How do I make an rotary encoder work properly in node red? I have multiple inputs and I want to control them using an encoder, any ideias? [image]

[image] Colin: how is the encoder connected to your computer? You have not answered that question.

So the GND Is conected to GND (pin 9) The + is conected to 3.3V (Pin 1) The DT is conected to GPIO17 (pin 11) And the CLK Is conected to GPIO 18 (pin 12)

Do you have some software that allows you to determine the position, or some algorithm that has to be used to determine it? If it is designed for a pi it probably comes with some s/w.

No I dont have a software that allows that, and yes it comes with an SW but I didnt conect it to anything

I just connected the encoder to the pi, Im not using anything besides the pi, de encoder and of course the node red

This thread might help [image] KY040 rotary encoder - counting within NR General Hello Colin - Sorry I didn't mention the stepper motor node - it was an afterthought. Anyway I'm pleased to say that the node pythonshell and a neat little piece of python code (https://www.raspberrypi.org/forums/viewtopic.php?t=140250) has solved my problem. I now have the rotary encoder connected directly to the Raspberry Pi with a limit of 0-100 (perfect for PWM control on a rpi_gpio_out node. I appreciate your suggestions and will see if I can make that a more suitable solution. Rod

Just for as an exercise - I've come up with this flow - try connecting your DT/CLK signals to the two inputs and see if it give any sensible results at all. Put CLK signal into top input [image] [{"id":"4cc4dd5a.e99f44","type":"switch","z":"dfaf687e.30fb88","name":"","property":"payload.DT","propertyType":"msg","rules":[{"t":"eq","v":"1","vt":"str"},{"t":"eq","v":"0","vt":"str"}],"checkall":"true","repair":false,"outputs":2,"x":650,"y":360,"wires":[["a10eb221.01cba"],["b8eb77db.d1e298"]]}] I don't have any encoders to check it with but it seems to work for slow moving test signals

thank you, Ill try It when I have the time to

I found an encoder and it works - updated flow with Pi GPIO nodes added [image] [{"id":"403ca135.8773f","type":"debug","z":"dfaf687e.30fb88","name":"FINAL","active":false,"tosidebar":true,"console":false,"tostatus":true,"complete":"true","targetType":"full","statusVal":"payload","statusType":"auto","x":990,"y":220,"wires":[]},{"id":"2ea6c228.7792fe","type":"join","z":"dfaf687e.30fb88","name":"","mode":"custom","build":"object","property":"payload","propertyType":"msg","key":"topic","joiner":"\\n","joinerType":"str","accumulate":true,"timeout":"","count":"1","reduceRight":false,"reduceExp":"","reduceInit":"","reduceInitType":"","reduceFixup":"","x":290,"y":320,"wires":[["c01e7353.5da95"]]},{"id":"384137a2.28f1d8","type":"change","z":"dfaf687e.30fb88","name":"","rules":[{"t":"set","p":"CLKedge","pt":"msg","to":"true","tot":"bool"},{"t":"set","p":"topic","pt":"msg","to":"CLK","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":220,"y":260,"wires":[["2ea6c228.7792fe","2b6b0070.b21a3"]]},{"id":"c01e7353.5da95","type":"switch","z":"dfaf687e.30fb88","name":"","property":"CLKedge","propertyType":"msg","rules":[{"t":"true"}],"checkall":"true","repair":false,"outputs":1,"x":410,"y":320,"wires":[["5a7e456.9ff69bc"]]},{"id":"4ef1f45d.febfec","type":"change","z":"dfaf687e.30fb88","name":"","rules":[{"t":"set","p":"CLKedge","pt":"msg","to":"false","tot":"bool"},{"t":"set","p":"topic","pt":"msg","to":"DT","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":240,"y":380,"wires":[["2ea6c228.7792fe","c7fd0442.1b4e18"]]},{"id":"5a7e456.9ff69bc","type":"switch","z":"dfaf687e.30fb88","name":"","property":"payload.CLK","propertyType":"msg","rules":[{"t":"eq","v":"0","vt":"str"},{"t":"else"}],"checkall":"true","repair":false,"outputs":2,"x":530,"y":320,"wires":[["c6969808.7e6a78"],["4cc4dd5a.e99f44"]]},{"id":"c6969808.7e6a78","type":"switch","z":"dfaf687e.30fb88","name":"","property":"payload.DT","propertyType":"msg","rules":[{"t":"eq","v":"1","vt":"str"},{"t":"eq","v":"0","vt":"str"}],"checkall":"true","repair":false,"outputs":2,"x":650,"y":300,"wires":[["bdba459a.564768"],["dde61eeb.26b8f"]]},{"id":"4cc4dd5a.e99f44","type":"switch","z":"dfaf687e.30fb88","name":"","property":"payload.DT","propertyType":"msg","rules":[{"t":"eq","v":"1","vt":"str"},{"t":"eq","v":"0","vt":"str"}],"checkall":"true","repair":false,"outputs":2,"x":650,"y":360,"wires":[["a10eb221.01cba"],["b8eb77db.d1e298"]]},{"id":"bdba459a.564768","type":"change","z":"dfaf687e.30fb88","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"clockwise","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":820,"y":280,"wires":[["cc6d6356.1c6e9"]]},{"id":"dde61eeb.26b8f","type":"change","z":"dfaf687e.30fb88","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"anti-clockwise","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":820,"y":320,"wires":[["cc6d6356.1c6e9"]]},{"id":"b8eb77db.d1e298","type":"change","z":"dfaf687e.30fb88","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"clockwise","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":820,"y":400,"wires":[["cc6d6356.1c6e9"]]},{"id":"a10eb221.01cba","type":"change","z":"dfaf687e.30fb88","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"anti-clockwise","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":820,"y":360,"wires":[["cc6d6356.1c6e9"]]},{"id":"2b6b0070.b21a3","type":"debug","z":"dfaf687e.30fb88","name":"","active":false,"tosidebar":true,"console":false,"tostatus":true,"complete":"true","targetType":"full","statusVal":"payload","statusType":"auto","x":380,"y":260,"wires":[]},{"id":"c7fd0442.1b4e18","type":"debug","z":"dfaf687e.30fb88","name":"","active":false,"tosidebar":true,"console":false,"tostatus":true,"complete":"true","targetType":"full","statusVal":"payload","statusType":"auto","x":400,"y":400,"wires":[]},{"id":"9d91be0c.c74c1","type":"rpi-gpio in","z":"dfaf687e.30fb88","name":"","pin":"8","intype":"tri","debounce":"0","read":true,"x":70,"y":260,"wires":[["384137a2.28f1d8"]]},{"id":"b58534f2.fb09e8","type":"rpi-gpio in","z":"dfaf687e.30fb88","name":"","pin":"10","intype":"tri","debounce":"0","read":true,"x":70,"y":380,"wires":[["4ef1f45d.febfec"]]},{"id":"bbd4af0c.aef2c","type":"debug","z":"dfaf687e.30fb88","name":"STATUS","active":true,"tosidebar":true,"console":false,"tostatus":true,"complete":"payload","targetType":"msg","statusVal":"payload","statusType":"auto","x":1020,"y":400,"wires":[]},{"id":"cc6d6356.1c6e9","type":"function","z":"dfaf687e.30fb88","name":"","func":"\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":975,"y":320,"wires":[["403ca135.8773f","bbd4af0c.aef2c"]],"l":false},{"id":"e5ecb697.26c048","type":"comment","z":"dfaf687e.30fb88","name":"CLK","info":"","x":190,"y":220,"wires":[]},{"id":"3cf589.899efa78","type":"comment","z":"dfaf687e.30fb88","name":"DT","info":"","x":190,"y":420,"wires":[]}]

More compact version using a function node [image] [{"id":"2c40d42d.176cbc","type":"debug","z":"dfaf687e.30fb88","name":"STATUS_FUNCTION","active":true,"tosidebar":true,"console":false,"tostatus":true,"complete":"payload","targetType":"msg","statusVal":"payload","statusType":"auto","x":680,"y":540,"wires":[]},{"id":"e2775f3d.af2bd","type":"change","z":"dfaf687e.30fb88","name":"","rules":[{"t":"set","p":"topic","pt":"msg","to":"CLK","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":290,"y":500,"wires":[["c4b142c4.477fe"]]},{"id":"27e7e692.0d532a","type":"change","z":"dfaf687e.30fb88","name":"","rules":[{"t":"set","p":"topic","pt":"msg","to":"DT","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":290,"y":580,"wires":[["c4b142c4.477fe"]]},{"id":"c4b142c4.477fe","type":"function","z":"dfaf687e.30fb88","name":"","func":"var CLK;\n\n\nif ((msg['topic']) == 'CLK') {\n CLK = (msg['payload']);\n if (context.keys().includes('DT')) {\n if (CLK != (context.get('DT'))) {\n msg['payload'] = 'clockwise';\n } else {\n msg['payload'] = 'anti-clockwise';\n }\n return msg;\n }\n} else {\n context.set('DT', (msg['payload']));\n}","outputs":1,"noerr":0,"initialize":"","finalize":"","x":460,"y":540,"wires":[["2c40d42d.176cbc"]]},{"id":"1531b07b.ff934","type":"comment","z":"dfaf687e.30fb88","name":"CLK","info":"","x":270,"y":460,"wires":[]},{"id":"9aa49914.0e8cd8","type":"comment","z":"dfaf687e.30fb88","name":"DT","info":"","x":270,"y":620,"wires":[]},{"id":"a8fe264f.2d9368","type":"rpi-gpio in","z":"dfaf687e.30fb88","name":"","pin":"8","intype":"tri","debounce":"0","read":true,"x":90,"y":500,"wires":[["e2775f3d.af2bd"]]},{"id":"2a16462.f4e30ba","type":"rpi-gpio in","z":"dfaf687e.30fb88","name":"","pin":"10","intype":"tri","debounce":"0","read":true,"x":90,"y":580,"wires":[["27e7e692.0d532a"]]}]

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Using rotary encoder

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cymplecy 9 July 2020 12:54 9

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Using rotary encoder

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