Created
January 24, 2020 22:31
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BLE Arduino Test
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| var noble = require('@abandonware/noble'); | |
| var deviceInfoUUID = '180a'; | |
| var bleServiceUUID = process.argv[2].toLowerCase(); // 'dfb0' or 'ffe0'; | |
| var serialPortCharacteristicUUID = process.argv[3].toLowerCase(); // 'dfb1', or 'ffe1'; | |
| var serialPortCharacteristic = null; | |
| var found = false; | |
| noble.on('stateChange', function(state) { | |
| if (state === 'poweredOn') { | |
| noble.startScanning(); | |
| } else { | |
| noble.stopScanning(); | |
| } | |
| }); | |
| noble.on('discover', function(peripheral) { | |
| peripheral.connect(function(error) { | |
| console.log('connected to peripheral: ' + peripheral.uuid); | |
| peripheral.discoverServices([deviceInfoUUID, bleServiceUUID], function(error, services) { | |
| console.log('discovered the following services: ' + services.length); | |
| for (var serviceIndex in services) { | |
| var service = services[serviceIndex]; | |
| console.log('- ' + serviceIndex + ' uuid: ' + service.uuid); | |
| serialPortCharacteristic = null; | |
| service.discoverCharacteristics([], function(error, characteristics) { | |
| console.log(' + characteristics : ' + characteristics.length); | |
| for (var characteristicIndex in characteristics) { | |
| var characteristic = characteristics[characteristicIndex]; | |
| console.log(' ' + characteristicIndex + ' uuid: ' + characteristic.uuid); | |
| if ( characteristic.uuid === serialPortCharacteristicUUID ) { | |
| serialPortCharacteristic = characteristic; | |
| } | |
| } | |
| if ( !found && serialPortCharacteristic ) { | |
| found = true; | |
| var buf = new Buffer(10); | |
| for (var i = 0; i < 10; i++) { | |
| buf[i] = i + 1; | |
| } | |
| subscribe(); | |
| setInterval(() => { send(buf); }, 1000); | |
| } | |
| }); | |
| } | |
| }); | |
| }); | |
| }); | |
| function subscribe() { | |
| console.log('--- SUBSCRIBE ---') | |
| noble.stopScanning(); | |
| serialPortCharacteristic.on('data', function(data, isNotification) { | |
| console.log('--- read', isNotification, data.length, data); | |
| }); | |
| // No need to subscribe on ubuntu 16.04 LTS | |
| serialPortCharacteristic.subscribe(function(err) { | |
| console.log('--- subscribe'); | |
| }); | |
| } | |
| function send(writeBuf) { | |
| serialPortCharacteristic.write(writeBuf, false, function(err) { | |
| if (err) console.log(err); | |
| }); | |
| } |
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