英特尔Edison MRAA模块无法正常工作

Question

我最近下载了Intel XDK IOT版本并使用了LED引脚13 Blink示例.然后我把程序上传到爱迪生,但它出现了一些错误; 其中一个是它无法找到MRAA模块.随附的示例代码是:main.js:

var mraa = new require("mraa"); //require mraa
console.log('MRAA Version: ' + mraa.getVersion()); //write the mraa version to the Intel XDK console

var myOnboardLed = new mraa.Gpio(13); //LED hooked up to digital pin 13 (or built in pin on Galileo Gen1 & Gen2)
myOnboardLed.dir(mraa.DIR_OUT); //set the gpio direction to output
var ledState = true; //Boolean to hold the state of Led

periodicActivity(); //call the periodicActivity function

function periodicActivity()
{
  myOnboardLed.write(ledState?1:0); //if ledState is true then write a '1' (high) otherwise write a '0' (low)
  ledState = !ledState; //invert the ledState
  setTimeout(periodicActivity,1000); //call the indicated function after 1 second (1000 milliseconds)
}

的package.json:

{
  "name": "Onboard LED Blink App",
  "description": "",
  "version": "0.0.0",
  "main": "main.js",
  "engines": {
    "node": ">=0.10.0"
  },
  "dependencies": {
  }
}

Answer 1

根据您拥有的Edison固件版本,可能无法正确安装Node.js的mraa模块.要安装最新版本的mraa,请将Edison连接到互联网(通过wifi)并通过ssh或串行终端运行以下命令

echo "src mraa-upm http://iotdk.intel.com/repos/1.1/intelgalactic" > /etc/opkg/mraa-upm.conf
okpg update
opkg upgrade

Answer 2

echo "src mraa-upm http://iotdk.intel.com/repos/1.1/intelgactic " > /etc/opkg/mraa-upm.conf opkg 更新 opkg 安装 libmraa0

上面的答案有拼写错误，应该是“mraa”而不是“maa”，opkg 不是 okpg