{"id":3575,"date":"2022-08-31T18:17:14","date_gmt":"2022-08-31T09:17:14","guid":{"rendered":"https:\/\/oohito.com\/nqthm\/?p=3575"},"modified":"2022-09-01T09:33:26","modified_gmt":"2022-09-01T00:33:26","slug":"scratchlink-%e3%81%ab%e3%81%a4%e3%81%84%e3%81%a6","status":"publish","type":"post","link":"https:\/\/oohito.com\/nqthm\/archives\/3575","title":{"rendered":"ScratchLink \u306b\u3064\u3044\u3066"},"content":{"rendered":"\n<p>ScratchLink \u306fScratch 3.0\u3068\u9023\u643a\u3057\u3066\u5916\u90e8\u306e\u30c7\u30d0\u30a4\u30b9\u306e\u64cd\u4f5c\u3092\u53ef\u80fd\u306b\u3059\u308b\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3067\u3042\u308b\u3002\uff08<a href=\"https:\/\/ja.scratch-wiki.info\/wiki\/Scratch_Link\">Scratch Japan Wiki<\/a>\u3088\u308a\uff09<\/p>\n\n\n\n<p><a href=\"https:\/\/github.com\/LLK\/scratch-link\">\u30bd\u30fc\u30b9\u306fgithub\u3067\u516c\u958b\u3055\u308c\u3066\u304a\u308a<\/a>\u3001Windows\u7248\u3068Mac\u7248\u304c\u5b58\u5728\u3057\u3066\u3044\u308b\u3002Windows\u7248\u306fC#\u3067\u8a18\u8ff0\u3055\u308c\u3066\u304a\u308a\u3001\u3061\u3087\u3063\u3068\u5de5\u592b\u3059\u308c\u3070<a href=\"https:\/\/www.moonmile.net\/blog\/archives\/10205\">\u81ea\u524d\u3067\u30d3\u30eb\u30c9<\/a>\u3082\u53ef\u80fd\u306a\u3088\u3046\u3067\u3042\u308b\u3002\u305f\u3060\u3001\u6b8b\u5ff5\u306a\u304c\u3089Linux\u3067\u306f\u52d5\u4f5c\u3057\u306a\u3044\u3002<\/p>\n\n\n\n<p>\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u6982\u8981\u306b\u3064\u3044\u3066\u306fgithub\u306b<a href=\"https:\/\/github.com\/LLK\/scratch-link\/blob\/develop\/Documentation\/NetworkProtocol.md\">\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/a>\u304c\u516c\u958b\u3055\u308c\u3066\u3044\u308b\u3002\u7279\u306bmicro:bit\u3068\u306e\u63a5\u7d9a\u306b\u8208\u5473\u304c\u3042\u3063\u305f\u304c\u3001\u3088\u308a\u8a73\u7d30\u306b\u8aac\u660e\u3057\u3066\u3044\u308b\u30b5\u30a4\u30c8\u3092\u898b\u3064\u3051\u3089\u308c\u306a\u304b\u3063\u305f\u306e\u3067\u3001Windows\u7248\u3067\u3069\u3046\u306a\u3063\u3066\u3044\u308b\u306e\u304b\u8abf\u3079\u3066\u307f\u305f\u3002<\/p>\n\n\n\n<!--more-->\n\n\n\n<p>ScratchLink \u306f Scratch3.0\uff08\u4ee5\u4e0b\u3001Scratch\u3068\u7565\uff09\u3067micro:bit \u3084MINDSTORMS EV3 \u3092\u64cd\u4f5c\u3059\u308b\u969b\u306b\u7528\u3044\u308b\u305f\u3081\u306e\u30d8\u30eb\u30d1\u30fc\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u3042\u308b\u3002micro:bit \u3068PC\u3068\u306ebluetooth\u63a5\u7d9a\u304c\u5b8c\u4e86\u3057\u3066\u3044\u3066\u3082\u3001Scratch 3.0\u30a2\u30d7\u30ea\u304c\u30c7\u30d0\u30a4\u30b9\u3068\u76f4\u63a5 bluetooth \u3067\u306e\u3084\u308a\u53d6\u308a\u304c\u3067\u304d\u306a\u3044\u305f\u3081\u3001\u4ef2\u4ecb\u5f79\u3068\u3057\u3066\u5b58\u5728\u3057\u3066\u3044\u308b\u3002<\/p>\n\n\n\n<p>\uff08<a href=\"https:\/\/github.com\/LLK\/scratch-link\/issues\/194\">Web Bluetooth API\u3092\u4f7f\u3063\u3066\u63a5\u7d9a\u3059\u308b\u3068\u3044\u3046\u8b70\u8ad6<\/a>\u3082\u3042\u308b\u3088\u3046\u3060\u304c\u3001\u73fe\u6642\u70b9\u3067\u3069\u3046\u3044\u3046\u98a8\u5411\u304d\u306a\u306e\u304b\u306f\u77e5\u3089\u306a\u3044\uff09<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"636\" height=\"179\" src=\"https:\/\/oohito.com\/nqthm\/wp-content\/uploads\/2022\/08\/2022-08-31_16-09.png\" alt=\"\" class=\"wp-image-3576\" srcset=\"https:\/\/oohito.com\/nqthm\/wp-content\/uploads\/2022\/08\/2022-08-31_16-09.png 636w, https:\/\/oohito.com\/nqthm\/wp-content\/uploads\/2022\/08\/2022-08-31_16-09-300x84.png 300w\" sizes=\"auto, (max-width: 636px) 100vw, 636px\" \/><\/figure>\n\n\n\n<p>\u4e0a\u56f3\u306e\u3088\u3046\u306bScratch\u3068\u306fwebsocket\u3067\u63a5\u7d9a\u3057\u3001JSON-RPC \u3092\u4f7f\u3063\u3066\u3084\u308a\u53d6\u308a\u3057\u3066\u3044\u308b\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u901a\u4fe1\u30d7\u30ed\u30c8\u30b3\u30eb<\/h2>\n\n\n\n<p>\u901a\u4fe1\u306e\u6d41\u308c\u3068\u3057\u3066\u306f\u3001ScratchLink\u3068\u306e\u63a5\u7d9a\u2192\u30c7\u30d0\u30a4\u30b9\u306e\u30b9\u30ad\u30e3\u30f3\u2192\u30c7\u30d0\u30a4\u30b9\u3078\u306e\u63a5\u7d9a\u2192\u30bb\u30f3\u30b5\u30fc\u30c7\u30fc\u30bf\u306e\u9001\u4fe1\u8981\u6c42\u306e\u9806\u3068\u306a\u3063\u3066\u304a\u308a\u3001\u305d\u306e\u5f8c\u306f\u9069\u5b9c\u3001\u753b\u9762\u30c7\u30fc\u30bf\u306e\u9001\u4fe1\u304c\u306a\u3055\u308c\u3066\u3044\u308b\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">ScratchLink\u3068\u306e\u63a5\u7d9a\uff08Scratch-&gt;ScratchLink\uff09<\/h3>\n\n\n\n<p>microbit\u62e1\u5f35\u304c\u30af\u30ea\u30c3\u30af\u3055\u308c\u308b\u3068\u3001Scratch\u306f websocket \u3092\u4ecb\u3057\u3066 ws:\/\/127.0.0.1\/scratch\/ble \u306b\u63a5\u7d9a\u3092\u8a66\u307f\u308b\u3002<\/p>\n\n\n\n<p>\u30bd\u30fc\u30b9\u4e0a\u3067\u306f\u3001scratch-vm\/src\/extensions\/scratch3_microbit\/index.js \u306escan()\u306b\u3088\u308aBLE\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u751f\u6210\u3055\u308c\u3001\u305d\u306e\u904e\u7a0b\u3067 scratch-vm\/src\/util\/scratch-link-websocket.js \u306eopen()\u3067websocket\u306b\u63a5\u7d9a\u3059\u308b\u3002<\/p>\n\n\n\n<p>ScratchLink \u5074\u3067\u306f\u3001scratch-link\/Windows\/scratch-link\/App.cs \u306e App() \u306b\u304a\u3044\u3066\u30bd\u30b1\u30c3\u30c8\u304c\u4f5c\u6210\u3055\u308c\u3001\u30dd\u30fc\u30c8\u756a\u53f720111\u306b\u3066\u63a5\u7d9a\u3092\u53d7\u3051\u5165\u308c\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u308b\u3002<\/p>\n\n\n\n<p>websocket\u3067 ScratchLink \u306b\u63a5\u7d9a\u3067\u304d\u306a\u304b\u3063\u305f\u5834\u5408\u306b\u306f\u4ee5\u4e0b\u306e\u753b\u9762\u304c\u8868\u793a\u3055\u308c\u308b\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"501\" height=\"345\" src=\"https:\/\/oohito.com\/nqthm\/wp-content\/uploads\/2022\/08\/2022-08-31_16-29.png\" alt=\"\" class=\"wp-image-3578\" srcset=\"https:\/\/oohito.com\/nqthm\/wp-content\/uploads\/2022\/08\/2022-08-31_16-29.png 501w, https:\/\/oohito.com\/nqthm\/wp-content\/uploads\/2022\/08\/2022-08-31_16-29-300x207.png 300w\" sizes=\"auto, (max-width: 501px) 100vw, 501px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u30c7\u30d0\u30a4\u30b9\u306e\u30b9\u30ad\u30e3\u30f3\u8981\u6c42\uff08Scratch-&gt;ScratchLink\uff09<\/h3>\n\n\n\n<p>websocket \u3078\u306e\u63a5\u7d9a\u304c\u3046\u307e\u304f\u3044\u3063\u305f\u3089\u3001\u6b21\u306f microbit \u30c7\u30d0\u30a4\u30b9\u306e\u30b9\u30ad\u30e3\u30f3\u304c\u884c\u308f\u308c\u308b\u3002<\/p>\n\n\n\n<p>Scratch \u5074\u3067\u306f scratch-vm\/src\/io\/ble.js \u306e requestPeripheral() \u306b\u304a\u3044\u3066\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306aJSON-RPC \u8981\u6c42\u304c ScratchLink \u306b\u9001\u3089\u308c\u308b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{\"jsonrpc\":\"2.0\",\n \"method\":\"discover\",\n \"params\":{\"filters\":&#91;{\"services\":&#91;61445]}]},\n \"id\":0}<\/code><\/pre>\n\n\n\n<p>ScratchLink \u3067\u306fJSON-RPC 2.0\u304c\u7528\u3044\u3089\u308c\u3066\u304a\u308a\u3001method \u3067\u6307\u5b9a\u3057\u305f RPC(remote procedure call) \u3092\u5b9f\u884c\u3059\u308b\u3002\u3053\u306e\u5834\u5408\u306fparams\u4ee5\u4e0b\u306e\u30c7\u30a3\u30af\u30b7\u30e7\u30ca\u30ea\u30c7\u30fc\u30bf\u3092\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066 discover \u3092\u547c\u3073\u51fa\u3057\u3066\u3044\u308b\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30c7\u30d0\u30a4\u30b9\u306e\u30b9\u30ad\u30e3\u30f3\u5fdc\u7b54\uff08ScratchLink-&gt;Scratch\uff09<\/h3>\n\n\n\n<p>ScratchLink \u5074\u3067\u306f\u3001scratch-link\/Windows\/scratch-link\/BLESession.cs \u306eDidReceiveCall()\u306b\u304a\u3044\u3066 RPC \u306e\u30c7\u30a3\u30b9\u30d1\u30c3\u30c1\u304c\u884c\u308f\u308c\u3001Discover()\u306b\u3066\u5b9f\u969b\u306e\u51e6\u7406\u304c\u884c\u308f\u308c\u308b\u3002\u5185\u5bb9\u3068\u3057\u3066\u306fBLE \u3092\u901a\u3058\u3066\u975e\u540c\u671f\u7684\u306b microbit \u3092\u30b9\u30ad\u30e3\u30f3\u3057\u3001\u898b\u3064\u304b\u3063\u305f\u30c7\u30d0\u30a4\u30b9\u3092 OnAdvertisementReceived() \u306b\u304a\u3044\u3066 Scratch \u306b\u901a\u77e5\u3059\u308b\u3002\u5177\u4f53\u7684\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a JSON-RPC \u8981\u6c42\u304c Scratch \u306b\u9001\u3089\u308c\u308b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{\"jsonrpc\":\"2.0\"\n \"method\":\"didDiscoverPeripheral\"\n \"params\":{\"name\": <strong>&lt;Advertisement.LocalName&gt;<\/strong>,\n           \"rssi\": <strong>&lt;RawSignalStrengthInDBm&gt;<\/strong>,\n           \"peripheralId\": <strong>&lt;BluetoothAddress&gt;<\/strong>}<\/code><\/pre>\n\n\n\n<p>params\u306ename\u306b\u6307\u5b9a\u3059\u308b\u306e\u306f\u30c7\u30d0\u30a4\u30b9\u306e\u540d\u524d\u3067\u4efb\u610f\u306e\u3082\u306e\u3068\u306a\u308b\u3002rssi\u306f\u4fe1\u53f7\u5f37\u5ea6\u3067\u8ca0\u306e\u5024\u304cshort\u3067\u5165\u308b\u3002\uff08<a href=\"https:\/\/github.com\/LLK\/scratch-link\/blob\/develop\/Documentation\/NetworkProtocol.md\">\u5148\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/a>\u306b\u8a73\u7d30\u304c\u66f8\u304b\u308c\u3066\u3044\u308b\uff09peripheralId\u306b\u306fmicrobit\u306ebluetooth\u30a2\u30c9\u30ec\u30b9\u304c64bit\u975e\u8ca0\u6574\u6570\u3067\u5165\u308b\u3002<\/p>\n\n\n\n<p>Scratch \u5074\u3067\u306f\u3001scratch-vm\/src\/io\/ble.js \u306e didReceiveCall() \u306b\u3066RPC\u306e\u30c7\u30a3\u30b9\u30d1\u30c3\u30c1\u304c\u884c\u308f\u308c\u3066\u3044\u308b\u3002\u9001\u3089\u308c\u3066\u304d\u305f didDiscoverPeripheral \u306e\u5bfe\u5fdc\u3068\u3057\u3066\u3001\u898b\u3064\u304b\u3063\u305f\u30c7\u30d0\u30a4\u30b9\u304c\u767b\u9332\u3055\u308c\u3001\u30a2\u30d7\u30ea\u753b\u9762\u4e0a\u306b\u305d\u306e\u30c7\u30d0\u30a4\u30b9\u304c\u8868\u793a\u3055\u308c\u308b\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"498\" height=\"377\" src=\"https:\/\/oohito.com\/nqthm\/wp-content\/uploads\/2022\/08\/2022-08-31_16-58.png\" alt=\"\" class=\"wp-image-3579\" srcset=\"https:\/\/oohito.com\/nqthm\/wp-content\/uploads\/2022\/08\/2022-08-31_16-58.png 498w, https:\/\/oohito.com\/nqthm\/wp-content\/uploads\/2022\/08\/2022-08-31_16-58-300x227.png 300w, https:\/\/oohito.com\/nqthm\/wp-content\/uploads\/2022\/08\/2022-08-31_16-58-80x60.png 80w\" sizes=\"auto, (max-width: 498px) 100vw, 498px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u30c7\u30d0\u30a4\u30b9\u3068\u306e\u63a5\u7d9a\uff08Scratch-&gt;ScratchLink-&gt;Scratch\uff09<\/h3>\n\n\n\n<p>\u30e6\u30fc\u30b6\u30fc\u304c\u300c\u63a5\u7d9a\u3059\u308b\u300d\u30dc\u30bf\u30f3\u3092\u62bc\u3059\u3068\u3001\u305d\u306e\u30c7\u30d0\u30a4\u30b9\u306b\u63a5\u7d9a\u8981\u6c42\u304c\u884c\u308f\u308c\u308b\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"498\" height=\"373\" src=\"https:\/\/oohito.com\/nqthm\/wp-content\/uploads\/2022\/08\/2022-08-31_17-16.png\" alt=\"\" class=\"wp-image-3580\" srcset=\"https:\/\/oohito.com\/nqthm\/wp-content\/uploads\/2022\/08\/2022-08-31_17-16.png 498w, https:\/\/oohito.com\/nqthm\/wp-content\/uploads\/2022\/08\/2022-08-31_17-16-300x225.png 300w, https:\/\/oohito.com\/nqthm\/wp-content\/uploads\/2022\/08\/2022-08-31_17-16-80x60.png 80w\" sizes=\"auto, (max-width: 498px) 100vw, 498px\" \/><\/figure>\n\n\n\n<p>Scratch \u5074\u3067\u306f scratch-vm\/src\/extensions\/scratch3_microbit\/index.js \u306e connect() \u304c\u8d77\u52d5\u3055\u308c\u3066\u3001\u305d\u306e\u307e\u307e scratch-vm\/src\/io\/ble.js \u306e connectPeripheral() \u306b\u304a\u3044\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306a JSON-RPC \u8981\u6c42\u304c ScratchLink \u306b\u9001\u3089\u308c\u308b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{\"jsonrpc\":\"2.0\",\n \"method\":\"connect\",\n \"params\":{\"peripheralId\":<strong>&lt;BluetoothAddress&gt;<\/strong>},\n \"id\":1}<\/code><\/pre>\n\n\n\n<p>\u3053\u3053\u3067\u3001params\u306eperipheralId\u306b\u306f\u3001\u30c7\u30d0\u30a4\u30b9\u306e\u30b9\u30ad\u30e3\u30f3\u6642\u3067\u5f97\u3089\u308c\u305fmicrobit\u306ebluetooth\u30a2\u30c9\u30ec\u30b9\u304c\u5165\u308b\u3002<\/p>\n\n\n\n<p>ScratchLink \u5074\u3067\u306f scratch-link\/Windows\/scratch-link\/BLESession.cs \u306e Connect() \u3067\u3001microbit \u3068\u306e\u63a5\u7d9a\u3092\u884c\u3063\u3066\u3044\u308b\u3002<\/p>\n\n\n\n<p>microbit\u3068\u306eBLE\u63a5\u7d9a\u304c\u3067\u304d\u305f\u3089\u3001JSON-RPC \u5fdc\u7b54\u3092\u8fd4\u3059\u3002JSON-RPC \u5fdc\u7b54\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3042\u308b\u3002\uff08\u63a5\u7d9a\u3067\u304d\u306a\u304b\u3063\u305f\u5834\u5408\u306f\u3001\u30a8\u30e9\u30fc\u306eJSON-RPC \u5fdc\u7b54\u3092\u8fd4\u3059\u3002\u3053\u3053\u3067\u306f\u7701\u7565\uff09<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{\"jsonrpc\":\"2.0\",\"id\":1,\"result\":null}<\/code><\/pre>\n\n\n\n<p>Scratch \u5074\u3067\u306f JSON-RPC \u5fdc\u7b54\u3092\u53d7\u3051\u53d6\u3063\u305f\u3068\u3053\u308d\u3067\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u753b\u9762\u3068\u306a\u308b\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"496\" height=\"378\" src=\"https:\/\/oohito.com\/nqthm\/wp-content\/uploads\/2022\/08\/2022-08-31_17-15.png\" alt=\"\" class=\"wp-image-3581\" srcset=\"https:\/\/oohito.com\/nqthm\/wp-content\/uploads\/2022\/08\/2022-08-31_17-15.png 496w, https:\/\/oohito.com\/nqthm\/wp-content\/uploads\/2022\/08\/2022-08-31_17-15-300x229.png 300w, https:\/\/oohito.com\/nqthm\/wp-content\/uploads\/2022\/08\/2022-08-31_17-15-80x60.png 80w\" sizes=\"auto, (max-width: 496px) 100vw, 496px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u30bb\u30f3\u30b5\u30fc\u30c7\u30fc\u30bf\u306e\u9001\u4fe1\u8981\u6c42\uff08Scratch-&gt;ScratchLink\uff09<\/h3>\n\n\n\n<p>microbit\u3068\u306e\u63a5\u7d9a\u304c\u6e08\u3080\u3068\u3001\u3059\u3050\u306bmicrobit\u306e\u30bb\u30f3\u30b5\u30fc\u30c7\u30fc\u30bf\uff08\u30dc\u30bf\u30f3\u3001\u30bf\u30c3\u30c1\u3001\u52a0\u901f\u5ea6\u30bb\u30f3\u30b5\u7b49\uff09\u306e\u8981\u6c42\u304c\u884c\u308f\u308c\u308b\u3002<\/p>\n\n\n\n<p>Scratch \u5074\u3067\u306f scratch-vm\/src\/extensions\/scratch3_microbit\/index.js \u306e _onConnect() \u304b\u3089\u3001scratch-vm\/src\/io\/ble.js \u306e read() \u304c\u547c\u3070\u308c\u3001\u305d\u3053\u3067\u4ee5\u4e0b\u306e\u3088\u3046\u306a JSON-RPC \u8981\u6c42\u304c\u9001\u3089\u308c\u308b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{\"jsonrpc\":\"2.0\",\n \"method\":\"<strong>read<\/strong>\",\n \"params\":{\"serviceId\":61445,\n           \"characteristicId\":\"5261da01-fa7e-42ab-850b-7c80220097cc\",\n           \"startNotifications\":true},\n \"id\":2}<\/code><\/pre>\n\n\n\n<p>BLE\u901a\u4fe1\u3067\u306f\u30c7\u30d0\u30a4\u30b9\u306e\u6a5f\u80fd\u3092\u5229\u7528\u3059\u308b\u5834\u5408\u306f serviceId \u3068 characteristicId \u3092\u6307\u5b9a\u3059\u308b\uff08\u3089\u3057\u3044\uff09\u3053\u3053\u3067\u306f\u3001microbit \u306e\u30bb\u30f3\u30b5\u30fc\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306b\u4e0a\u8a18\u306e\u5024\u3092\u6307\u5b9a\u3059\u308b\u3002<\/p>\n\n\n\n<p>\u307e\u305f\u3001\u5b9a\u671f\u7684\u306b\u60c5\u5831\u3092\u9001\u308b\u3088\u3046 startNotifications \u3092 true \u306b\u3057\u3066\u3044\u308b\u3002<\/p>\n\n\n\n<p>ScratchLink \u5074\u3067\u306f\u3001scratch-link\/Windows\/scratch-link\/BLESession.cs \u306e Read() \u3067 RPC \u306eparams\u3092\u53d7\u3051\u53d6\u308a\u3001microbit \u306b\u5bfe\u3057\u3066\u30bb\u30f3\u30b5\u30fc\u30c7\u30fc\u30bf\u304c\u5909\u308f\u308b\u305f\u3073\u306b\u901a\u77e5\u3059\u308b\u3088\u3046\u306b\u8a2d\u5b9a\u3059\u308b\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30bb\u30f3\u30b5\u30fc\u30c7\u30fc\u30bf\u306e\u9001\u4fe1\uff08ScratchLink-&gt;Scratch\uff09<\/h3>\n\n\n\n<p>microbit\u306e\u30bb\u30f3\u30b5\u30fc\u30c7\u30fc\u30bf\u304c\u5909\u5316\u3059\u308b\u3068\u3001scratch-link\/Windows\/scratch-link\/BLESession.cs \u306e OnValueChanged() \u304c\u547c\u3070\u308c\u3001\u305d\u3053\u3067Scratch\u3078  JSON-RPC \u8981\u6c42\u304c\u9001\u3089\u308c\u308b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{\"jsonrpc\":\"2.0\",\n \"method\":\"<strong>characteristicDidChange<\/strong>\",\n \"params\":{\"serviceId\":61445,\n           \"characteristicId\":\"5261da01-fa7e-42ab-850b-7c80220097cc\",\n           \"encoding\":\"base64\",\n           \"message\":<strong>&lt;B64Message&gt;<\/strong>},\n \"id\":2}<\/code><\/pre>\n\n\n\n<p>method\u306b\u306fcharacteristicDidChange\u3092\u6307\u5b9a\u3059\u308b\u3002\u307e\u305f\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u306f10\u30d0\u30a4\u30c8\u306e\u30d0\u30a4\u30c8\u5217\u3092Base64\u5f62\u5f0f\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u305f\u6587\u5b57\u5217\u3092\u6307\u5b9a\u3059\u308b\u3002\u5404\u30d0\u30a4\u30c8\u306e\u610f\u5473\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"314\" height=\"405\" src=\"https:\/\/oohito.com\/nqthm\/wp-content\/uploads\/2022\/08\/2022-08-31_17-43.png\" alt=\"\" class=\"wp-image-3583\" srcset=\"https:\/\/oohito.com\/nqthm\/wp-content\/uploads\/2022\/08\/2022-08-31_17-43.png 314w, https:\/\/oohito.com\/nqthm\/wp-content\/uploads\/2022\/08\/2022-08-31_17-43-233x300.png 233w\" sizes=\"auto, (max-width: 314px) 100vw, 314px\" \/><\/figure>\n\n\n\n<p>\u52a0\u901f\u5ea6\u30bb\u30f3\u30b5\u30fc\u306e\u5024\u306f\u7b26\u53f7\u4ed8\u304d\u306e16\u30d3\u30c3\u30c8\u6574\u6570\u3067\u3042\u308b\u3002\u307e\u305f\u3001\u30b8\u30a7\u30b9\u30c1\u30e3\u30fc\u306e\u30d3\u30c3\u30c8\u5217\u306e\u610f\u5473\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3002\uff08\u4f8b\u3048\u3070\u3001\u300c\u632f\u3089\u308c\u305f\u300d\u304c\u6709\u52b9\u306a\u3089\u3070\u5024\u306f 0b001 \u3068\u306a\u308b\uff09<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"240\" height=\"167\" src=\"https:\/\/oohito.com\/nqthm\/wp-content\/uploads\/2022\/08\/2022-08-31_17-47.png\" alt=\"\" class=\"wp-image-3584\"\/><\/figure>\n\n\n\n<p>Scratch \u5074\u3067\u306f\u3001scratch-vm\/src\/extensions\/scratch3_microbit\/index.js \u306e _onMessage() \u3067\u53d7\u3051\u53d6\u3063\u305f RPC \u3092\u51e6\u7406\u3057\u3001\u5f97\u3089\u308c\u305f\u30bb\u30f3\u30b5\u30fc\u30c7\u30fc\u30bf\u3092\u5185\u90e8\u72b6\u614b\u306b\u53cd\u6620\u3055\u305b\u308b\u3002<\/p>\n\n\n\n<p>\u3044\u304f\u3064\u304b\u6ce8\u610f\u70b9\u304c\u3042\u308b\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\uff14\uff0e\uff15\u79d2\u4ee5\u5185\u306e\u9593\u9694\u3067\u9001\u4fe1\u3057\u7d9a\u3051\u306a\u3044\u3068\u30c7\u30d0\u30a4\u30b9\u306e\u63a5\u7d9a\u304c\u89e3\u9664\u3055\u308c\u308b\u3002<\/li><li>\u30a2\u30d7\u30ea\u3067\u8868\u793a\u3055\u308c\u308b\u5024\u306f\u3001\u52a0\u901f\u5ea6\u30bb\u30f3\u30b5\u306e\u30c7\u30fc\u30bf\u306e10\u5206\u306e1\u5024\u304c\u4f7f\u308f\u308c\u308b\u3002<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u753b\u9762\u30c7\u30fc\u30bf\u306e\u9001\u4fe1\uff08Scratch-&gt;ScratchLink\uff09<\/h3>\n\n\n\n<p>\u30a2\u30d7\u30ea\u3067\u300c\u8868\u793a\u3059\u308b\u300d\u300c\u753b\u9762\u3092\u6d88\u3059\u300d\u30d6\u30ed\u30c3\u30af\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u3001microbit\u306e\u30c7\u30a3\u30b9\u30d7\u30ec\u30a4\u306b\u6587\u5b57\u3084\u753b\u50cf\u304c\u8868\u793a\u3055\u308c\u308b\u3002\u3053\u308c\u3089\u3082\u3001ScratchLink \u306b\u5bfe\u3057\u3066JSON-RPC \u8981\u6c42\u3092\u9001\u308b\u3053\u3068\u3067\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b\u3002<\/p>\n\n\n\n<p>Scratch \u5074\u3067\u306f\u3001scratch-vm\/src\/extensions\/scratch3_microbit\/index.js \u306e send() \u304b\u3089\u3001scratch-vm\/src\/io\/ble.js \u306e write() \u304c\u547c\u3070\u308c\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a JSON-RPC \u8981\u6c42\u304c\u4f5c\u3089\u308c\u308b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{\"jsonrpc\":\"2.0\",\n \"method\":\"<strong>write<\/strong>\",\n \"params\":{\"serviceId\":61445,\n           \"characteristicId\":\"5261da02-fa7e-42ab-850b-7c80220097cc\",\n           \"message\":<strong>&lt;B64Message&gt;<\/strong>,\n           \"encoding\":\"base64\",\n           \"withResponse\":true},\n \"id\":3}<\/code><\/pre>\n\n\n\n<p>method\u306b\u306fwrite\u3092\u6307\u5b9a\u3059\u308b\u3002\u307e\u305f\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u30d0\u30a4\u30c8\u5217\u3092Base64\u5f62\u5f0f\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u305f\u6587\u5b57\u5217\u3092\u6307\u5b9a\u3059\u308b\u3002<\/p>\n\n\n\n<p>\u30d0\u30a4\u30c8\u5217\u306e\uff11\u30d0\u30a4\u30c8\u76ee\u304c 0x81 \u306e\u5834\u5408\u306f\uff12\u30d0\u30a4\u30c8\u76ee\u4ee5\u964d\u306b\u6587\u5b57\u5217\u3092\u6307\u5b9a\u3059\u308b\uff08\u30b9\u30af\u30ed\u30fc\u30eb\u8868\u793a\u3055\u308c\u308b\uff09\u3002\u307e\u305f 0x82 \u306e\u5834\u5408\u306f\uff12\u30d0\u30a4\u30c8\u76ee\u304b\u3089\uff16\u30d0\u30a4\u30c8\u76ee\u307e\u3067\u54045\u30d3\u30c3\u30c8\u306e\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u3092\u6307\u5b9a\u3059\u308b\uff08\u305d\u308c\u305e\u308c\u306e\u30d3\u30c3\u30c8\u304c\u30d4\u30af\u30bb\u30eb\u306b\u5bfe\u5fdc\u3057\u3066\u8868\u793a\u3055\u308c\u308b\uff09\u3002<\/p>\n\n\n\n<p>ScratchLink \u5074\u3067\u306f\u3001scratch-link\/Windows\/scratch-link\/BLESession.cs \u306e Write() \u306b\u3088\u308a microbit \u306b\u30c7\u30fc\u30bf\u3092\u9001\u308b\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0a\u3001ScratchLink \u306e\u52d5\u4f5c\u3084\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u8a73\u7d30\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u305f\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Python\u3067\u306e\u30b5\u30f3\u30d7\u30eb<\/h2>\n\n\n\n<p>\u4e0a\u8a18\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u5b9f\u88c5\u3059\u308c\u3070\u3001\u3069\u306e\u3088\u3046\u306a\u8a00\u8a9e\u3067\u3082 ScratchLink \u3068\u540c\u69d8\u306e\u3053\u3068\u306f\u3067\u304d\u308b\u3002\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u78ba\u8a8d\u306b\u4f7f\u3063\u305f Python \u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u4ee5\u4e0b\u306b\u793a\u3059\u3002\uff08<a href=\"https:\/\/gist.github.com\/EiichiroIto\/3716d92771bcd9f50dbe367425f341c6\">gist<\/a>\uff09<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from websocket_server import WebsocketServer\nimport json\nimport base64\nimport time\nfrom threading import Timer\n\nconnecting = False\n\ndef update(client,server):\n    while connecting:\n        print(\"sending {}-&gt;{}\".format(client,server))\n        b64 = base64.b64encode(bytes(&#91;0,123,1,0,1,1,1,1,1,1])).decode('utf-8')\n        response = '{\"jsonrpc\":\"2.0\",\"method\":\"characteristicDidChange\",\"params\":{\"serviceId\":61445,\"characteristicId\":\"5261da01-fa7e-42ab-850b-7c80220097cc\",\"encoding\":\"base64\",\"message\":\"' + b64 + '\"}}'\n        server.send_message(client, response)\n        time.sleep(1)\n    print(\"Update exited\")\n\ndef new_client(client, server):\n    print(\"New client connected: %d\" % client&#91;'id'])\n\ndef client_left(client, server):\n    global connecting\n    print(\"Client disconnected: %d\" % client&#91;'id'])\n    connecting = False\n\ndef message_received(client, server, message):\n    global connecting\n    if len(message) &gt; 200:\n        message = message&#91;:200]+'..'\n    print(\"Client(%d) said: %s\" % (client&#91;'id'], message))\n    dict = json.loads(message)\n    if dict&#91;'method'] == 'discover':\n        id = dict&#91;'id']\n        response = '{\"jsonrpc\":\"2.0\",\"id\":'+str(id)+',\"result\":null}'\n        server.send_message(client, response)\n        response = '{\"jsonrpc\":\"2.0\",\"method\":\"didDiscoverPeripheral\",\"params\":{\"name\":\"python\",\"rssi\":-70,\"peripheralId\":65536}}'\n        server.send_message(client, response)\n    if dict&#91;'method'] == 'connect':\n        id = dict&#91;'id']\n        response = '{\"jsonrpc\":\"2.0\",\"id\":'+str(id)+',\"result\":null}'\n        server.send_message(client, response)\n    if dict&#91;'method'] == 'read':\n        connecting = True\n        timer = Timer(1, update, (client, server))\n        timer.start()\n    if dict&#91;'method'] == 'write':\n        message = base64.b64decode(dict&#91;'params']&#91;'message'])\n        if message&#91;0] == 0x81:\n            print('Say \"'+message&#91;1:].decode('utf-8')+'\"')\n        elif message&#91;0] == 0x82:\n            for x in list(message&#91;1:]):\n                print(format(x,\"05b\")&#91;::-1])\n        id = dict&#91;'id']\n        response = '{\"jsonrpc\":\"2.0\",\"id\":'+str(id)+',\"result\":null}'\n        server.send_message(client, response)\n\nPORT=20111\nserver = WebsocketServer(port = PORT)\nserver.set_fn_new_client(new_client)\nserver.set_fn_client_left(client_left)\nserver.set_fn_message_received(message_received)\nserver.run_forever()<\/code><\/pre>\n\n\n\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f websocket \u306e\u901a\u4fe1\u306e\u305f\u3081\u306b <a href=\"https:\/\/github.com\/Pithikos\/python-websocket-server\">python-websocket-server<\/a> \u3092\u7528\u3044\u3066\u3044\u308b\u3002\uff08\u4e0a\u8a18\u30b3\u30fc\u30c9\u3082\u305d\u306e\u30b5\u30f3\u30d7\u30eb\u3092\u6539\u9020\u3057\u305f\u3082\u306e\uff09\u3042\u3089\u304b\u3058\u3081\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u3066\u304a\u304f\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>pip install websocket-server<\/code><\/pre>\n\n\n\n<p>\u5148\u306e\u30b3\u30fc\u30c9\u3092\u9069\u5f53\u306a\u30d5\u30a1\u30a4\u30eb\u540d\uff08\u4f8b\u3048\u3070 scratchlink.py \uff09\u3067\u4fdd\u5b58\u3057\u3066\u304a\u304d\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5b9f\u884c\u3059\u308b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>python scratchlink.py<\/code><\/pre>\n\n\n\n<p>\u8d77\u52d5\u3057\u305f\u72b6\u614b\u306e\u307e\u307e<a href=\"https:\/\/scratch.mit.edu\/\">\u30b9\u30af\u30e9\u30c3\u30c1\u306e\u30b5\u30a4\u30c8<\/a>\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3001\u300c\u4f5c\u308b\u300d\u3092\u9078\u3093\u3067\u5de6\u4e0b\u306e\u300c\u62e1\u5f35\u6a5f\u80fd\u3092\u8ffd\u52a0\u300d\u304b\u3089\u300cmicro:bit\u300d\u3092\u9078\u3076\u3068\u300cpython\u300d\u3068\u3044\u3046\u540d\u524d\u306e\u30c7\u30d0\u30a4\u30b9\u304c\u8868\u793a\u3055\u308c\u308b\u306e\u3067\u63a5\u7d9a\u3059\u308b\u3002<\/p>\n\n\n\n<p>\u30bb\u30f3\u30b5\u30fc\u30c7\u30fc\u30bf\u306f\u56fa\u5b9a\u5024\u3092\u9001\u3063\u3066\u3044\u308b\u3060\u3051\u306a\u306e\u3067\u5909\u5316\u3057\u306a\u3044\u304c\u3001\u8868\u793a\u30d6\u30ed\u30c3\u30af\u3092\u30af\u30ea\u30c3\u30af\u3059\u308c\u3070\u3001\u305d\u306e\u5185\u5bb9\u304c scratchlink.py \u3092\u8d77\u52d5\u3057\u305f\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u8868\u793a\u3055\u308c\u308b\uff08\u306f\u305a\uff09\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>ScratchLink \u306fScratch 3.0\u3068\u9023\u643a\u3057\u3066\u5916\u90e8\u306e\u30c7\u30d0\u30a4\u30b9\u306e\u64cd\u4f5c\u3092\u53ef\u80fd\u306b\u3059\u308b\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3067\u3042\u308b\u3002\uff08Scratch Japan Wiki\u3088\u308a\uff09 \u30bd\u30fc\u30b9\u306fgithub\u3067\u516c\u958b\u3055\u308c\u3066\u304a\u308a\u3001Windows\u7248\u3068Mac\u7248&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"class_list":["post-3575","post","type-post","status-publish","format-standard","hentry","category-scratch"],"_links":{"self":[{"href":"https:\/\/oohito.com\/nqthm\/wp-json\/wp\/v2\/posts\/3575","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oohito.com\/nqthm\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/oohito.com\/nqthm\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/oohito.com\/nqthm\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/oohito.com\/nqthm\/wp-json\/wp\/v2\/comments?post=3575"}],"version-history":[{"count":12,"href":"https:\/\/oohito.com\/nqthm\/wp-json\/wp\/v2\/posts\/3575\/revisions"}],"predecessor-version":[{"id":3598,"href":"https:\/\/oohito.com\/nqthm\/wp-json\/wp\/v2\/posts\/3575\/revisions\/3598"}],"wp:attachment":[{"href":"https:\/\/oohito.com\/nqthm\/wp-json\/wp\/v2\/media?parent=3575"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/oohito.com\/nqthm\/wp-json\/wp\/v2\/categories?post=3575"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/oohito.com\/nqthm\/wp-json\/wp\/v2\/tags?post=3575"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}