{"page":"\u003clink rel=\"stylesheet\" href=\"https://lessonplanet.com/assets/packs/css/resources-c03aa079.css\" /\u003e\n\u003clink rel=\"stylesheet\" href=\"https://lessonplanet.com/assets/packs/css/lp_boclips_stylesheets-517835be.css\" media=\"all\" /\u003e\n\u003cdiv data-title='Using Serial.read() with Arduino | Part 1' data-url='/boclips/videos/62a0e48be5902514c069752a' data-video-url='/boclips/videos/62a0e48be5902514c069752a' id='bo_player_modal'\u003e\n\u003cdiv class='boclips-resource-page modal-dialog panel-container'\u003e\n\u003cdiv class='react-notifications-root'\u003e\u003c/div\u003e\n\u003cdiv class='rp-header'\u003e\n\u003cdiv class='rp-type'\u003e\n\u003ci aria-hidden='true' class='fai fa-regular fa-circle-play'\u003e\u003c/i\u003e\nVideo\n\u003c/div\u003e\n\u003ch1 class='rp-title' id='video-title'\u003e\nUsing Serial.read() with Arduino | Part 1\n\u003c/h1\u003e\n\u003cdiv class='rp-actions'\u003e\n\u003cdiv class='mr-1'\u003e\n\u003ca class=\"btn btn-success\" data-posthog-event=\"Signup: LP Signup Activity\" data-posthog-location=\"body_link_boclips\" data-remote=\"true\" href=\"/subscription/new\"\u003e\u003cspan\u003e\u003cspan\u003eGet Free Access\u003c/span\u003e\u003cspan class=\"\"\u003e for 10 Days\u003c/span\u003e\u003cspan\u003e!\u003c/span\u003e\u003c/span\u003e\u003c/a\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv class='rp-body'\u003e\n\u003cdiv class='rp-info'\u003e\n\u003cdiv aria-label='Hide resource details' class='rp-hide-info' role='button' tabindex='0'\u003e\u0026times;\u003c/div\u003e\n\u003ci aria-label='Expand resource details' class='rp-expand-info fai fa-solid fa-up-right-and-down-left-from-center' role='button' tabindex='0'\u003e\u003c/i\u003e\n\u003ci aria-label='Compress resource details' class='rp-compress-info fai fa-solid fa-down-left-and-up-right-to-center' role='button' tabindex='0'\u003e\u003c/i\u003e\n\u003cdiv class='rp-rating'\u003e\n\u003cspan class='resource-pool'\u003e\n\u003cspan class='pool-label'\u003ePublisher:\u003c/span\u003e\n\u003cspan class='pool-name'\u003e\n\u003cspan class='text'\u003e\u003ca data-publisher-id=\"30358947\" href=\"/search?publisher_ids%5B%5D=30358947\"\u003eProgramming Electronics Academy\u003c/a\u003e\u003c/span\u003e\n\u003c/span\u003e\n\u003c/span\u003e\n\u003c/div\u003e\n\u003cdiv class='rp-description'\u003e\n\u003cspan class='short-description'\u003eAre you trying to use Serial.read() to get data from a serial port to your Arduino?  Maybe you’re using the Arduino Serial Monitor window and sending in data, or maybe you’ve got a program running on your raspberryPi sending data via...\u003c/span\u003e\n\u003cspan class='full-description hide'\u003eAre you trying to use Serial.read() to get data from a serial port to your Arduino?  Maybe you’re using the Arduino Serial Monitor window and sending in data, or maybe you’ve got a program running on your raspberryPi sending data via serial to your Arduino board.\u003cbr/\u003e\u003cbr/\u003eHow do you use serial.read() to receive the data, and piece it together correctly? In this lesson you will learn exactly how to use Serial.read() to receive data from the serial port and stitch it together as one value.\u003cbr/\u003e\u003cbr/\u003eAN OVERVIEW WHAT WE’LL COVER:\u003cbr/\u003eThe big picture of serial communication\u003cbr/\u003eThe serial buffer\u003cbr/\u003eSerial.read and Serial.available\u003cbr/\u003eDeveloping a protocol and strategy for reading in data from the serial port\u003cbr/\u003eImplement the strategy in Arduino code\u003cbr/\u003eBONUS: How to convert the serial data from a string to an integer\u003cbr/\u003eTHE BIG PICTURE OF SERIAL COMMUNICATION\u003cbr/\u003eLet’s take a step back from Serial.read(), and talk about Serial Communication.\u003cbr/\u003e\u003cbr/\u003eSerial communication is the process of sending one bit of data at a time, sequentially, from one place to another. Like say, sending data from your raspberryPi to a connected Arduino, or vice versa.\u003cbr/\u003e\u003cbr/\u003eUSB is one of the most common methods used for serial communication, hence the name Universal Serial Bus. Using Arduino we can easily send and receive data over a USB cable with the built-in Arduino Serial Library.\u003cbr/\u003e\u003cbr/\u003eNow if you don’t know what an Arduino library is, it’s basically a bunch of code that has been bundled together, because it is often used together.\u003cbr/\u003e\u003cbr/\u003eImagine you were a barber, maybe you have a specific drawer in your barber shop for all your hair cutting tools. Every time somebody walks in for a haircut, you know exactly where to look, in that hair cutting drawer, and all your tools are right there.\u003cbr/\u003e\u003cbr/\u003eMaybe you have another drawer with all the stuff you need for dying peoples hair, when someone walks in and asks to get their hair dyed red, you know exactly which drawer to open.  Same thing with Arduino libraries. Arduino libraries put together a bunch of software functions that help you with specific tasks.\u003cbr/\u003e\u003cbr/\u003eSERIAL LIBRARY FUNCTIONS\u003cbr/\u003eFor serial communication, we can use the built-in Arduino Serial library.\u003cbr/\u003e\u003cbr/\u003eThe Serial library has functions like:\u003cbr/\u003e\u003cbr/\u003eSerial.begin()\u003cbr/\u003eSerial.read()\u003cbr/\u003eSerial.available()\u003cbr/\u003eSerial.parseInt()\u003cbr/\u003eSerial.parseString()\u003cbr/\u003eSerial.parseFloat()\u003cbr/\u003eSerial.print()\u003cbr/\u003eSerial.captCrunch()\u003cbr/\u003eOK, we know that Serial Communication over USB is how we can talk between one device and another, and we know that the Arduino Serial library is the set of tools we’ll use for serial communication. But where does the data that comes from another device actually go on the Arduino?\u003cbr/\u003e\u003cbr/\u003eTHE SERIAL BUFFER\u003cbr/\u003eThe answer is the serial buffer, or perhaps more precisely, the serial receive buffer. When bits of data start streaming in from your computer, a piece of hardware on your Arduino called a UART will assemble each of the 8 bits into a byte, and store those bytes for you in the Serial Receive Buffer.\u003cbr/\u003e\u003cbr/\u003eThe serial receive buffer can hold 64 bytes.\u003cbr/\u003e\u003cbr/\u003eThe data you send from your computer, to your Arduino, will end up in the serial receive buffer.\u003cbr/\u003e\u003cbr/\u003eHow do you get this data? That is where Serial.read() comes in.\u003cbr/\u003e\u003cbr/\u003eSERIAL.READ()\u003cbr/\u003eSerial.read() is a function of the Serial library. What it does is read out the first available byte from the serial receive buffer. When it reads it out, it removes that byte from the buffer.\u003cbr/\u003e\u003cbr/\u003eSay you had sent the phrase “Sub Sandwich” to your Arduino. 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