我最近下载了 Intel XDK IOT 版本并使用了 LED 引脚 13 闪烁示例。
然后我将程序上传到爱迪生上，但它出现了一些错误；其中之一是找不到 MRAA 模块。附带的示例代码是：
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)
}
包.JSON：
{
"name": "Onboard LED Blink App",
"description": "",
"version": "0.0.0",
"main": "main.js",
"engines": {
"node": ">=0.10.0"
},
"dependencies": {
}
}
根据您使用的 Edison 固件版本，Node.js 的 mraa 模块可能无法正确安装。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
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