diff --git a/modules/@amperka/mhz19.js b/modules/@amperka/mhz19.js
new file mode 100644
index 0000000..7606448
--- /dev/null
+++ b/modules/@amperka/mhz19.js
@@ -0,0 +1,34 @@
+var MHZ19 = function(opts) {
+  opts = opts || {};
+  this._serial = opts.port;
+  this._serial.setup(opts.speed, {rx: opts.rx, tx: opts.tx});
+};
+
+MHZ19.prototype.calibrate = function() {
+  this._serial.write('\xFF\x01\x87\x00\x00\x00\x00\x00\x78');
+};
+
+MHZ19.prototype.abcOn = function() {
+  this._serial.write('\xFF\x01\x79\xA0\x00\x00\x00\x00\xE6');
+};
+
+MHZ19.prototype.abcOff = function() {
+  this._serial.write('\xFF\x01\x79\x00\x00\x00\x00\x00\x86');
+};
+
+MHZ19.prototype.read = function() {
+  this._serial.write('\xFF\x01\x86\x00\x00\x00\x00\x00\x79');
+  var data = this._serial.read(9);
+  var a = [];
+  for (var i=0; i < data.length; i++) {
+    a.push(data.charCodeAt(i));
+  }
+  var status = (256 - (a[1]+a[2]+a[3]+a[4]+a[5]+a[6]+a[7])%256) === a[8];
+  var co2 = a[2] * 256 + a[3];
+  var temp = a[4]-40;
+  return {status: status, co2: co2, temp: temp};
+};
+
+exports.connect = function(opts) {
+  return new MHZ19(opts);
+};