/home/pi/PiClient/node_modules/rpi-gpio/rpi-gpio.js:358
        return currentPins[channel] + '';
                          ^

TypeError: Cannot read property '7' of undefined
    at getPinRpi (/home/pi/PiClient/node_modules/rpi-gpio/rpi-gpio.js:358:27)
    at Gpio.read.input (/home/pi/PiClient/node_modules/rpi-gpio/rpi-gpio.js:266:19)
    at Object.<anonymous> (/home/pi/PiClient/test.js:5:6)
    at Module._compile (module.js:624:30)
    at Object.Module._extensions..js (module.js:635:10)
    at Module.load (module.js:545:32)
    at tryModuleLoad (module.js:508:12)
    at Function.Module._load (module.js:500:3)
    at Function.Module.runMain (module.js:665:10)
    at startup (bootstrap_node.js:187:16)

var gpio = require('rpi-gpio');
gpio.(7, gpio.DIR_IN);
gpio.read(7, function (err, val) {
   console.log(err, val);
});