for an ex...with specific functionalities for a simple ESP32-based board. The board consists of a ESP32-PICO-MINI-02 module, SD card connector, and a NAU88C22 audio DAC. I need a library with simple to use functions and the following functionality included: - Play MP3 file with given name from the SD card (non-blocking). Other high-compression formats are also acceptable. There is NO need to support more than one format. - Stop / Pause - Set sound volume - Link to Bluetooth headphones and broadcast sound I will supply board schematic and an actual board o the selected provider to ease the development. Deliverables must include the library and one or more sample programs to demonstrate its functionality. The library must compile and work with the latest ...
I'm conducting research and need a real example of a bound eSIM profile package from a US mobile operator. This could be from AT&T, Verizon, or T-Mobile. The package should be one that has been downloaded onto an Android smartphone, not a test package. Ideal Skills and Experience: - Access to an eSIM capable Android smartphone - Ability to download and identify the correct eSIM package - Understanding of eSIM technology and Android systems The package does not need to be activated and will be encrypted. So, I would not be able to read the encrypted contents (like IMSI and key K), but I will be able to read the metadata. Understanding the metadata for an operator eSIM profile is what I am interested in seeing. You can download these eSIM profiles over the Internet and...
I'm looking to build an RFID writer using an ESP32. This device should allow me to manually write both text and numbers to all blocks and sectors of a Mifare 1k card, with the data being saved in hexadecimal format. Key Requirements: - Manual input: The writing process should be triggered by manual input. - Mobile app: A mobile app will be the user interface for this manual input. And keypad and display should be connected. Ideal Skills and Experience: - Proficiency in working with ESP32 and RFID technology. - Experience in developing mobile applications. - Knowledge of data encoding, specifically hexadecimal. - Skills in creating user-friendly interfaces for manual interaction.
We are looking for an NFC specialist who has solid experience in the design and development of NFC circuits with PN5180, the adaptation and testing of antennas and the handling of RF multiplexers. Experience with ESP32 would also be ideal A circuit is to be designed that can read up to 8 antennas with the help of multiplexers. Further details by chat ! Please only binding offers and no automated ones.
I'm looking for a skilled programmer to help develop an ESP32-based IoT device. The device needs to have Wi-Fi connectivity and be capable of integrating with various sensors. The specific sensors will include temperature sensors, motion sensors, and light sensors, among others. WE are looking for someone to convert arudino based code to direct IDF code and work with our team to take over once converting is done. Our code is working but we want to improve it. Ideal Skills: - Proficient in programming ESP32 - Extensive experience in IoT device development - Strong understanding of sensor integration - Knowledge of Wi-Fi connectivity implementation
I'm looking for an expert programmer to link my LVGL interface (written in C++) to an ESP32, a 7 inch touch screen, a set of relays, and a sound sensor. Key Requirements: - The interface features 17 buttons that control the relays in various modes. - The sound sensor's role is to trigger the relays for turning on/off and, in some instances, to make the relays turn on/off at different intervals based on which button is pressed. Additional Information: - I have a partially coded ESP32 setup. - The relays are primarily used for triggering solenoids. Ideal Skills and Experience: - Proficiency in C++ and experience with LVGL is crucial. - Prior work with ESP32 and touch screen integration is highly desirable. - Knowledge of relay systems and sound sensors w...
