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blog/2016/07/01/envisalink-homematic-hdmi-cec-and-sony-bravia-tv/index.html
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@ -233,6 +233,12 @@
<ul class="divided">
<li class="post">
<a href="/blog/2016/07/28/esp8266-and-micropython-part1/">ESP8266 and MicroPython - Part 1</a>
</li>
<li class="post">
<a href="/blog/2016/07/23/internet-of-things-data-exploration-with-jupyter-notebooks/">IoT Data Exploration with Jupyter Notebooks</a>
</li>
@ -256,8 +262,6 @@
</li>
</ul>
</section>

12
blog/2016/07/06/pocketchip-running-home-assistant/index.html
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@ -236,6 +236,12 @@ $ hass --open-ui
<ul class="divided">
<li class="post">
<a href="/blog/2016/07/28/esp8266-and-micropython-part1/">ESP8266 and MicroPython - Part 1</a>
</li>
<li class="post">
<a href="/blog/2016/07/23/internet-of-things-data-exploration-with-jupyter-notebooks/">IoT Data Exploration with Jupyter Notebooks</a>
</li>
@ -255,12 +261,6 @@ $ hass --open-ui
<li class="post">
<a href="/blog/2016/07/01/envisalink-homematic-hdmi-cec-and-sony-bravia-tv/">0.23: Envisalink, Homematic, HDMI-CEC and Sony Bravia TV</a>
</li>
</ul>
</section>

16
blog/2016/07/16/sqlalchemy-knx-join-simplisafe/index.html
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@ -135,10 +135,10 @@ $ hass --script db_migrator --config /path/to/config
<li>Media Player: <a href="/components/media_player.plex/">Plex</a> will no longer spam the logs if server goes offline (<a href="https://github.com/dale3h/">@dale3h</a>)</li>
<li>Sensor: <a href="/components/sensor.apcupsd/">APCUPSd Sensor</a> now supports names, icons and units (<a href="https://github.com/dale3h/">@dale3h</a>)</li>
<li>Lock: <a href="/components/lock.verisure/">Verisure</a> entities will now use name instead of serial number for entity id (<a href="https://github.com/turbokongen/">@turbokongen</a>)</li>
<li>[StatsD] can now also export attributes (<a href="https://github.com/bah2830/">@bah2830</a>)</li>
<li><a href="/components/statsd/">StatsD</a> can now also export attributes (<a href="https://github.com/bah2830/">@bah2830</a>)</li>
<li>Support for <a href="/components/knx/">KNX</a> added (<a href="https://github.com/usul27">@usul27</a>)</li>
<li>Switch: <a href="/components/switch.tplink/">TPLink</a> HS100/HS110 now supported (<a href="https://github.com/GadgetReactor">@GadgetReactor</a>)</li>
<li>Stability fixes for [RFXTRX] ([@Danielhiversen])</li>
<li>Stability fixes for <a href="//components/rfxtrx/">RFXtrx</a> (<a href="https://github.com/danielhiversen">@Danielhiversen</a>)</li>
<li>Tweaks to <a href="/components/zwave/">Z-Wave</a> (<a href="https://github.com/turbokongen/">@turbokongen</a>)</li>
<li>Light: <a href="/components/light/">Brightness</a> now clamped to 0-255 (<a href="https://github.com/keatontaylor">@keatontaylor</a>)</li>
<li>Thermostat: <a href="/components/thermostat.radiotherm/">Radiotherm</a> HVAC mode now supported (<a href="https://github.com/danieljkemp">@danieljkemp</a>)</li>
@ -230,6 +230,12 @@ $ hass --script db_migrator --config /path/to/config
<ul class="divided">
<li class="post">
<a href="/blog/2016/07/28/esp8266-and-micropython-part1/">ESP8266 and MicroPython - Part 1</a>
</li>
<li class="post">
<a href="/blog/2016/07/23/internet-of-things-data-exploration-with-jupyter-notebooks/">IoT Data Exploration with Jupyter Notebooks</a>
</li>
@ -249,12 +255,6 @@ $ hass --script db_migrator --config /path/to/config
</li>
<li class="post">
<a href="/blog/2016/07/01/envisalink-homematic-hdmi-cec-and-sony-bravia-tv/">0.23: Envisalink, Homematic, HDMI-CEC and Sony Bravia TV</a>
</li>
</ul>
</section>

12
blog/2016/07/19/visualizing-your-iot-data/index.html
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@ -288,6 +288,12 @@ plt.savefig(<span class="string"><span class="delimiter">'</span><span class="co
<ul class="divided">
<li class="post">
<a href="/blog/2016/07/28/esp8266-and-micropython-part1/">ESP8266 and MicroPython - Part 1</a>
</li>
<li class="post">
<a href="/blog/2016/07/23/internet-of-things-data-exploration-with-jupyter-notebooks/">IoT Data Exploration with Jupyter Notebooks</a>
</li>
@ -307,12 +313,6 @@ plt.savefig(<span class="string"><span class="delimiter">'</span><span class="co
</li>
<li class="post">
<a href="/blog/2016/07/01/envisalink-homematic-hdmi-cec-and-sony-bravia-tv/">0.23: Envisalink, Homematic, HDMI-CEC and Sony Bravia TV</a>
</li>
</ul>
</section>

12
blog/2016/07/23/internet-of-things-data-exploration-with-jupyter-notebooks/index.html
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@ -245,6 +245,12 @@ One of the graphs created with this tutorial.
<ul class="divided">
<li class="post">
<a href="/blog/2016/07/28/esp8266-and-micropython-part1/">ESP8266 and MicroPython - Part 1</a>
</li>
<li class="post">
@ -264,12 +270,6 @@ One of the graphs created with this tutorial.
</li>
<li class="post">
<a href="/blog/2016/07/01/envisalink-homematic-hdmi-cec-and-sony-bravia-tv/">0.23: Envisalink, Homematic, HDMI-CEC and Sony Bravia TV</a>
</li>
</ul>
</section>

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<h1 class="title indent">ESP8266 and MicroPython - Part 1</h1>
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<time datetime="2016-07-28T04:00:00+00:00" pubdate data-updated="true"><i class="icon-calendar"></i> July 28, 2016</time>
<span class="byline author vcard"><i class='icon-user'></i> Fabian Affolter</span>
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<p><img src="/images/blog/2016-07-micropython/micropython.png" style="clear: right; border:none; box-shadow: none; float: right; margin-bottom: 12px;" width="200" /><br />
The first release of Micropython for ESP8266 was delivered a couple of weeks ago. The <a href="http://docs.micropython.org/en/latest/esp8266/esp8266_contents.html">documentation</a> covers a lot of ground. This post is providing only a little summary which should get you started.</p>
<p>Until a couple of weeks ago, the pre-built MicroPython binary for the ESP8266 was only available to backers. This has changed now and it is available to the public for <a href="https://micropython.org/download/#esp8266">download</a>.</p>
<a name="read-more"></a>
<p>The easiest way is to use <a href="https://github.com/themadinventor/esptool">esptool.py</a> for firmware handling tasks. First erase the flash:</p>
<div class="highlighter-coderay"><div class="CodeRay">
<div class="code"><pre>$ sudo python esptool.py --port /dev/ttyUSB0 erase_flash
esptool.py v1.0.2-dev
Connecting...
Erasing flash (this may take a while)...
</pre></div>
</div>
</div>
<p>and then load the firmware. You may adjust the file name of the firmware binary.</p>
<div class="highlighter-coderay"><div class="CodeRay">
<div class="code"><pre>$ sudo python esptool.py --port /dev/ttyUSB0 --baud 460800 write_flash --flash_size=8m 0 esp8266-2016-07-10-v1.8.2.bin
esptool.py v1.2-dev
Connecting...
Running Cesanta flasher stub...
Flash params set to 0x0020
Writing 540672 @ 0x0... 540672 (100 %)
Wrote 540672 bytes at 0x0 in 13.1 seconds (330.8 kbit/s)...
Leaving...
</pre></div>
</div>
</div>
<p>Now reset the device. You should then be able to use the <a href="http://docs.micropython.org/en/latest/esp8266/esp8266/tutorial/repl.html#getting-a-micropython-repl-prompt">REPL (Read Evaluate Print Loop)</a>. On Linux there is <code>minicom</code> or <code>picocom</code>, on a Mac you can use <code>screen</code> (eg. <code>screen /dev/tty.SLAB_USBtoUART 115200</code>), and on Windows there is Putty to open a serial connection and get the REPL prompt.</p>
<p>The <a href="http://docs.micropython.org/en/latest/esp8266/esp8266/tutorial/repl.html#webrepl-a-prompt-over-wifi">WebREPL</a> work over a wireless connection and allows easy access to a prompt in your browser. An instance of the WebREPL client is hosted at <a href="http://micropython.org/webrepl">http://micropython.org/webrepl</a>. Alternatively, you can create a local clone of their <a href="https://github.com/micropython/webrepl">GitHub repository</a>. This is neccessary if your want to use the command-line tool <code>webrepl_cli.py</code> which is mentionend later in this post.</p>
<div class="highlighter-coderay"><div class="CodeRay">
<div class="code"><pre>$ sudo minicom -D /dev/ttyUSB0
#4 ets_task(4020e374, 29, 3fff70e8, 10)
WebREPL daemon started on ws://192.168.4.1:8266
Started webrepl in setup mode
could not open file 'main.py' for reading
#5 ets_task(4010035c, 3, 3fff6360, 4)
MicroPython v1.8.2-9-g805c2b9 on 2016-07-10; ESP module with ESP8266
Type &quot;help()&quot; for more information.
&gt;&gt;&gt;
</pre></div>
</div>
</div>
<p class="note">
The public build of the firmware may be different than the firmware distributed to the backers of the campaign. Especially in regard of the <a href="http://docs.micropython.org/en/latest/esp8266/py-modindex.html">available modules</a>, turned on debug messages, and alike. Also, the WebREPL may not be started by default.
</p>
<p>Connect a LED to pin 5 (or another pin of your choosing) to check if the ESP8266 is working as expected.</p>
<div class="highlighter-coderay"><div class="CodeRay">
<div class="code"><pre>&gt;&gt;&gt; <span class="keyword">import</span> <span class="include">machine</span>
&gt;&gt;&gt; pin = machine.Pin(<span class="integer">5</span>, machine.Pin.OUT)
&gt;&gt;&gt; pin.high()
</pre></div>
</div>
</div>
<p>You can toogle the LED by changing its state with <code>pin.high()</code> and <code>pin.low()</code>.</p>
<p>Various ESP8266 development board are shipped with an onboard photocell or a light dependent resistors (LDR) connected to the analog pin of your ESP8266 check if you are able to obtain a value.</p>
<div class="highlighter-coderay"><div class="CodeRay">
<div class="code"><pre>&gt;&gt;&gt; <span class="keyword">import</span> <span class="include">machine</span>
&gt;&gt;&gt; brightness = machine.ADC(<span class="integer">0</span>)
&gt;&gt;&gt; brightness.read()
</pre></div>
</div>
</div>
<p>Make sure that you are familiar with REPL and WebREPL because this will be needed soon. Keep in mind the password for the WebREPL access.</p>
<p>Read the <a href="http://docs.micropython.org/en/latest/esp8266/esp8266/tutorial/network_basics.html">instructions</a> about how to setup your wireless connection. Basically you need to upload a <code>boot.py</code> file to the microcontroller and this file is taking care of the connection setup. Below you find a sample which is more or less the same as shown in the <a href="http://docs.micropython.org/en/latest/esp8266/esp8266/tutorial/network_basics.html#configuration-of-the-wifi">documentation</a>.</p>
<div class="highlighter-coderay"><div class="CodeRay">
<div class="code"><pre><span class="keyword">def</span> <span class="function">do_connect</span>():
<span class="keyword">import</span> <span class="include">network</span>
SSID = <span class="string"><span class="delimiter">'</span><span class="content">SSID</span><span class="delimiter">'</span></span>
PASSWORD = <span class="string"><span class="delimiter">'</span><span class="content">PASSWORD</span><span class="delimiter">'</span></span>
sta_if = network.WLAN(network.STA_IF)
ap_if = network.WLAN(network.AP_IF)
<span class="keyword">if</span> ap_if.active():
ap_if.active(<span class="predefined-constant">False</span>)
<span class="keyword">if</span> <span class="keyword">not</span> sta_if.isconnected():
print(<span class="string"><span class="delimiter">'</span><span class="content">connecting to network...</span><span class="delimiter">'</span></span>)
sta_if.active(<span class="predefined-constant">True</span>)
sta_if.connect(SSID, PASSWORD)
<span class="keyword">while</span> <span class="keyword">not</span> sta_if.isconnected():
<span class="keyword">pass</span>
print(<span class="string"><span class="delimiter">'</span><span class="content">Network configuration:</span><span class="delimiter">'</span></span>, sta_if.ifconfig())
</pre></div>
</div>
</div>
<p>Upload this file with <code>webrepl_cli.py</code> or the WebREPL:</p>
<div class="highlighter-coderay"><div class="CodeRay">
<div class="code"><pre>$ python webrepl_cli.py boot.py 192.168.4.1:/boot.py
</pre></div>
</div>
</div>
<p>If you reboot, you should see your current IP address in the terminal.</p>
<div class="highlighter-coderay"><div class="CodeRay">
<div class="code"><pre>&gt;&gt;&gt; Network configuration: ('192.168.0.10', '255.255.255.0', '192.168.0.1', '192.168.0.1')
</pre></div>
</div>
</div>
<p>First let’s create a little consumer for Home Assistant sensor’s state. The code to place in <code>main.py</code> is a mixture of code from above and the <a href="/developers/rest_api/">RESTful API</a> of Home Assistant. If the temperature in the kitchen is higher than 20 °C then the LED connected to pin 5 is switched on.</p>
<p class="note">
If a module is missing then you need to download is it from <a href="https://github.com/micropython/micropython-lib">MicroPython Library overview</a> and upload it to the ESP8266 with <code>webrepl_cli.py</code> manually.
</p>
<div class="highlighter-coderay"><div class="CodeRay">
<div class="code"><pre><span class="comment"># Sample code to request the state of a Home Assistant entity.</span>
API_PASSWORD = <span class="string"><span class="delimiter">'</span><span class="content">YOUR_PASSWORD</span><span class="delimiter">'</span></span>
URL = <span class="string"><span class="delimiter">'</span><span class="content">http://10.100.0.197:8123/api/states/</span><span class="delimiter">'</span></span>
ENTITY = <span class="string"><span class="delimiter">'</span><span class="content">sensor.kitchen_temperature</span><span class="delimiter">'</span></span>
TIMEOUT = <span class="integer">30</span>
PIN = <span class="integer">5</span>
<span class="keyword">def</span> <span class="function">get_data</span>():
<span class="keyword">import</span> <span class="include">urequests</span>
url = <span class="string"><span class="delimiter">'</span><span class="content">{}{}</span><span class="delimiter">'</span></span>.format(URL, ENTITY)
headers = {<span class="string"><span class="delimiter">'</span><span class="content">x-ha-access</span><span class="delimiter">'</span></span>: API_PASSWORD,
<span class="string"><span class="delimiter">'</span><span class="content">content-type</span><span class="delimiter">'</span></span>: <span class="string"><span class="delimiter">'</span><span class="content">application/json</span><span class="delimiter">'</span></span>}
resp = urequests.get(URL, headers=headers)
<span class="keyword">return</span> resp.json()[<span class="string"><span class="delimiter">'</span><span class="content">state</span><span class="delimiter">'</span></span>]
<span class="keyword">def</span> <span class="function">main</span>():
<span class="keyword">import</span> <span class="include">machine</span>
<span class="keyword">import</span> <span class="include">time</span>
pin = machine.Pin(PIN, machine.Pin.OUT)
<span class="keyword">while</span> <span class="predefined-constant">True</span>:
<span class="keyword">try</span>:
<span class="keyword">if</span> <span class="predefined">int</span>(get_data()) &gt;= <span class="integer">20</span>:
pin.high()
<span class="keyword">else</span>:
pin.low()
<span class="keyword">except</span> <span class="exception">TypeError</span>:
<span class="keyword">pass</span>
time.sleep(TIMEOUT)
<span class="keyword">if</span> __name__ == <span class="string"><span class="delimiter">'</span><span class="content">__main__</span><span class="delimiter">'</span></span>:
print(<span class="string"><span class="delimiter">'</span><span class="content">Get the state of {}</span><span class="delimiter">'</span></span>.format(ENTITY))
main()
</pre></div>
</div>
</div>
<p>Upload <code>main.py</code> the same way as <code>boot.py</code>. After a reboot (<code>&gt;&gt;&gt; import machine</code> and <code>&gt;&gt;&gt; machine.reboot()</code>) or power-cycling your physical notifier is ready.</p>
<p>If you run into trouble, press “Ctrl+c” in the REPL to stop the execution of the code, enter <code>&gt;&gt;&gt; import webrepl</code> and <code>&gt;&gt;&gt; webrepl.start()</code>, and upload your fixed file.</p>
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<a href="/blog/2016/07/16/sqlalchemy-knx-join-simplisafe/">0.24: SQLAlchemy, KNX, Join by Joaoapps, and SimpliSafe.</a>
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<a href="/blog/2016/07/06/pocketchip-running-home-assistant/">PocketCHIP running Home Assistant</a>
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