Esp32 bluetooth tutorial jobs

I'm eagerly seeking an online tutor with prolific expertise in the NDIVA Omniverse ACE, to guide me, a complete beginner. This task involves: - Developing an easy-to-follow tutorial that is comprehendible for someone without prior knowledge. The tutor should adapt their teaching methods to suit my level of understanding. - The focus will be on NDIVA Omniverse ACE. The course should be structured in an organized manner, with clear explanations to facilitate practical understanding. The perfect candidate should: - Have substantial knowledge and experience in working with NDIVA Omniverse ACE. - Proven experience in online tutoring. - A great communicator, proficient at explaining even the most intricate ideas with simplicity and clarity. - Patient, adaptive and innovative in...

I'm in need of a professional who can create video tutorials for me. I find it challenging to understand things when provided in a technical way. I am seeking someone who can provide me with clear, step-by-step instructions. Ideal Skills and Experience: - Ability to simplify complex information - Proficiency in creating video tutorials - Great communication skills - Patience and understanding The scope of the tutorials is open-ended. It may involve explaining software usage, programming concepts, or even product assembly. If you're adept at breaking down complicated instructions into simple, easy-to-digest steps, then I'd love to hear from you.

We are looking for an ESP32 coder that can work on a "per project" basis. For the first project, the hardware has already been designed and assembled. Your main responsibilities will be to write code to ensure that the ESP32 adequately read the data from the INA226 Current & Voltage Sensor and then transmit the measurement data via LoRa. Key Requirements: - Proficiency in ESP32 programming - Previous work with sensor and sensor module integration - Familiarity with LoRa integration, or willing to learn

I'm in need of an experienced electronic embedded system developer to create a cutting-edge blood pressure monitor medical device. The project involves schematic, pcb, firmware development, as well as algorithm creation, testing and monitoring. Additionally, the device should be able to interact with an Android app for display and control purposes. Key features: - Bluetooth connectivity: The device should be able to connect to other devices wirelessly. - Real-time monitoring: The device should provide continuous data so that users can monitor their blood pressure in real-time. The Android app should include: control device and viewing data with scheduling. Regulatory Standards: - CE (Conformité Européenne): The device must adhere to European standards for healt...

...FEATURES: - User registration and login: There needs to be a straightforward area for potential users to register and account and log in. - Course listing and search: The major purpose of the site revolves around an engaging, user-friendly course listing and search functionality. - Video lectures and tutorials: Video content is king these days, and my site definitely needs the ability to host and play tutorial videos. DESIGN REQUIREMENTS: I don't have a specific design in mind and need your professional input and creativity on this matter. Please help me come up with a design that is not only eye-catching but also user-friendly. IDEAL SKILLS: - Proven website development experience - Familiarity with educational websites or e-Learning platforms - Strong UX/UI skills - Des...

I am looking for a proficient C++ developer with extensive knowledge of embedded c or c++. I need someone who can simplify the openDTU projekt so that I will have only the inverter control functionality without all the other protocols. I want to be able to control the inverter with the ESP32 directly. over the nrf24l01+ module. The Projekt is found at: The OpenDTU is a DTU which enables control of multiple different solar inverters. The Projekt uses a web app to add/delete inverters and show or control the values which the solar panels are producing. I want to use the inverter control functionality inside of my own project so that I need library where I have the same features than in the web app but controled in my own code. So the task is to simplify

I need a freelancer to assist me in connecting my MIT App Inventor to my HiveMQ broker. The main goal of this project is for me to gain knowledge and understanding about IoT connectivity. I have the arduino code working succssfuly when I enter the topic and the message manullay in HiveMQ broker. Now I like ...and understanding about IoT connectivity. I have the arduino code working succssfuly when I enter the topic and the message manullay in HiveMQ broker. Now I like to use MIT App inventor to connect to broker and passes the topic & messages Key requirements: - Connection of MIT App Inventor to HiveMQ broker - Ability to switch ESP32 LED on/off Ideal Skills: - Proficiency in IoT connectivity - Experience with MIT App Inventor and HiveMQ - Strong understanding of ESP32...

I'm looking for a skilled C++ software developer to create a software on a esp32 which talks to a nrf24 module. The Software parts can be taken from the Github directory: I need only the functionality which can be seen on the pictures in the code. All the web and network stuff can be ignored.

I need assistance in simplifying the library management of a Platformio project. I need the openDTU Project to be simplified so that all the network and mqtt stuff is removed. I want just the inverter control functionality in that library so that im able to control it with the ESP32 without internet connection.

I need someone who can simplify a c++ project for me. The project is the openDTU repository on GitHub () . I want just the inverter control functionality without all the web and cloud connection stuff. I want a library where I can add a device and control it on a ESP32 directly without connecting it to the internet.

I am looking to develop a specialized program for the PN5180 reader with a focus on reading ID card data. This is a personal project aiming at making ID card management more efficient. The program just need joint wi...focus on reading ID card data. This is a personal project aiming at making ID card management more efficient. The program just need joint with our team and help to code for read data from reade with scan time below 3 second. Reading the mifare ISO 14443 card, using mrz information and APDU command for selecting, reading data Ideal skills and experiences include: - Proficiency in programming the Esp32 platform - Experience with PN5180 reader - A good understanding of ID card reading procedures and requirements. Please ensure to provide relevant examples of your past...

I'm looking to build an electronic device tha...should have a large, easy-to-read display to make the readings straightforward and accessible. - Bluetooth Connectivity: I'd like the device to connect to smartphones and other devices, allowing for data tracking and easy sharing with healthcare providers or family members. Ideal Skills: - Experience in health monitoring device development, especially blood pressure monitors. - Proficiency in electronic device design and production. - Knowledge of Bluetooth connectivity and app integration. - Able to create a user-friendly interface and large display. If you're confident in creating innovative health monitoring devices, especially with a focus on blood pressure, and you're skilled in Bluetooth connec...

...professionals aged 20-45 (females) to my site. The primary focus of this project is to increase my website traffic through Instagram. Your role will be to create compelling posts that will resonate with professionals aged 20-45, piquing their interest and motivating them to visit my website. Key responsibilities would include: - Crafting and scheduling posts that would include product photos and tutorial videos - Engaging with our audience on Instagram - Using Instagram features like stories, reels, and IGTV effectively - Providing regular reports on the performance of the posts I am looking for a professional who has: - A proven track record of successful Instagram marketing campaigns - Thorough understanding of Instagram's algorithms and features - Experience in crea...

I'm looking for an experienced tutorial creator to help me with making a video tutorial. Specifically, I need a step-by-step guide that's aimed at beginners with no prior knowledge. Key Requirements: - Video Tutorial: This tutorial will be in video format. - Guiding Through a Process: The main goal of this video is to guide viewers through a particular process or task. - Beginner-Friendly: It is essential for the content to be easily understandable for people with no prior knowledge on the topic. Ideal Skillset: - Proficient in creating video tutorials - Experience in guiding through a process or task - Understanding of how to apply beginner-friendly teaching methods Feel free to share any relevant experience you have in this area. Thank you.

I'm in need of a PCB design for prototyping purposes. The board's complexity is a double-layer one, and its dimensions are very small, up to 2 inches. The PCB design must be suitable for prototyping, so it should be well-structured, compact and efficient. Key details: - MCU: ESP32 - Interface: Wifi/Bluetooth - Number of sensors to be interfaced: 4 - Type: Prototyping - Complexity: Double-layer - Size: 40mm dia Ideal skills for this project: - PCB design experience, specifically in prototyping - Proficiency in designing double-layer boards - Ability to create compact and efficient designs - Familiarity with small form factor PCBs.

I am in need of a developer well-versed in web development to guide me through deploying my GitHub project on Netlify. The project can be found here: These tech were used to make the software ⚛️ React JS - Frontend ? Apollo GraphQL Server v3 - Server API ? GraphQL Template By Mohit - Boilerplate for Apollo ? Prisma - ORM ? Any relational or non-relational database that Prisma supports ?️ Redux w/ Redux Toolkit - State management ? IP Registry - Free Geolocation lookups

Hello, One of our clients has a requirement for on-site video maker and editor. They have got all the equipment (a very high-res Canon Camera and other accessories) and want to start a Kid's YouTube Channel and looking for someone to make and edit videos. Ideally, they need someone to be located in Islamabad/Rawalpindi area in Pakistan for ease of collaboration and working. So if you are not available in that area, bother not to apply. If you are, we will connect you with the client.

I'm looking for a skilled video producer and editor to create tutorial videos which are mainly 1-3 minutes in duration but could occasionally stretch to 5 minutes. This role involves: - Producing high-quality, clear screen recordings - Editing videos for clarity and seamless viewing - Integrating a working microphone for sound capture These video's will not be hard to make (I have some example videos in the end of the description). Just basic editing, basic recording. You have to use your own voice, webcam if possible, but not needed. This is how it will work: 1. Topic I will provide you with a video topic / title. This topic will be a 'How To' topic. For example, I will give you this title: How to change background in windows. 2. Research You will do res...

I'm looking to upgrade my current ESP8266 controller to an ESP32 C3 Mini controller. I am primarily interested in freelancers with specific experience in this upgrade. Here's what I need: Requirement -1 : 1. Update existing Master Controller board based of ESP8266 to support ESP32 C3 IPEX/ (EasyEDA PCB design) 2. Retain GPIO connections and other circuits and components. 3. Ensure the position of LEDs, buttons and interfaces are as in current design 4. Ensure that the device supports handling loads upto 3A total without any heat with each port support upto 1 A Requirement -2 : 1. Redesign existing Zone Expander PCB board from Eagle to EasyEDA 2. Add LED Power indicator option 3. Ensure that the Expander handle upto 3A without any heating and each port handles u...

As a passionate educator, I am seeking an innovative and skilled video creator able to generate a series of explainer, product demo, and tutorial videos for my students. This project involves the use of mixed media, combining both live action and animation to create an immersive, enlightening experience. Key Responsibilities: - Create engaging explainer videos that detail complex concepts and processes - Develop product demo videos highlighting the uses and applications of various items - Generate tutorial videos explaining step-by-step procedures or instructions Ideal Skills and Experience: - Strong capability in creating mixed media content: combining live action footage with animated graphics - Experience in creating content tailored for students and geared towards ed...

I have an iOS XCode project that requires the integration of a Gantt chart client with BLE devices. The implemented solution should be engineered to: - Read and write data from/to BLE devices - Read the device status specifically - Engage simple communication with BLE devices Ideal candidates will have profound experience with Bluetooth Low Energy (BLE) devices, XCode, and incorporation of Gantt chart clients. A keen understanding of device statuses and ability to implement simple but effective BLE device communication are essential for this task.

I need a freelancing expert who can develop a touchscreen console with ESP32-S3 LVGL (embedded graphics) capabilities or other library. The console should operate on FreeRTOS and and be primarily designed for custom data visualization with a focus on remote control and message typing activity. Ideal Skills & Experience: - Proven experience with FreeRTOS - ESP32-S3 LVGL implementation proficiency - Remote-control and texting functionality design expertise Expectations: - Efficient usability for data visualization - Stable remote control and typing features - Prompt and responsive communication.

...to integrate and transmit data using Bluetooth after power On. The sensors for which I need to integrate include Temperature, Humidity, PIR motion, Pressure, and an RTD (Resistance Temperature Detector). To elaborate: - Sensor Integration: You need to possess in-depth knowledge about different types of sensors, mainly Temperature, Humidity, PIR motion, Pressure, and RTD (Resistance Temperature Detector). Leveraging this knowledge, you shall efficiently integrate these sensors with the ESP or NODE MCU. - Relay Control: Based on the Bluetooth ADV data received from another ESP, your task includes performing actions such as Turning on and Turning off the relay. - Data Transmission: After the power is on, the task is to transmit Sensor data using Bluetooth. The id...

I'm looking to enhance my current car stereo system with a limited budget of $100 - $500. Existing system will need to be replaced and the new one should offer the following features: - Bluetooth connectivity - GPS Navigation - Sirius XM Freelancers with proven experience in car audio system installations who can provide affordable solutions will be prioritized. Please highlight any similar projects completed. Ability to source and purchase the new system in addition to installation is a bonus. A timely and seamless installation is ideal, minimizing downtime of the vehicle. Thank you.

I need a BLE Bluetooth communication sample to send and receive data in Ionic with Vue.js for both Android and iOS. I'm looking for a developer who has experience with Bluetooth Low Energy (BLE) communication and Ionic framework. The prototype should allow for data transfer between devices. Key requirements: - BLE Communication: The app should be able to establish a BLE connection and send/receive data. - Cross-platform: The solution should work seamlessly on both Android and iOS devices. - Ionic & Vue.js: Proficiency in Ionic and Vue.js is necessary to implement this feature effectively. - Experience: A portfolio of similar projects would be a plus. In essence, the primary focus of this feature is to enable data transfer between devices, leveraging BLE technolog...

I need a professional to compile and configure the app with Android Studio and give me the apk ready to publish it on Google Play. I deliver the source code of the application with the latest Flutter SDK update and work with WordPress backend. It will also have a structure tutorial and configuration manual. It is not complicated or time consuming for a professional with basic knowledge of Android, Java, Fultter The application is working with the backend via the REST API. The backend returns JSON data and displays it on the app. The package is full source code and complete solution. It includes the source code for mobile and backend. Later we can hire another job for iOS. Thans for your attention

...particularly in the development and manufacturing of high-end luxury furniture *Deep understanding of all aspects of furniture design concepts, engineering, production techniques and quality standards *Someone that is skilled and experienced in the development and production of mechanized furniture that utilize electrical and mechanical components such as; electric recline mechanism, LED lighting, bluetooth stereo, and various other functionalities *Strong business acumen with a track record of successfully launching and scaling businesses *Excellent communication and collaboration skills to work effectively  Benefits: By engaging your services, we anticipate the following benefits: * Access to your valuable industry knowledge and expertise * Streamlined operations and incr...

...with the project. Key project requirements: - The drone will be based on ESP32 and will utilize brushed motors. - It should be designed for both indoor and outdoor environments. - The primary control mechanism will be through a smartphone. - The main functionality of the drone will be for photography and videography purposes. Your role will be to: - Develop the necessary firmware to control the ESP32 based drone. - Implement the smartphone control interface. - Ensure that the drone is designed to be stable and suitable for both indoor and outdoor flights. - Implement the necessary software to enable it to capture high-quality photos and videos. Ideal skills and experience for the job include: - Proficiency in ESP32 and brushed motor drone development. - Prior ex...

I'm looking for a skilled professional who can create an engaging video tutorial in Moroccan Arabic. I have developed a new web-based app and need a tutorial to guide users on how to navigate and utilize its features effectively. Key Requirements: - Proficient in Moroccan Arabic: The tutorial needs to be in Moroccan Arabic, so fluency in the language is crucial. - Video Production Skills: You should have experience creating high-quality video tutorials that are engaging and easy to follow. - Web App Understanding: A solid understanding of web-based applications is necessary to effectively demonstrate the app. The goal of this project is to help new users understand how to fully utilize the app, so that they can benefit from its features. A successful candidate ...

I'm seeking an experienced PHP developer, with skills in JavaScript and MySQL. I have a Production System that requires an immediate update to have additional product types listed for sale in it's custom PHP Cart System that uses a dynamic pricing table and Calendar module. I have tutorial videos on its functionality to help guide you. However, the two new product types are new to the system and will need to be created. Key Requirements: - Expertise in PHP, MySQL, JavaScript - Constructive problem-solving skills - Ability to adapt to unknown project scopes. Your role may involve building complex applications or simple website scripts. With the uncertain nature of the tasks, a flexible and proactive approach is ideal. It'll be a bonus if you've worked on divers...

Please refer to "Saving c...refer to "Saving changes" item in: Write javaScript code to send data to a specific URL (to be defined). Handle three different situations: adding, editing, and deleting events on the Bryntum calendar (). - Each time an event is added, edited, or deleted, relevant event details are sent to the designated URL. - This may include the event id (when then event is being edited or deleted), and others which will be dealt with later on this project or on a next project. Ideal Skills: - Experience with JavaScript - Check Bryntum Calendar live demo at This is a very simple project! Looking forward to your proposals.

...this circuit is to measure pressure using a flat piezo element, read the analog data, and then transmit it via Bluetooth to an Android smartphone. Key Points: - The circuit needs to handle a range of 0-100 PSI. It should accurately measure the pressure and convert it into a readable format for the smartphone. - The circuit should be compact and user-friendly, allowing easy pairing and operation with an Android smartphone. Ideal Candidate: - Strong background in electronic engineering, particularly in designing circuits for sensor data processing. - Prior experience in working with piezo elements and pressure transducers will be a significant advantage. - Proficiency in Bluetooth technology and its integration with electronic circuits. - Knowledge of Android app develo...

The system must function as a slave module and be connected via RS485 in mdonbus to a master PLC the conductivity values read must be transferred to a PLC via Modbus which will memorize them. The system must have an ESP32 module, an RS485 converter, a display for local visualization of the electrical conductivity and the probe. The conductivity value to be measured ranges from 0 to 20 mS

Hi I will generate the 120 degree phase apart SPWM source on ESP32

I'm looking for a dedicated professional to undertake basic editing tasks for a series of educational tutorial videos. You will be provided with raw footage that needs trimming and merging to create a seamless learning experience for viewers. Your tasks will include: - Trimming unnecessary parts - Merging clips to ensure logical sequence - Ensuring smooth transitions between frames - Delivering finalized products in a timely manner Ideal candidates should have: - Proven experience in video editing, particularly with educational material - Proficient in using various video editing software - Excellent attention to detail - Ability to meet deadlines successfully Please provide your previous work samples along with your bid. Looking forward to collaborating with a talented i...

...developer skilled in working with ESP32 and PN5180. Your primary task for this project will be the implementation of a card reading function for the ISO 14443 Type A card, and successful communication of the device with a server. The key requirements are: - Skillful handling of the ESP32's communication functionality. You will need to ensure that the ESP32 can transmit the user data obtained from the card to a server. - Ability to extract 'User Data' from the ISO 14443 Type A card using PN5180. The target is: Can select to Card and reading the DG2, 13, 14, 15, SOD data of Card - Strong understanding and practical experience with Identification systems. The ideal candidate has a strong background in embedded systems and demonstrated expertise in ...

We are seeking an experienced IoT, IOS/Andriod App/Cloud database system developers, to action the following project Your main task will involve: 1. Connect to a Expressif ESP32-Wroom device via BLE (Bluetooth) to turn attached device on/off. 2. Have a developed IOS/Android Application to communicate to the BLE to send On or OFF Command 3. The Mobile Application will be required to connect to a Cloud based Database to validate permissions for users account before the mobile device can send the request to the module to turn on/off function. 4. Integration to existing software systems to send update to database for account permissions to be assigned. This can be done via API to 2 platforms. Your main task will involve: - Developing and implementing an Arduino-based automa...

I'm in need of a detailed, comprehensive video tutorial on email phishing techniques. The primary aim of this tutorial is to serve as a research resource in the field of email phishing. The ideal candidate for this project should be well-versed in the following areas: - Email phishing: The freelancer should have a comprehensive understanding of various email phishing techniques that are prevalent in the cyber world. - Video tutorial creation: The tutorial should be engaging and easy to follow for users who may not be experts in the field. - Cybersecurity: A general understanding of cybersecurity principles would be beneficial to ensure accurate portrayal of email phishing threats and preventive measures. The video should encompass all aspects of email ph...

Draw air duct for intake and exhaust to a ks3m crypto machine. These will be 3D printed and must be drawn in fusion 360. The file should be sent to me and also a tutorial video in English how to draw this step by step. I have model of the mashine in stp file and picture.

Draw air duct for intake and exhaust to a ks3m crypto machine. These will be 3D printed and must be drawn in fusion 360. The file should be sent to me and also a tutorial video in English how to draw this step by step.

For this project, we're looking to explore the capabilities of ESP32 - Arduino. In particular, we need help from developers who can demonstrate their understanding of this platform through a demo project. Looking for a simple ESP32/Wifi project for color mixing with LED lightbulb. This is a simple demo project to show WiFi connectivity using the ESP32 microporcessor Using ESP32, 64x128 oLed, one button and 3 LEDs, 10K potentiometer, 1602 LCD (non I2C) Dial in R color using potentiometer 0-255 – Press button, show brightness on RED LED Dial in G color using potentiometer 0-255 – Press button, show brightness on GREEN LED Dial in B color using potentiometer 0-255 – Press button, show brightness on BLUE LED Colors will show on individual L...

...technician to perform a series of optimizations on an Origin gaming laptop (model: EVO15-S) and install several Large Language Models (LLMs), including Mistral v0.2 Dolphin, Varuna, and Falcon LLMs, to enhance its performance. The ideal candidate will have extensive experience with hardware and software optimization, LLM installation, and the ability to follow specific instructions provided via tutorial links or documentation. Responsibilities: • Disk Space Cleanup: Thoroughly clean up the disk space to ensure optimal performance. • Performance Optimization: Implement measures to significantly enhance the laptop’s speed and responsiveness. • LLM Installation: Install the following LLMs on the laptop, ensuring they run smoothly without any issues: ...

I hope you are good. I have read your description carefully and understand everything. I’m Electronics engineer who have 25 year experience on analog design, renewable energy, power electro...I’m using Atmega chip instead of Arduino board as a platform to have cheapest solution.I’m using samples, libraries and Arduino IDE for developing any code. I have developed several codes for different kind of boards. I can do simulation by using Proteus also. There are Arduino models and code can be debugged by ELF file. Simulation result is same with real time application. I prefer using ESP32 for Bluetooth or Wifi. It’s code will be developed by Arduino IDE. Programming of it will be made by USB-to-UART converter. Since I have developed several codes until now...

I'm looking for a skilled mobile app developer to create a cross-platform app for both iOS and Android that is specifically designed to control a Bluetooth device. The app should have the following capabilities: - On/Off control: The primary function of the app is to switch on/off the Bluetooth device. - Set specific parameters: The app should allow users to set certain parameters on the device. - Draw trends of specific variables: The app should be able to illustrate trends of specific variables related to the device's performance. - Show and manage (download) log files: The app should have the capability to display and manage log files stored on the device, with the ability to download them. - Show the value of specific parameters: The app should display real-tim...

I'm looking for a part-time influencer to create engaging tutorial videos promoting our product on various social media platforms. Ideal Skillset: - Expertise in creating quality tutorial videos - Strong social media presence - Knowledgeable about our product for seamless promotion - Excellent communication skills

...Create Image supporting CXL implementation. - Image should tested with loadable module: ; ; ; cxl_port.ko. - QEMU: - If better support DAX. - I need the full-detailed tutorial on how to do it I am trying to to a developing the CXL support for Gem5. I finished the basic architecture and control/register design. Currently, I need a kernel booting reference from QEMU. The following is what I want: 1. target linux kernel version: 5.19-6.3. ARM64 2. target system image: Ubuntu. I need the image building tutorial. 3. the Kernel congiuration should support PCIE and CXL.(I can provide the .config file) 4. Compile the linux kernel's CXL-related modules, and put it in the image. Try to load/insmod the .ko mannuallly. 4.1. 4

...app developer who can do a project on infant child monitoring system. All data's will be given by hardware model making team..app should be done and data's should be created. First login page with an unique id and password. Then when we go inside it should have features of baby name, weight , body temperature, o2 level and humidity (these things data’s will be feeded from sensors controlled by esp32 module) Using yoso algorithm for speech detection, voices of mother, father and the caretaker voices are pre recorded. (So this project is basically abt babies in incubator…so in a room many babies will be there) so any other voices come other than those 3 it should show a stranger algorithm. Optional: Camera will be fixed and using cnn baby faces will be re...

Project Title: iOS Test App Development with BT Beacon Integration Project Overview: We are seeking an experienced iOS iPhone developer to create a unique test app featuring a Bluetooth (BT) Beacon for ultra short bi-directional communications. The goal of this project is twofold: first, to discuss the feasibility and requirements of the app through a paid chat session, and second, to develop a tiny, well-documented demo app for iPhone that integrates with BT Beacon technology. Key Content: - Integration of BT Beacon to facilitate sending messages and receiving responses. - Implementation of asynchronous bi-directional communications using BT Beacon protocol. - Development of a test app allowing users to type text, send messages, and receive responses on-screen. Prerequisite Expe...

As a beginner in MATLAB and Excel, I'm currently seeking an experienced programmer to guide me through the process of calculating RPM. The core objectives of this project are: -to clearly presented on the g-forces the riders will be exposed to for each of the 3 speeds, whether th... to produce a scatter plot representation of the imported data in MATLAB. This project primarily involves data from an experiment, so I'm aiming at gaining knowledge of not just importing data but also how to use MATLAB for data analysis. For you, prob need a bit of math skills, defin need to be good at sciences and Matlab, i am hoping someone that can explain to me in detail, step by step tutorial would be preferred. *NOT DOING MY ASSIGNMENT, BUT TEACH ME HOW TO DO IT *online meeting ...