diff --git a/source/_posts/2015-04-25-release-notes.markdown b/source/_posts/2015-04-25-release-notes.markdown
new file mode 100644
index 00000000000..f34500f8521
--- /dev/null
+++ b/source/_posts/2015-04-25-release-notes.markdown
@@ -0,0 +1,98 @@
+---
+layout: post
+title: "Release notes for April 25, 2015"
+description: "Introducing support for line charts, a logbook, ISY994 hub, Transmission and modbus."
+date: 2015-04-25 6:57 -0700
+date_formatted: "April 25, 2015"
+comments: true
+categories: release-notes
+---
+
+It's been a month since the latest update and a lot has happened again. Here a quick overview of the new things.
+
+__Line Charts__
+[James](https://github.com/jamespcole) has upgraded the history in the frontend to support line graphs. Line graphs will be shown for any entity that has a unit of measurement. The line graphs will also be shown in the more info card of an entity. [See the demo for a live example.](/demo/)
+
+
+
+
+
+__ISY994 hub support__
+
+[Ryan](https://github.com/rmkraus) has contributed support to integrate the ISY994 hub by Universal Devices. This allows you to integrate your X10/Insteon sensors, switches and lights.
+
+He has created an extensive getting started guide which can be found on [the ISY994 component page](/components/isy994.html).
+
+```yaml
+# Example configuration.yaml entry
+isy994:
+```
+
+__Logbook__
+
+I (Paulus) have added a logbook component. The logbook component provides a different perspective on the history of your house by showing all the changes that happened to your house in chronological order. [See the demo for a live example.](/demo/)
+
+
+```yaml
+# Example configuration.yaml entry
+logbook:
+```
+
+__Transmission support__
+
+James has also contributed support for integrating Transmission into Home Assistant.
+
+```yaml
+# Example configuration.yaml entry
+sensor:
+ platform: transmission
+ name: Transmission
+ host: 192.168.1.26
+ port: 9091
+ username: YOUR_USERNAME
+ password: YOUR_PASSWORD
+ monitored_variables:
+ - type: 'current_status'
+ - type: 'download_speed'
+ - type: 'upload_speed'
+```
+
+__Modbus support__
+[Kixam](https://github.com/kixam) has contributed support for modbus, a serial communication protocol to control PLCs. It currently supports sensors and switches which can be controlled over serial, TCP and UDP connections.
+
+```yaml
+# Example configuration.yaml entry
+modbus:
+ type: serial
+ method: rtu
+ port: /dev/ttyUSB0
+ baudrate: 9600
+ stopbits: 1
+ bytesize: 8
+ parity: N
+
+sensor:
+ platform: modbus
+ slave: 1
+ registers:
+ 16:
+ name: My integer sensor
+ unit: C
+ 24:
+ bits:
+ 0:
+ name: My boolean sensor
+ 2:
+ name: My other boolean sensor
+
+switch:
+ platform: modbus
+ slave: 1
+ registers:
+ 24:
+ bits:
+ 0:
+ name: My switch
+ 2:
+ name: My other switch
+```
diff --git a/source/components/history.markdown b/source/components/history.markdown
index 4eaf131195a..cfb8a9cd916 100644
--- a/source/components/history.markdown
+++ b/source/components/history.markdown
@@ -1,7 +1,7 @@
---
layout: page
title: "History support"
-description: "Instructions how enable historyt support for Home Assistant."
+description: "Instructions how to enable history support for Home Assistant."
date: 2015-03-23 19:59
sidebar: false
comments: false
diff --git a/source/components/index.markdown b/source/components/index.markdown
index 13bc6db4d3f..92382c0dbfb 100644
--- a/source/components/index.markdown
+++ b/source/components/index.markdown
@@ -82,6 +82,12 @@ Entities are things that you want to observe within Home Assistant. Support for
Offers presence detection by scanning the network for connected devices. |
+
+  |
+ Transmission |
+ Monitor status and download speeds. |
+
+
 |
Google Cast devices |
@@ -104,6 +110,7 @@ Home Assistant integrates with a variety of third party Home Automation hubs and
[
](/components/tellstick.html)
[
](/components/vera.html)
[
](/components/wink.html)
+[
](/components/modbus.html)
## {% linkable_title Services %}
@@ -127,6 +134,12 @@ Home Assistant integrates with a variety of third party Home Automation hubs and
Scans the network for supported devices. |
+
+ |
+Logbook |
+Provides a logbook-style view on the Entity history. |
+
+
 |
PushBullet |
diff --git a/source/components/logbook.markdown b/source/components/logbook.markdown
new file mode 100644
index 00000000000..ecfa48ca5f9
--- /dev/null
+++ b/source/components/logbook.markdown
@@ -0,0 +1,19 @@
+---
+layout: page
+title: "Logbook support"
+description: "Instructions how to enable the logbook component for Home Assistant."
+date: 2015-04-25 9:23
+sidebar: false
+comments: false
+sharing: true
+footer: true
+---
+
+
+The logbook component provides a different perspective on the history of your house by showing all the changes that happened to your house in chronological order. [See the demo for a live example.](/demo/)
+
+
+```yaml
+# Example configuration.yaml entry
+logbook:
+```
diff --git a/source/components/modbus.markdown b/source/components/modbus.markdown
new file mode 100644
index 00000000000..0ef74914b12
--- /dev/null
+++ b/source/components/modbus.markdown
@@ -0,0 +1,50 @@
+---
+layout: page
+title: "Modbus"
+description: "Instructions how to integrate Modbus within Home Assistant."
+date: 2015-04-25 9:16
+sidebar: false
+comments: false
+sharing: true
+footer: true
+---
+
+
+Modbus is a serial communication protocol to control PLCs. It currently supports sensors and switches which can be controlled over serial, TCP and UDP connections.
+
+```yaml
+# Example configuration.yaml entry
+modbus:
+ type: serial
+ method: rtu
+ port: /dev/ttyUSB0
+ baudrate: 9600
+ stopbits: 1
+ bytesize: 8
+ parity: N
+
+sensor:
+ platform: modbus
+ slave: 1
+ registers:
+ 16:
+ name: My integer sensor
+ unit: C
+ 24:
+ bits:
+ 0:
+ name: My boolean sensor
+ 2:
+ name: My other boolean sensor
+
+switch:
+ platform: modbus
+ slave: 1
+ registers:
+ 24:
+ bits:
+ 0:
+ name: My switch
+ 2:
+ name: My other switch
+```
diff --git a/source/components/sensor.transmission.markdown b/source/components/sensor.transmission.markdown
new file mode 100644
index 00000000000..aec422fee05
--- /dev/null
+++ b/source/components/sensor.transmission.markdown
@@ -0,0 +1,28 @@
+---
+layout: page
+title: "Transmission support"
+description: "Instructions how to integrate Transmission within Home Assistant."
+date: 2015-04-25 9:06
+sidebar: false
+comments: false
+sharing: true
+footer: true
+---
+
+
+James Cole has contributed support to integrate Transmission. This will allow you to monitor your downloads from within Home Assistant and setup automation based on the information.
+
+```yaml
+# Example configuration.yaml entry
+sensor:
+ platform: transmission
+ name: Transmission
+ host: 192.168.1.26
+ port: 9091
+ username: YOUR_USERNAME
+ password: YOUR_PASSWORD
+ monitored_variables:
+ - type: 'current_status'
+ - type: 'download_speed'
+ - type: 'upload_speed'
+```
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