Nodejs pi-gpio不支持Raspberry Pi 3 Model B.

Question

我只想在Raspberry pi 3型号上打开一个带有pi-gpio的简单led。问题是，当我启动程序时，我收到如下错误：

root@raspberrypi:/node# node app.js
Error when trying to open pin 16
gpio-admin: could not flush data to /sys/class/gpio/export: Device or resource busy

/node/app.js:4
if(err) throw err;
              ^
  Error: Command failed: /bin/sh -c gpio-admin export 23 
  gpio-admin: could not flush data to /sys/class/gpio/export: Device or resource busy

  at ChildProcess.exithandler (child_process.js:751:12)
  at ChildProcess.emit (events.js:110:17)
  at maybeClose (child_process.js:1015:16)
  at Socket.<anonymous> (child_process.js:1183:11)
  at Socket.emit (events.js:107:17)
  at Pipe.close (net.js:485:12)
  root@raspberrypi:/node# 

这是我的app.js

var gpio = require("pi-gpio");

gpio.open(16,"output",function(err){
    if(err) throw err;
    gpio.write(16, true, function(err){
            if(err) throw err;
            console.log("ouput on pin 16 ok");
    });

});

我已尝试安装其他模块，例如rpi-gpio，但没有任何改变。