May 29, 2013 The video below walks through the all the code and explains what is going on. Here are all the links that were used in the video: Chrome Extension and Arduino Sketch Example Files Chrome Serial API Page Brackets Open Source Web Editor Share the post 'Using the Chrome Serial API with Arduino'FacebookTwitterGoogle+. Adobe's evangelist Renaun, created a video to explain how to use Chrome's serial API to talk with an Arduino board as well as receive data from it. You just need to run this sketch file on your board and then run the code in Chrome. Watch the video below to hear Renaun commenting the code!
Active5 years, 10 months ago
I'm working on a Google Chrome extension that communicates with an Arduino UNO over serial. I wrote the following function
sendSerialCmd
that takes a port (string), a serial_cmd (ArrayBuffer), and a callback function that gets passed readInfo.data (an ArrayBuffer) that is read in from the serial connection.One of the problems I've run into is the third parameter passed to the
chrome.serial.read()
function. In the chrome.serial API, the third parameter is the bytesToRead ( integer ): The number of bytes to read, however, the number of bytes coming in from my Arduino are subject to change. Sometimes I may get 8 bytes, other times more. What's the best way of getting all the bytes sent back from my Arduino? DAM possibly is the only software that can capture and download social flash videos, music and more from Google Chrome browser. Internet download manager accelerator.
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Arduino has a novel solution through a function called Serial.available() which returns the number of bytes available to read. Is there something similar I can do with the Chrome.serial API?
rafiki_rafirafiki_rafi71511 gold badge66 silver badges2424 bronze badges
1 Answer
There is no similar functionality to
Serial.available()
in the Chrome serial API, but you should just poll for some reasonable number of bytes and process the data at your own pace.If a
read
is requested for (say) 1024 bytes and only 8 bytes are available, the read
should still succeed quickly with just 8 bytes. If there is an 8-byte message and a 12-byte message available, the read
will succeed with 20 bytes and you can apply whatever logic is necessary to parse the resulting data. Download smaart 7 windows 10 for free. Education software downloads - Smaart by Rational Acoustics LLC and many more programs are available for instant and free download.
FYI, the serial API is changing soon in Canary and you will no longer be responsible for manually polling with
read
. Instead Chrome will poll for you and fire chrome.serial.onReceive
events as data is available from an open device.Ken RockotKen Rockot
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Active5 years, 2 months ago
This is my first attempt at developing with a chrome app or extension. I have a GPS receiver on the USB port which is emulated as a serial device.
Running this code
gets me '/dev/ttyUSB0' in the console, so it appears to be finding the device.
Chrome Serial Api Download
How do I then connect to the device? I've included the serial.connect line above, with the following functions:
but I get the following error:
Error in response to serial.connect: ReferenceError: _this is not defined at Object.onGetDevices [as callback]
I'm not sure exactly what I'm doing right or wrong here so any pointers appreciated.
Xan57.6k1010 gold badges122122 silver badges145145 bronze badges
user2672288
1 Answer
First the example does not work properly. Try this instead:
Chrome Serial Api Example
Now as for the actual reading of the input from the serial connection it will work but converting the ArrayBuffer to a string is a bit harder than expected.
Chrome Serial Api Arduino
Joe KasavageJoe Kasavage