diff --git a/CHANGELOG.md b/CHANGELOG.md
index aaa3d27..df69e8b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,10 @@
 All notable changes to this project is documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [2.1.0]
+
+Added support for arbitrary extension fields.
+
 ## [2.0.1]
 
 This is a maintenance release to modernize the development environment. There are no changes in the code of the module so these updates should not affect the functionality of the module.
diff --git a/MMM-RemoteTemperature.css b/MMM-RemoteTemperature.css
index 816fea0..40bd909 100644
--- a/MMM-RemoteTemperature.css
+++ b/MMM-RemoteTemperature.css
@@ -11,6 +11,11 @@
   margin-left: 15px;
 }
 
+.MMM-RemoteTemperature .ext {
+  display: inline-block;
+  margin-left: 15px;
+}
+
 .MMM-RemoteTemperature .more {
   margin: 0;
 }
diff --git a/MMM-RemoteTemperature.js b/MMM-RemoteTemperature.js
index 13e03d1..fc35f19 100644
--- a/MMM-RemoteTemperature.js
+++ b/MMM-RemoteTemperature.js
@@ -9,7 +9,8 @@ Module.register('MMM-RemoteTemperature', {
   defaults: {
     sensorId: null,
     icon: 'home',
-    showMore: true
+    showMore: true,
+    ext: []
   },
 
   requiresVersion: '2.1.0',
@@ -68,6 +69,19 @@ Module.register('MMM-RemoteTemperature', {
 
       wrapper.appendChild(firstLineEl);
 
+      if (this.viewModel.ext) {
+        const extLineEl = document.createElement('div');
+
+        this.viewModel.ext.forEach((extData) => {
+          const extEl = document.createElement('span');
+          extEl.innerHTML = `${extData.value}${extData.unit}`;
+          extEl.classList = 'ext';
+          extLineEl.appendChild(extEl);
+        });
+
+        wrapper.appendChild(extLineEl);
+      }
+
       if (this.config.showMore) {
         const secondLineEl = document.createElement('div');
         secondLineEl.classList = 'more dimmed small';
@@ -96,6 +110,7 @@ Module.register('MMM-RemoteTemperature', {
           temp: payload.temp,
           humidity: payload.humidity,
           battery: payload.battery,
+          ext: this._parseExtFields(payload.ext),
           timestamp: Date.now()
         };
 
@@ -112,5 +127,27 @@ Module.register('MMM-RemoteTemperature', {
 
   _formatTimestamp(timestamp) {
     return moment(timestamp).format('HH:mm');
+  },
+
+  _parseExtFields(extPayload) {
+    const parsedExtValues = [];
+
+    if (this.config.ext && extPayload) {
+      this.config.ext.forEach((extConfig) => {
+        const { name } = extConfig;
+        const value = extPayload[name];
+        const unit = extConfig.unit || '';
+
+        if (typeof value !== 'undefined') {
+          parsedExtValues.push({
+            name,
+            value,
+            unit
+          });
+        }
+      });
+    }
+
+    return parsedExtValues;
   }
 });
diff --git a/README.md b/README.md
index 6cc88d5..e1e9b8d 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,11 @@ If the sensor sends battery level data, it can be displayed in the second line:
 
 ![Default](./doc/screenshot-with-battery.png)
 
+If your sensor can send more data then the module can display these arbitrary values in a new line:
+
+![Default](./doc/screenshot-ext-data.png)
+
+
 If the sensor does not send humidity data, then only the temperature is displayed:
 
 ![Default](./doc/screenshot-temp-only.png)
@@ -89,6 +94,7 @@ For security reasons the MagicMirror is *not* reachable externally, which also m
 | `sensorId` | **REQUIRED** An arbitrary value that determines from which sensor this module accepts updates. It can also be used as an API key to restrict access to your mirror.<br><br> **Type:** `string` <br>**Default value:** `null` (must be configured)
 | `icon`     | *Optional* Name of a [FontAwesome icon](https://fontawesome.com/icons?d=gallery) that is displayed before the temperature value. For example set to `'home'` to indicate that the mirror displays an indoor value or `'car'` if you show the temperature your car enjoys in the garage. You can set it to `null` to not display any symbol. <br><br> **Type:** `string` <br>**Default value:** `'home'`
 | `showMore` | *Optional* Determines whether a second line with additional data (e.g. timestamp of the last data update and battery level) should be displayed on the mirror. <br><br> **Type:** `boolean` <br>**Default value:** `true`
+| `ext`      | *Optional* Configuration of additional data fields to display. See the `Show more data` section on this page for more information.<br><br> **Type:** `Array` <br>**Default value:** `[]`
 
 ## How it works
 
@@ -119,6 +125,46 @@ The `sensorId` property must be a `string`, and can contain any value, but it is
 
 Make sure that your sensor properly sets the `Content-Type` header in the HTTP request to `application/json`, otherwise the module will not be able to parse the request body.
 
+### Show more data
+
+If your sensor is capable to post additional data you can use this module to display these arbitrary values in a second data line.
+
+First, you have to specify the name and optionally the unit of the extensional data fields in the `ext` property of the module configuration. For example to display barometric pressure and wind speed:
+
+```js
+  config: {
+    sensorId: '1',
+    icon: 'home',
+    showMore: true,
+    ext: [
+      { name: 'pressure', unit: ' hPa' },
+      { name: 'windspeed', unit: ' km/h' }
+    ]
+  }
+```
+
+Then you have to program your sensor to specify the measured values in the `ext` object in the posted JSON:
+
+```javascript
+{
+  "temp": 27,
+  "humidity": 30.4,
+  "battery": 100,
+  "sensorId": "1",
+  "ext": {
+    "pressure": 1015,
+    "windspeed": 23
+  }
+}
+```
+
+Note that the names `pressure` and `windspeed` are completely arbitrary, you can choose any name you want, but it is important that the key name in the `ext` object in the POSTed data must match with the `name` value in the module configuration. The module ignores those data values that are sent by the sensor but not specified in the module configuration.
+
+The `unit` is an optional field in the configuration. If specified, it's string value will be appended to the measured value as a postfix.
+
+In this way you can specify as many extension fields as you want, they will be displayed in one line within the module.
+
+
 ## Recommended hardware
 
 The recommended and tested hardware sensor for this module is [SolarTherm](https://github.com/balassy/solar-wifi-weather-station). Both the hardware and the software of SolarTherm is open-source, and can be built as a DIY project. SolarTherm has built-in support for this MMM-RemoteTemperature module, and can push measured data also to other popular services, like Blynk and ThingSpeak.
diff --git a/doc/screenshot-ext-data.png b/doc/screenshot-ext-data.png
new file mode 100644
index 0000000..dca9db4
Binary files /dev/null and b/doc/screenshot-ext-data.png differ
diff --git a/node_helper.js b/node_helper.js
index bf7ddd6..b8d2cd2 100644
--- a/node_helper.js
+++ b/node_helper.js
@@ -24,7 +24,8 @@ module.exports = NodeHelper.create({
       temp: params.temp,
       humidity: params.humidity,
       battery: params.battery,
-      sensorId: params.sensorId
+      sensorId: params.sensorId,
+      ext: params.ext
     };
 
     this.sendSocketNotification('MMM-RemoteTemperature.VALUE_RECEIVED', payload);
diff --git a/package.json b/package.json
index 23931eb..4039e96 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "MMM-RemoteTemperature",
-  "version": "2.0.1",
+  "version": "2.1.0",
   "description": "MagicMirror module that displays temperature value from a remote sensor.",
   "main": "MMM-RemoteTemperature.js",
   "author": "György Balássy",