node-red-nodes/hardware/unicorn/examples/Clock.json

[{"id":"d886ebb5.d40378","type":"inject","z":"40b203f2.bf4dfc","name":"tick","topic":"","payload":"","payloadType":"str","repeat":"3","crontab":"","once":true,"x":90,"y":620,"wires":[["a14fe454.f951f8"]]},{"id":"a14fe454.f951f8","type":"function","z":"40b203f2.bf4dfc","name":"Simple graphical clock","func":"\n// array to hold \"random\" pixels\nvar ranNums = [];\nsu = (context.su || 0);\n\n// create a non-overlapping array of random numbers 0-8\nfunction rerand() {\n    var nums = [0,1,2,3,4,5,6,7,8];\n    var i = nums.length;\n    var j;\n    ranNums = [];\n    while (i--) {\n        j = Math.floor(Math.random() * (i+1));\n        ranNums.push(nums[j]);\n        nums.splice(j,1);\n    }\n}\n\nif (su%4 ===0) {\n    // Get the hours and minutes and split into tens and units\n    var d = new Date();\n    var h = d.getHours();\n    var m = d.getMinutes();\n    var hu = h%10;\n    h = parseInt(h/10);\n    var mu = m%10;\n    m = parseInt(m/10);\n    \n    // Do the tens of hours (red)\n    rerand();\n    node.send({payload:\"1-3,1-3,0,0,0\"});\n    for (var i=0; i<h; i++) {\n        node.send({payload:(1+ranNums[i]%3)+\",\"+(1+parseInt(ranNums[i]/3))+\",255,0,0\"});\n    }\n    \n    // Do the units of hours (green)\n    rerand();\n    node.send({payload:\"4-6,1-3,0,0,0\"});\n    for (var i=0; i<hu; i++) {\n        node.send({payload:(4+ranNums[i]%3)+\",\"+(1+parseInt(ranNums[i]/3))+\",0,255,0\"});\n    }\n    \n    // Do the tens of minutes (yellow)\n    rerand();\n    node.send({payload:\"1-3,4-6,0,0,0\"});\n    for (var i=0; i<m; i++) {\n        node.send({payload:(1+ranNums[i]%3)+\",\"+(4+parseInt(ranNums[i]/3))+\",255,255,0\"});\n    }\n    \n    // Do the unit of minutes (blue)\n    rerand();\n    node.send({payload:\"4-6,4-6,0,0,0\"});\n    for (var i=0; i<mu; i++) {\n        node.send({payload:(4+ranNums[i]%3)+\",\"+(4+parseInt(ranNums[i]/3))+\",0,0,255\"});\n    }\n}\n// Finally add the corner dots for tick/tock\nnode.send({payload:\"0,0,\"+(su===0?\"128,0,128\":\"0,0,0\")+\",7,0,\"+(su===1?\"128,0,128\":\"0,0,0\")+\",7,7,\"+(su===2?\"128,0,128\":\"0,0,0\")+\",0,7,\"+(su===3?\"128,0,128\":\"0,0,0\")})\n\ncontext.su = (su +1) % 4;\n// nothing left to do\nreturn null;","outputs":1,"noerr":0,"x":300,"y":620,"wires":[["651b51cb.9ae4b"]]},{"id":"27c3a2e5.082c6e","type":"comment","z":"40b203f2.bf4dfc","name":"Simple graphical clock for Unicorn Hat","info":"Generates a graphical clock, showing hours and minutes. \n\nHours are shown by the red and green pixels, minutes\nare the yellow and blue pixels.\n\n\nUses the local time of the Pi - you may need to set your local\ntimezone using\n\n    sudo dpkg-reconfigure tzdata\n","x":200,"y":580,"wires":[]},{"id":"651b51cb.9ae4b","type":"rpi-unicorn","z":"40b203f2.bf4dfc","name":"","png":"0,0,0","bright":"20","x":510,"y":620,"wires":[]},{"id":"b2ab1d43.0cbeb","type":"inject","z":"40b203f2.bf4dfc","name":"click to rotate","topic":"","payload":"","payloadType":"str","repeat":"","crontab":"","once":false,"x":110,"y":660,"wires":[["6a7619b6.3bbc68"]]},{"id":"6a7619b6.3bbc68","type":"function","z":"40b203f2.bf4dfc","name":"Rotate","func":"\n// get the current rotation\nvar rot = context.rot || 0;\n// add 90 and get modulus 360\nrot = (rot + 90) % 360;\n// save the new rotation value\ncontext.rot = rot;\n// send the rotation command\nmsg.payload = \"rotate,\"+rot;\nreturn msg;","outputs":1,"noerr":0,"x":350,"y":660,"wires":[["651b51cb.9ae4b"]]}]