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yuuu

弊社ではUT-201BLEおよびUA-651BLEを以下ドキュメントを参考に技術検証しています。

https://obniz.com/ja/sdk/parts/UT201BLE/README.md
https://obniz.com/ja/sdk/parts/UA651BLE/README.md

以下の内容をobnizクラウドのHTMLプログラムに入力して実行したところ、BLE通信を行うタイミングで50%程度の確率でエラーとなります。

<html>
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <link
      rel="stylesheet"
      href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"
    />
    <link rel="stylesheet" href="/css/starter-sample.css" />
    <script src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
    <script
      src="https://unpkg.com/obniz@3.16.0/obniz.js"
      crossorigin="anonymous"
    ></script>
  </head>
  <body>
    <h1>動作確認結果<h1>
    <script>
const obniz = new Obniz("xxxx-xxxx");
const IBS02 = Obniz.getPartsClass('iBS02PIR');
const UT201BLE = Obniz.getPartsClass("UT201BLE");
const UA651BLE = Obniz.getPartsClass("UA651BLE");

obniz.onconnect = async () => {
	await obniz.ble.initWait();

	obniz.ble.scan.onfind = async (peripheral) => {
		if (IBS02.isDevice(peripheral)) {
			const data = IBS02.getData(peripheral);
			console.log(data);
		} else if (UT201BLE.isDevice(peripheral)) {
			const device = new UT201BLE(peripheral);
			const data = await device.getDataWait();
			console.log(data);
			obniz.ble.scan.startWait(null, { duplicate: true, duration: null });
		} else if (UA651BLE.isDevice(peripheral)) {
			const device = new UA651BLE(peripheral);
			const data = await device.getDataWait();
			console.log(data);
			obniz.ble.scan.startWait(null, { duplicate: true, duration: null });
		}
	};
	
	obniz.ble.scan.onfinish = async (peripherals, error) => {
		console.log("scan timeout!")
	};
	
	obniz.ble.scan.startWait(null, { duplicate: true, duration: null });
};
    </script>
  </body>
</html>

エラーが発生した時、以下のerror1またはerror2のいずれかのログが出力されます。

/Users/user/src/github.com/githubuser/proto-hydra/device/obniz/IoTGateway/node_modules/obniz/dist/src/obniz/ObnizConnection.js:378
                        throw err;
                        ^

ObnizBleHciStateError: Connection Failed to be Established / Synchronization Timeout  {"peripheralAddress":"b8804f58aa42"}
    at NobleBindings.onDisconnComplete (/Users/user/src/github.com/githubuser/proto-hydra/device/obniz/IoTGateway/node_modules/obniz/dist/src/obniz/libs/embeds/bleHci/protocol/central/bindings.js:189:27)
    at Hci.emit (/Users/user/src/github.com/githubuser/proto-hydra/device/obniz/IoTGateway/node_modules/eventemitter3/index.js:203:33)
    at Hci.onHciEventData (/Users/user/src/github.com/githubuser/proto-hydra/device/obniz/IoTGateway/node_modules/obniz/dist/src/obniz/libs/embeds/bleHci/protocol/hci.js:888:18)
    at Hci.onSocketData (/Users/user/src/github.com/githubuser/proto-hydra/device/obniz/IoTGateway/node_modules/obniz/dist/src/obniz/libs/embeds/bleHci/protocol/hci.js:954:18)
    at ObnizBLEHci.notified (/Users/user/src/github.com/githubuser/proto-hydra/device/obniz/IoTGateway/node_modules/obniz/dist/src/obniz/libs/embeds/bleHci/hci.js:69:22)
    at ObnizBLE.notifyFromObniz (/Users/user/src/github.com/githubuser/proto-hydra/device/obniz/IoTGateway/node_modules/obniz/dist/src/obniz/libs/embeds/bleHci/ble.js:122:22)
    at Obniz._notifyToModule (/Users/user/src/github.com/githubuser/proto-hydra/device/obniz/IoTGateway/node_modules/obniz/dist/src/obniz/ObnizComponents.js:271:37)
    at Obniz._notifyToModule (/Users/user/src/github.com/githubuser/proto-hydra/device/obniz/IoTGateway/node_modules/obniz/dist/src/obniz/ObnizDevice.js:149:15)
    at Obniz.wsOnMessage (/Users/user/src/github.com/githubuser/proto-hydra/device/obniz/IoTGateway/node_modules/obniz/dist/src/obniz/ObnizConnection.js:437:26)
    at WebSocket.<anonymous> (/Users/user/src/github.com/githubuser/proto-hydra/device/obniz/IoTGateway/node_modules/obniz/dist/src/obniz/ObnizConnection.js:598:18) {
  code: 10,
  state: 62
}

/Users/user/src/github.com/githubuser/proto-hydra/device/obniz/IoTGateway/node_modules/obniz/dist/src/obniz/ObnizConnection.js:378
                        throw err;
                        ^

ObnizBleHciStateError: Remote User Terminated Connection  {"peripheralAddress":"b8804f58aa42"}
    at NobleBindings.onDisconnComplete (/Users/user/src/github.com/githubuser/proto-hydra/device/obniz/IoTGateway/node_modules/obniz/dist/src/obniz/libs/embeds/bleHci/protocol/central/bindings.js:189:27)
    at Hci.emit (/Users/user/src/github.com/githubuser/proto-hydra/device/obniz/IoTGateway/node_modules/eventemitter3/index.js:203:33)
    at Hci.onHciEventData (/Users/user/src/github.com/githubuser/proto-hydra/device/obniz/IoTGateway/node_modules/obniz/dist/src/obniz/libs/embeds/bleHci/protocol/hci.js:888:18)
    at Hci.onSocketData (/Users/user/src/github.com/githubuser/proto-hydra/device/obniz/IoTGateway/node_modules/obniz/dist/src/obniz/libs/embeds/bleHci/protocol/hci.js:954:18)
    at ObnizBLEHci.notified (/Users/user/src/github.com/githubuser/proto-hydra/device/obniz/IoTGateway/node_modules/obniz/dist/src/obniz/libs/embeds/bleHci/hci.js:69:22)
    at ObnizBLE.notifyFromObniz (/Users/user/src/github.com/githubuser/proto-hydra/device/obniz/IoTGateway/node_modules/obniz/dist/src/obniz/libs/embeds/bleHci/ble.js:122:22)
    at Obniz._notifyToModule (/Users/user/src/github.com/githubuser/proto-hydra/device/obniz/IoTGateway/node_modules/obniz/dist/src/obniz/ObnizComponents.js:271:37)
    at Obniz._notifyToModule (/Users/user/src/github.com/githubuser/proto-hydra/device/obniz/IoTGateway/node_modules/obniz/dist/src/obniz/ObnizDevice.js:149:15)
    at Obniz.wsOnMessage (/Users/user/src/github.com/githubuser/proto-hydra/device/obniz/IoTGateway/node_modules/obniz/dist/src/obniz/ObnizConnection.js:437:26)
    at WebSocket.<anonymous> (/Users/user/src/github.com/githubuser/proto-hydra/device/obniz/IoTGateway/node_modules/obniz/dist/src/obniz/ObnizConnection.js:598:18) {
  code: 10,
  state: 19
}

何か回避策はありますでしょうか？

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