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Cheapest ever 433 Mhz transceiver for PCs - Revision history
2024-03-28T14:01:42Z
Revision history for this page on the wiki
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Danny at 20:23, 6 September 2016
2016-09-06T20:23:25Z
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 20:23, 6 September 2016</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:433 switch 1.JPG|thumb|200px]]</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:433 switch 1.JPG|thumb|200px]]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Several shops offer cheap 433Mhz RF remote controlled switches. These are nice, but they introduce a few problems as well:</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Several shops offer cheap 433Mhz RF remote controlled switches. These are nice, but they introduce a few problems as well:</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* The cheap ones all have different remote controls, using different protocols;</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* The cheap ones all have different remote controls, using different protocols<ins class="diffchange diffchange-inline">, leading to our own [https://mondaynote.com/internet-of-things-the-basket-of-remotes-problem-f80922a91a0f basket of remotes problem]</ins>;</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* We want to control our light switches from our PC, not from the remote controls.</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* We <ins class="diffchange diffchange-inline">often </ins>want to control our light switches from our PC, not from the remote controls.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>What if you could use a PC to transmit all the RF signals to switch on- and off all devices, and have that PC learn the signals from the remotes? As it turns out, this is very easy to do. Most of these remote control devices use a digital serial protocol of about 1kbaud superimposed on the 433 Mhz signal. That 1kbaud falls well within the range of what a PC sound card can generate or sample. Furthermore, receivers that extract the digital signal and transmitters that turn the digitial signals into an RF signal are readily available.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>What if you could use a PC to transmit all the RF signals to switch on- and off all devices, and have that PC learn the signals from the remotes? As it turns out, this is very easy to do. Most of these remote control devices use a digital serial protocol of about 1kbaud superimposed on the 433 Mhz signal. That 1kbaud falls well within the range of what a PC sound card can generate or sample. Furthermore, receivers that extract the digital signal and transmitters that turn the digitial signals into an RF signal are readily available.</div></td></tr>
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Danny
https://rurandom.org/justintime/index.php?title=Cheapest_ever_433_Mhz_transceiver_for_PCs&diff=1696&oldid=prev
Danny at 23:55, 21 July 2015
2015-07-21T23:55:13Z
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 23:55, 21 July 2015</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l7" >Line 7:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>This page describes how to create an absurdly low-cost USB 433 Mhz transceiver that can serve as a good starting point for your home automation projects.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>This page describes how to create an absurdly low-cost USB 433 Mhz transceiver that can serve as a good starting point for your home automation projects.</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">We're also working on an [[AVR controlled RF light switches|AVR ("arduino") based version]] that transmits cleaner signals.</ins></div></td></tr>
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Danny
https://rurandom.org/justintime/index.php?title=Cheapest_ever_433_Mhz_transceiver_for_PCs&diff=1686&oldid=prev
Danny at 22:30, 21 July 2015
2015-07-21T22:30:32Z
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 22:30, 21 July 2015</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l75" >Line 75:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>{{ShowComments|show=True}}</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>{{ShowComments|show=True}}</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:433Mhz]]</ins></div></td></tr>
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Danny
https://rurandom.org/justintime/index.php?title=Cheapest_ever_433_Mhz_transceiver_for_PCs&diff=1670&oldid=prev
Danny: /* Comments? Questions? */
2015-02-25T21:57:37Z
<p><span dir="auto"><span class="autocomment">Comments? Questions?</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 21:57, 25 February 2015</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l74" >Line 74:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Comments? Questions?==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Comments? Questions?==</div></td></tr>
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Danny
https://rurandom.org/justintime/index.php?title=Cheapest_ever_433_Mhz_transceiver_for_PCs&diff=1647&oldid=prev
Danny: /* Comments? Questions? */
2015-02-25T19:07:18Z
<p><span dir="auto"><span class="autocomment">Comments? Questions?</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 19:07, 25 February 2015</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l74" >Line 74:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Comments? Questions?==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Comments? Questions?==</div></td></tr>
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Danny
https://rurandom.org/justintime/index.php?title=Cheapest_ever_433_Mhz_transceiver_for_PCs&diff=1617&oldid=prev
Danny: /* Hardware */
2015-01-12T17:52:57Z
<p><span dir="auto"><span class="autocomment">Hardware</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 17:52, 12 January 2015</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l12" >Line 12:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Hardware==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Hardware==</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Before you read any further: the hardware described below is really a very dirty hack and users have reported problems with noise on the input of this device. A more thought-through piece of hardware that does essentially the same thing is described on [http://www.tablix.org/~avian/blog/archives/2011/10/receiver_module_follow_up/ <del class="diffchange diffchange-inline">Avions </del>blog] (thanks for your comment Avian). You could first try the hack described below, and if that doesn't work consider Avians approach...</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Before you read any further: the hardware described below is really a very dirty hack and users have reported problems with noise on the input of this device. A more thought-through piece of hardware that does essentially the same thing is described on [http://www.tablix.org/~avian/blog/archives/2011/10/receiver_module_follow_up/ <ins class="diffchange diffchange-inline">Avians </ins>blog] (thanks for your comment Avian). You could first try the hack described below, and if that doesn't work consider Avians approach...</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To build this, all you need is a [http://www.ebay.com/sch/i.html?_nkw=433+transmitter&_sop=15&LH_BIN=1 433Mhz transmitter/receiver pair] (or [http://www.ebay.com/sch/i.html?_nkw=315+transmitter&_sop=15&LH_BIN=1 315 Mhz] if appropriate in your country) and a [http://www.ebay.com/sch/i.html?_nkw=usb+adapter+sound+card&_sop=15&LH_BIN=1 usb audio-"card"] (links are to ebay search results). All in all, with the ever decreasing prices for these devices this is about $2,- in materials. Now give yourself a dollar for the soldering work that is about to happen.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To build this, all you need is a [http://www.ebay.com/sch/i.html?_nkw=433+transmitter&_sop=15&LH_BIN=1 433Mhz transmitter/receiver pair] (or [http://www.ebay.com/sch/i.html?_nkw=315+transmitter&_sop=15&LH_BIN=1 315 Mhz] if appropriate in your country) and a [http://www.ebay.com/sch/i.html?_nkw=usb+adapter+sound+card&_sop=15&LH_BIN=1 usb audio-"card"] (links are to ebay search results). All in all, with the ever decreasing prices for these devices this is about $2,- in materials. Now give yourself a dollar for the soldering work that is about to happen.</div></td></tr>
</table>
Danny
https://rurandom.org/justintime/index.php?title=Cheapest_ever_433_Mhz_transceiver_for_PCs&diff=1547&oldid=prev
Danny at 09:09, 6 November 2014
2014-11-06T09:09:56Z
<p></p>
<table class="diff diff-contentalign-left diff-editfont-monospace" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="en">
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 09:09, 6 November 2014</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l8" >Line 8:</td>
<td colspan="2" class="diff-lineno">Line 8:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>This page describes how to create an absurdly low-cost USB 433 Mhz transceiver that can serve as a good starting point for your home automation projects.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>This page describes how to create an absurdly low-cost USB 433 Mhz transceiver that can serve as a good starting point for your home automation projects.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><br style="clear:both"></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><br style="clear:both"></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">{{#ev:youtube|bvmZMwuyOAU|200|right}}</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Hardware==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Hardware==</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
</table>
Danny
https://rurandom.org/justintime/index.php?title=Cheapest_ever_433_Mhz_transceiver_for_PCs&diff=1541&oldid=prev
Danny: /* Hardware */
2014-10-17T15:41:24Z
<p><span dir="auto"><span class="autocomment">Hardware</span></span></p>
<table class="diff diff-contentalign-left diff-editfont-monospace" data-mw="interface">
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<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="en">
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 15:41, 17 October 2014</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l9" >Line 9:</td>
<td colspan="2" class="diff-lineno">Line 9:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><br style="clear:both"></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><br style="clear:both"></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Hardware==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Hardware==</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">Before you read any further: the hardware described below is really a very dirty hack and users have reported problems with noise on the input of this device. A more thought-through piece of hardware that does essentially the same thing is described on [http://www.tablix.org/~avian/blog/archives/2011/10/receiver_module_follow_up/ Avions blog] (thanks for your comment Avian). You could first try the hack described below, and if that doesn't work consider Avians approach...</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To build this, all you need is a [http://www.ebay.com/sch/i.html?_nkw=433+transmitter&_sop=15&LH_BIN=1 433Mhz transmitter/receiver pair] (or [http://www.ebay.com/sch/i.html?_nkw=315+transmitter&_sop=15&LH_BIN=1 315 Mhz] if appropriate in your country) and a [http://www.ebay.com/sch/i.html?_nkw=usb+adapter+sound+card&_sop=15&LH_BIN=1 usb audio-"card"] (links are to ebay search results). All in all, with the ever decreasing prices for these devices this is about $2,- in materials. Now give yourself a dollar for the soldering work that is about to happen.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To build this, all you need is a [http://www.ebay.com/sch/i.html?_nkw=433+transmitter&_sop=15&LH_BIN=1 433Mhz transmitter/receiver pair] (or [http://www.ebay.com/sch/i.html?_nkw=315+transmitter&_sop=15&LH_BIN=1 315 Mhz] if appropriate in your country) and a [http://www.ebay.com/sch/i.html?_nkw=usb+adapter+sound+card&_sop=15&LH_BIN=1 usb audio-"card"] (links are to ebay search results). All in all, with the ever decreasing prices for these devices this is about $2,- in materials. Now give yourself a dollar for the soldering work that is about to happen.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
</table>
Danny
https://rurandom.org/justintime/index.php?title=Cheapest_ever_433_Mhz_transceiver_for_PCs&diff=1490&oldid=prev
Danny: /* Quick-'n-easy */
2014-07-23T00:36:36Z
<p><span dir="auto"><span class="autocomment">Quick-'n-easy</span></span></p>
<table class="diff diff-contentalign-left diff-editfont-monospace" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="en">
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 00:36, 23 July 2014</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l47" >Line 47:</td>
<td colspan="2" class="diff-lineno">Line 47:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Quick-'n-easy===</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Quick-'n-easy===</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>If you don't like to spend time on configuring existing home automation software and just want to switch something from a command line or script, you only need a command line audio player that is capable to play your sounds to a given audio card. On Windows, vlc might work (I haven't tried). On linux, ''aplay'' fits the bill exactly. In your script, call aplay with the name of the keystroke-file and specify the soundcard, e.g.:</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>If you don't like to spend time on configuring existing home automation software and just want to switch something from a command line or script, you only need a command line audio player that is capable to play your sounds to a given audio card. On Windows, vlc might work (I haven't tried). On linux <ins class="diffchange diffchange-inline">with ALSA installed</ins>, ''aplay'' fits the bill exactly. In your script, call aplay with the name of the keystroke-file and specify the soundcard, e.g.:</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> aplay -D plughw:2,0 onA.wav; </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> aplay -D plughw:2,0 onA.wav; </div></td></tr>
</table>
Danny
https://rurandom.org/justintime/index.php?title=Cheapest_ever_433_Mhz_transceiver_for_PCs&diff=1489&oldid=prev
Danny at 22:40, 22 July 2014
2014-07-22T22:40:07Z
<p></p>
<table class="diff diff-contentalign-left diff-editfont-monospace" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="en">
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 22:40, 22 July 2014</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l44" >Line 44:</td>
<td colspan="2" class="diff-lineno">Line 44:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>I use [http://audacity.sourceforge.net/ Audacity] to record keystrokes on the remote. It's as easy as pressing the ''Record''-button in Audacity, pressing the key that we want to record on the remote and then pressing the stop button. You should see that Audacity has recorded a few repetitions of the same sequence&mdash;the image above zooms in on two such repetitions. You can now verify that the signal was correctly recorded by playing it back to our contraption. The switch should behave as if you pressed the key on the remote. Playing back only one occurrence of such a sequence usually doesn't work, so I try to find the minimum amount of repetitions that reproduce the switching behaviour. Then I save those repetitions in a single wav-file. Now repeat the procedure for the other keys of a remote and create a wav-file for each key. You should end up with wav-files with names like ''onA.wav'', ''offA.wav'', ''onB.wav'', etc.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>I use [http://audacity.sourceforge.net/ Audacity] to record keystrokes on the remote. It's as easy as pressing the ''Record''-button in Audacity, pressing the key that we want to record on the remote and then pressing the stop button. You should see that Audacity has recorded a few repetitions of the same sequence&mdash;the image above zooms in on two such repetitions. You can now verify that the signal was correctly recorded by playing it back to our contraption. The switch should behave as if you pressed the key on the remote. Playing back only one occurrence of such a sequence usually doesn't work, so I try to find the minimum amount of repetitions that reproduce the switching behaviour. Then I save those repetitions in a single wav-file. Now repeat the procedure for the other keys of a remote and create a wav-file for each key. You should end up with wav-files with names like ''onA.wav'', ''offA.wav'', ''onB.wav'', etc.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">{{#ev:youtube|H3BO2Uw0yfQ|480}}</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Quick-'n-easy===</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Quick-'n-easy===</div></td></tr>
</table>
Danny