{"id":4554,"date":"2020-06-04T10:09:38","date_gmt":"2020-06-04T10:09:38","guid":{"rendered":"https:\/\/grodansparadis.com\/wordpress\/?p=4554"},"modified":"2020-06-04T10:09:54","modified_gmt":"2020-06-04T10:09:54","slug":"node-red-vscp-pir-door-sensors-howto","status":"publish","type":"post","link":"https:\/\/grodansparadis.com\/wordpress\/?p=4554","title":{"rendered":"#node-red + #VSCP + PIR + door sensors howto"},"content":{"rendered":"\n
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In a previous howto (Getting started with node-red-contrib-vscp<\/a>) we were looking at how to display temperature data from VSCP modules in node-red. In this howto we will look at the same hardware setup but concentrate on output from one module in the setup, the CAN4VSCP Beijing<\/a> module.<\/p>\n\n\n\n

Beijing is a general I\/O module which in this setup is used to detect input from three PIR sensors and three magnetic door sensors. The inputs are currently used like this<\/p>\n\n\n\n

0<\/strong><\/td>Magnetic door sensor office door.<\/td><\/tr>
1<\/strong><\/td>Magnetic door sensor cellar door.<\/td><\/tr>
2<\/strong><\/td>Magnetic door sensor main entrance door.<\/td><\/tr>
3<\/strong><\/td>Unused.<\/td><\/tr>
4<\/strong><\/td>PIR sensor cellar.<\/td><\/tr>
5<\/strong><\/td>PIR sensor main entrance.<\/td><\/tr>
6<\/strong><\/td>Unused.<\/td><\/tr>
7<\/strong><\/td>PIR sensor inside of office door.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

The Beijing module will send a CLASS1.INFORMATION, Type=ON<\/a>\/OFF<\/a> event when any of the sensors are activated. The data for the events are defined as follows<\/p>\n\n\n\n

Data byte<\/th>Description<\/th><\/tr><\/thead>
0<\/td>index. Often used as an index for channels within a module.<\/td><\/tr>
1<\/td>Zone for which event applies to (0-255). 255 is all zones.<\/td><\/tr>
2<\/td>Sub-zone for which event applies to (0-255). 255 is all sub-zones.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

The index byte ( byte 0) will this contain the index for the PIR or switch as of above. Zone and subzone is used to indicate the sensors position and here I use bits 7,6,5 of the zone to indicate the floor (1 in this case) and the rest of the bits are set to the room number on that floor (2 in this case). Zone is therefore set to 0b00100010 = 0x22 = 34. Subzones are set to the same as the sensor index. Any schema of your own preference can be used for this. It is entirely up to the user.<\/p>\n\n\n\n

The Beijing module is set to nickname id = 1. This is important as we need to filter on this nickname in case more PIR’s\/switches are added in the future.<\/p>\n\n\n\n

So as an example. If the main door is opened a CLASS1.INFORMATION, Type=ON (3)<\/a> event will be sent and when it is closed again a CLASS1.INFORMATION, Type=OFF (4)<\/a> event will be sent. The data will in both cases be<\/p>\n\n\n\n