zorro1996
commented
6 years ago const bleno = require("bleno"); const CALCULATOR_SERVICE_UUID = "ea87e794-ec03-11e8-8eb2-f2801f1b9fd1"; const ARGUMENT_1_UUID = "ea87ea50-ec03-11e8-8eb2-f2801f1b9fd1"; const ARGUMENT_2_UUID = "ea87eba4-ec03-11e8-8eb2-f2801f1b9fd1"; const RESULT_UUID = "ea87ecda-ec03-11e8-8eb2-f2801f1b9fd1";
class ArgumentCharacteristic extends bleno.Characteristic {
constructor(uuid, name) {
super({
uuid: uuid,
properties: ["write"],;
value: null,
descriptors: [
new bleno.Descriptor({
uuid: "2901",
value: name
})
]
});
this.argument = 0;
this.name = name;
}
onWriteRequest(data, offset, withoutResponse, callback) {
try {
if(data.length != 1) {
callback(this.RESULT_INVALID_ATTRIBUTE_LENGTH);
return;
}
this.argument = data.readUInt8();
console.log(Argument ${this.name} is now ${this.argument});
callback(this.RESULT_SUCCESS);
} catch (err) {
console.error(err);
callback(this.RESULT_UNLIKELY_ERROR);
}
}
}
class ResultCharacteristic extends bleno.Characteristic {
constructor(calcResultFunc) {
super({
uuid: RESULT_UUID,
properties: ["read"],
value: null,
descriptors: [
new bleno.Descriptor({
uuid: "2901",
value: "Calculation result"
})
]
});
this.calcResultFunc = calcResultFunc;
}
onReadRequest(offset, callback) {
try {
const result = this.calcResultFunc();
console.log(Returning result: ${result});
let data = new Buffer(1);
data.writeUInt8(result, 0);
callback(this.RESULT_SUCCESS, data);
} catch (err) {
console.error(err);
callback(this.RESULT_UNLIKELY_ERROR);
}
}
}
bleno.on("advertisingStart", err => { console.log("Configuring services...");
if(err) {
console.error(err);
return;
}
let argument1 = new ArgumentCharacteristic(ARGUMENT_1_UUID, "Argument 1");
let argument2 = new ArgumentCharacteristic(ARGUMENT_2_UUID, "Argument 2");
let result = new ResultCharacteristic(() => argument1.argument + argument2.argument);
let calculator = new bleno.PrimaryService({
uuid: CALCULATOR_SERVICE_UUID,
characteristics: [
argument1,
argument2,
result
]
});
bleno.setServices([calculator], err => {
if(err)
console.log(err);
else
console.log("Services configured");
});}); bleno.on("stateChange", state => { if (state === "poweredOn") {
bleno.startAdvertising("Calculator", [CALCULATOR_SERVICE_UUID], err => {
if (err) console.log(err);
});
} else {
console.log("Stopping...");
bleno.stopAdvertising();
} });
/home/pi/node_modules/bleno/lib/hci-socket/gatt.js:143 if (characteristic.properties.indexOf('read') !== -1) { ^
TypeError: Cannot read property 'indexOf' of undefined at Gatt.setServices (/home/pi/node_modules/bleno/lib/hci-socket/gatt.js:143:37) at BlenoBindings.setServices (/home/pi/node_modules/bleno/lib/hci-socket/bindings.js:53:14) at Bleno.setServices (/home/pi/node_modules/bleno/lib/bleno.js:208:18) at Bleno.bleno.Characteristic.bleno.Characteristic.bleno.Characteristic.bleno.on.err (/home/pi/blenoexample/LighControl/LightControlService.js:113:7) at emitOne (events.js:121:20) at Bleno.emit (events.js:211:7) at Bleno.onAdvertisingStart (/home/pi/node_modules/bleno/lib/bleno.js:166:8) at emitOne (events.js:116:13) at BlenoBindings.emit (events.js:211:7) at BlenoBindings.onAdvertisingStart (/home/pi/node_modules/bleno/lib/hci-socket/bindings.js:127:8)