ant-plus
Version:
A node module for ANT+
168 lines • 7.38 kB
JavaScript
;
/*
* ANT+ profile: https://www.thisisant.com/developer/ant-plus/device-profiles/#523_tab
* Spec sheet: https://www.thisisant.com/resources/bicycle-speed-and-cadence/
*/
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
Object.defineProperty(exports, "__esModule", { value: true });
var ant_1 = require("./ant");
var SpeedSensorState = /** @class */ (function () {
function SpeedSensorState(deviceID) {
this.DeviceID = deviceID;
}
return SpeedSensorState;
}());
var SpeedScanState = /** @class */ (function (_super) {
__extends(SpeedScanState, _super);
function SpeedScanState() {
return _super !== null && _super.apply(this, arguments) || this;
}
return SpeedScanState;
}(SpeedSensorState));
var SpeedSensor = /** @class */ (function (_super) {
__extends(SpeedSensor, _super);
function SpeedSensor() {
var _this = _super !== null && _super.apply(this, arguments) || this;
_this.wheelCircumference = 2.199; // default 70cm wheel
return _this;
}
SpeedSensor.prototype.setWheelCircumference = function (wheelCircumference) {
this.wheelCircumference = wheelCircumference;
};
SpeedSensor.prototype.attach = function (channel, deviceID) {
_super.prototype.attach.call(this, channel, 'receive', deviceID, SpeedSensor.deviceType, 0, 255, 8086);
this.state = new SpeedSensorState(deviceID);
};
SpeedSensor.prototype.updateState = function (deviceId, data) {
this.state.DeviceID = deviceId;
updateState(this, this.state, data);
};
SpeedSensor.deviceType = 0x7B;
return SpeedSensor;
}(ant_1.AntPlusSensor));
exports.SpeedSensor = SpeedSensor;
var SpeedScanner = /** @class */ (function (_super) {
__extends(SpeedScanner, _super);
function SpeedScanner() {
var _this = _super !== null && _super.apply(this, arguments) || this;
_this.wheelCircumference = 2.199; // default 70cm wheel
_this.states = {};
return _this;
}
SpeedScanner.prototype.deviceType = function () {
return SpeedSensor.deviceType;
};
SpeedScanner.prototype.setWheelCircumference = function (wheelCircumference) {
this.wheelCircumference = wheelCircumference;
};
SpeedScanner.prototype.createStateIfNew = function (deviceId) {
if (!this.states[deviceId]) {
this.states[deviceId] = new SpeedScanState(deviceId);
}
};
SpeedScanner.prototype.updateRssiAndThreshold = function (deviceId, rssi, threshold) {
this.states[deviceId].Rssi = rssi;
this.states[deviceId].Threshold = threshold;
};
SpeedScanner.prototype.updateState = function (deviceId, data) {
updateState(this, this.states[deviceId], data);
};
return SpeedScanner;
}(ant_1.AntPlusScanner));
exports.SpeedScanner = SpeedScanner;
var TOGGLE_MASK = 0x80;
function updateState(sensor, state, data) {
var pageNum = data.readUInt8(ant_1.Messages.BUFFER_INDEX_MSG_DATA);
switch (pageNum & ~TOGGLE_MASK) { //check the new pages and remove the toggle bit
case 1:
//decode the cumulative operating time
state.OperatingTime = data.readUInt8(ant_1.Messages.BUFFER_INDEX_MSG_DATA + 1);
state.OperatingTime |= data.readUInt8(ant_1.Messages.BUFFER_INDEX_MSG_DATA + 2) << 8;
state.OperatingTime |= data.readUInt8(ant_1.Messages.BUFFER_INDEX_MSG_DATA + 3) << 16;
state.OperatingTime *= 2;
break;
case 2:
//decode the Manufacturer ID
state.ManId = data.readUInt8(ant_1.Messages.BUFFER_INDEX_MSG_DATA + 1);
//decode the 4 byte serial number
state.SerialNumber = state.DeviceID;
state.SerialNumber |= data.readUInt16LE(ant_1.Messages.BUFFER_INDEX_MSG_DATA + 2) << 16;
state.SerialNumber >>>= 0;
break;
case 3:
//decode HW version, SW version, and model number
state.HwVersion = data.readUInt8(ant_1.Messages.BUFFER_INDEX_MSG_DATA + 1);
state.SwVersion = data.readUInt8(ant_1.Messages.BUFFER_INDEX_MSG_DATA + 2);
state.ModelNum = data.readUInt8(ant_1.Messages.BUFFER_INDEX_MSG_DATA + 3);
break;
case 4: {
var batteryFrac = data.readUInt8(ant_1.Messages.BUFFER_INDEX_MSG_DATA + 2);
var batteryStatus = data.readUInt8(ant_1.Messages.BUFFER_INDEX_MSG_DATA + 3);
state.BatteryVoltage = (batteryStatus & 0x0F) + (batteryFrac / 256);
var batteryFlags = (batteryStatus & 0x70) >>> 4;
switch (batteryFlags) {
case 1:
state.BatteryStatus = 'New';
break;
case 2:
state.BatteryStatus = 'Good';
break;
case 3:
state.BatteryStatus = 'Ok';
break;
case 4:
state.BatteryStatus = 'Low';
break;
case 5:
state.BatteryStatus = 'Critical';
break;
default:
state.BatteryVoltage = undefined;
state.BatteryStatus = 'Invalid';
break;
}
break;
}
case 5:
state.Motion = (data.readUInt8(ant_1.Messages.BUFFER_INDEX_MSG_DATA + 1) & 0x01) === 0x01;
break;
default:
break;
}
//get old state for calculating cumulative values
var oldSpeedTime = state.SpeedEventTime;
var oldSpeedCount = state.CumulativeSpeedRevolutionCount;
var speedEventTime = data.readUInt16LE(ant_1.Messages.BUFFER_INDEX_MSG_DATA + 4);
var speedRevolutionCount = data.readUInt16LE(ant_1.Messages.BUFFER_INDEX_MSG_DATA + 6);
if (speedEventTime !== oldSpeedTime) {
state.SpeedEventTime = speedEventTime;
state.CumulativeSpeedRevolutionCount = speedRevolutionCount;
if (oldSpeedTime > speedEventTime) { //Hit rollover value
speedEventTime += (1024 * 64);
}
if (oldSpeedCount > speedRevolutionCount) { //Hit rollover value
speedRevolutionCount += (1024 * 64);
}
var distance = sensor.wheelCircumference * (speedRevolutionCount - oldSpeedCount);
state.CalculatedDistance = distance;
//speed in m/sec
var speed = (distance * 1024) / (speedEventTime - oldSpeedTime);
if (!isNaN(speed)) {
state.CalculatedSpeed = speed;
sensor.emit('speedData', state);
}
}
}
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