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Add better error handling and update Compass

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Nick O'Leary
2016-03-06 21:54:30 +00:00
parent 53c9c834b9
commit d5446ee117
3 changed files with 42 additions and 27 deletions
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hardware/sensehat/examples/Compass.json
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@@ -1 +1 @@
[{"id":"8a52215e.75ade","type":"rpi-sensehat out","z":"ec37e354.13c82","name":"","x":460,"y":39,"wires":[]},{"id":"f0e76645.0f1898","type":"rpi-sensehat in","z":"ec37e354.13c82","name":"","motion":true,"env":false,"stick":false,"x":90,"y":39,"wires":[["a96a3875.5695c8"]]},{"id":"a96a3875.5695c8","type":"function","z":"ec37e354.13c82","name":"Compass","func":"// A port of the Compass example provided by\n// the Sense HAT python library\n// https://github.com/RPi-Distro/python-sense-hat/tree/master/examples\n\nvar led_loop = [4, 5, 6, 7, 15, 23, 31, 39, 47, 55, 63, 62, 61, 60, 59, 58, 57, 56, 48, 40, 32, 24, 16, 8, 0, 1, 2, 3];\nvar led_degree_ratio = led_loop.length / 360.0;\nvar dir_inverted = 360 - msg.payload.compass;\nled_index = Math.floor(led_degree_ratio * dir_inverted);\noffset = led_loop[led_index]\nvar y = Math.floor(offset / 8);\nvar x = offset % 8;\nvar prev_x = context.get('prev_x');\nvar prev_y = context.get('prev_y');\n\nmsg.payload = '';\nif (x != prev_x || y != prev_y) {\n msg.payload = prev_x+\",\"+prev_y+\",off,\"\n}\nmsg.payload += x+\",\"+y+\",blue\";\n\ncontext.set('prev_x',x);\ncontext.set('prev_y',y);\n\nreturn msg;\n\n","outputs":1,"noerr":0,"x":270,"y":39,"wires":[["8a52215e.75ade"]]}]
[{"id":"b3b88507.4c4778","type":"rpi-sensehat out","z":"ec37e354.13c82","name":"","x":469,"y":30,"wires":[]},{"id":"e00b82a.f1ff48","type":"rpi-sensehat in","z":"ec37e354.13c82","name":"","motion":true,"env":false,"stick":false,"x":99,"y":30,"wires":[["3571a1b3.ca8e5e"]]},{"id":"3571a1b3.ca8e5e","type":"function","z":"ec37e354.13c82","name":"Compass","func":"// Based on the Compass example provided by\n// the Sense HAT python library\n// https://github.com/RPi-Distro/python-sense-hat/tree/master/examples\n\nvar led_loop = [4, 5, 6, 7, 15, 23, 31, 39, 47, 55, 63, 62, 61, 60, 59, 58, 57, 56, 48, 40, 32, 24, 16, 8, 0, 1, 2, 3];\nvar led_degree_ratio = led_loop.length / 360.0;\nvar dir = (360 - msg.payload.compass)%360;\n\nfunction getXY(dir) {\n var led_index = Math.floor(led_degree_ratio * (dir%360));\n var offset = led_loop[led_index];\n return [offset % 8,Math.floor(offset / 8)];\n}\n\nvar previous = context.get('previous');\nmsg.payload = '';\n\nvar position = getXY(dir);\nif (!previous || position[0] != previous[0][0] || position[1] != previous[0][1]) {\n if (previous) {\n msg.payload = previous[0][0]+\",\"+previous[0][1]+\",off,\"+\n previous[1][0]+\",\"+previous[1][1]+\",off,\";\n } else {\n msg.payload = \"*,*,off,\";\n }\n previous = [\n position,\n getXY(dir+180)\n ];\n msg.payload += previous[0][0]+\",\"+previous[0][1]+\",red,\"+\n previous[1][0]+\",\"+previous[1][1]+\",white\"\n \n context.set('previous',previous);\n return msg;\n}\nreturn null;\n\n","outputs":1,"noerr":0,"x":279,"y":30,"wires":[["b3b88507.4c4778"]]}]