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Control Raspberry Pi GPIO with Node.js - Maker Pro
https://maker.pro/raspberry-pi/tutorial/how-to-control-a-raspberry-pi-gpio-pin-with-a-nodejs-web-server
WEBMay 30, 2019 · if (buttonState != LEDPin. readSync ()) { //Change LED state if button state is changed LEDPin. writeSync (buttonState); //turn LED on or off. }); We have created both the web server and the HTML files, so it’s time to run the web server and control the GPIO pin of the Raspberry Pi.
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An introduction to Raspberry Pi 4 GPIO and controlling it with
https://medium.com/sysf/an-introduction-to-raspberry-pi-4-gpio-and-controlling-it-with-node-js-10f2ce41af12
WEBDec 15, 2019 · An instance of Gpio class provides high-level API to interact with that pin. The writeSync method writes either 1 or 0 to the pin which enables or disables it.
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Node.js Raspberry Pi GPIO - Blinking LED - W3Schools
https://www.w3schools.com/nodejs/nodejs_raspberrypi_blinking_led.asp
WEBLED.writeSync(1); //set pin state to 1 (turn LED on) } else { LED.writeSync(0); //set pin state to 0 (turn LED off) }} function endBlink() { //function to stop blinking clearInterval(blinkInterval); // Stop blink intervals LED.writeSync(0); // Turn LED off LED.unexport(); // Unexport GPIO to free resources}
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Getting Started with the Raspberry Pi GPIO Pins in Node.js - SitePoint
https://www.sitepoint.com/getting-started-with-the-raspberry-pi-gpio-pins-in-node-js/
WEBJul 6, 2016 · To write to a pin on the board and test this, one can do: gpio.write(16, 5, function () { const value = fs.readFileSync('/sys/class/gpio/gpio23/value').toString();... writesync
writesync
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fivdi/onoff: GPIO access and interrupt detection with Node.js - GitHub
https://github.com/fivdi/onoff
WEBwrite(value[, callback]) - Write GPIO value asynchronously; writeSync(value) - Write GPIO value synchronously; watch(callback) - Watch for hardware interrupts on the GPIO; unwatch([callback]) - Stop watching for hardware interrupts on the GPIO; unwatchAll() - Remove all watchers for the GPIO; direction() - Get GPIO direction
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Node.js Raspberry Pi - GPIO Introduction - W3Schools
https://www.w3schools.com/nodejs/nodejs_raspberrypi_gpio_intro.asp
WEBThis is an illustration of the Raspberry Pi 3. The GPIO pins are the small red squares in two rows on the right side of the Raspberry Pi, on the actual Raspberry Pi they are small metal pins. The Raspberry Pi 3 has 26 GPIO pins, the rest of the pins are power, ground or "other". The pin placements correspond with the table below. writesync
writesync
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onoff - npm
https://www.npmjs.com/package/onoff/v/2.0.0
WEB57 Versions. onoff. GPIO access and interrupt detection with Node.js on Linux boards like the Raspberry Pi, C.H.I.P. or BeagleBone. onoff supports Node.js versions 4, 6, 8 and 9. Contents. Installation. Usage. API. How Does onoff Work? Configuring Pullup and Pulldown Resistors. Benchmarks. Related Packages. Additional Information. Installation.
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Controlling Real World Objects with Raspberry Pi and Node.js
https://simonprickett.dev/controlling-real-world-objects-with-raspberry-pi-and-node-js/
WEBwriteSync expects an integer not a boolean, so we send 1 for true, and 0 for false. If the request was a GET, and also for all POST requests, the server then calls the readSync function on the appropriate relay GPIO object to get its on/off state, translating the 1 or 0 response to true or false and returning that to the client.
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Async raspberry pi gpio events in nodejs - Stack Overflow
https://stackoverflow.com/questions/14440204/async-raspberry-pi-gpio-events-in-nodejs
WEBJan 21, 2013 · gpio.read(16, function(err, value) { if(err) throw err; console.log(value); // The current state of the pin }); Is there any solution to bind events asynchronously? In this example this would be whenever the button is pressed.
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RasPi GPIO Intro. - CodexCoach
https://codexcoach.com/language/node-js-and-raspberry-pi/node-js-raspberry-pi-gpio/
WEBled.writeSync(value); setTimeout(blink, 500); // Toggle every 500ms } blink(); // Start blinking // Cleanup on exit . process.on('SIGINT', () => { . led.writeSync(0); // Turn LED off . led.unexport(); // Unexport GPIO and free resources .
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