aai-ant-plus
Version:
A node module for ANT+
222 lines • 10.4 kB
JavaScript
"use strict";
/*
* ANT+ profile: https://www.thisisant.com/developer/ant-plus/device-profiles/#526_tab
* Spec sheet: https://www.thisisant.com/resources/heart-rate-monitor/
*/
var __extends = (this && this.__extends) || (function () {
var 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 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 = require("./ant");
var Constants = Ant.Constants;
var Messages = Ant.Messages;
var HeartRateSensorState = /** @class */ (function () {
function HeartRateSensorState(deviceId) {
this.DeviceID = deviceId;
}
return HeartRateSensorState;
}());
var HeartRateScannerState = /** @class */ (function (_super) {
__extends(HeartRateScannerState, _super);
function HeartRateScannerState() {
return _super !== null && _super.apply(this, arguments) || this;
}
return HeartRateScannerState;
}(HeartRateSensorState));
var PageState;
(function (PageState) {
PageState[PageState["INIT_PAGE"] = 0] = "INIT_PAGE";
PageState[PageState["STD_PAGE"] = 1] = "STD_PAGE";
PageState[PageState["EXT_PAGE"] = 2] = "EXT_PAGE";
})(PageState || (PageState = {}));
var HeartRateSensor = /** @class */ (function (_super) {
__extends(HeartRateSensor, _super);
function HeartRateSensor(stick) {
var _this = _super.call(this, stick) || this;
_this.page = {
oldPage: -1,
pageState: PageState.INIT_PAGE,
};
_this.decodeDataCbk = _this.decodeData.bind(_this);
return _this;
}
HeartRateSensor.prototype.attach = function (channel, deviceID) {
_super.prototype.attach.call(this, channel, 'receive', deviceID, HeartRateSensor.deviceType, 0, 255, 8070);
this.state = new HeartRateSensorState(deviceID);
};
HeartRateSensor.prototype.decodeData = function (data) {
if (data.readUInt8(Messages.BUFFER_INDEX_CHANNEL_NUM) !== this.channel) {
return;
}
switch (data.readUInt8(Messages.BUFFER_INDEX_MSG_TYPE)) {
case Constants.MESSAGE_CHANNEL_BROADCAST_DATA:
case Constants.MESSAGE_CHANNEL_ACKNOWLEDGED_DATA:
case Constants.MESSAGE_CHANNEL_BURST_DATA:
if (this.deviceID === 0) {
this.write(Messages.requestMessage(this.channel, Constants.MESSAGE_CHANNEL_ID));
}
updateState(this, this.state, this.page, data);
break;
case Constants.MESSAGE_CHANNEL_ID:
this.deviceID = data.readUInt16LE(Messages.BUFFER_INDEX_MSG_DATA);
this.transmissionType = data.readUInt8(Messages.BUFFER_INDEX_MSG_DATA + 3);
this.state.DeviceID = this.deviceID;
break;
default:
break;
}
};
HeartRateSensor.deviceType = 120;
return HeartRateSensor;
}(Ant.AntPlusSensor));
exports.HeartRateSensor = HeartRateSensor;
var HeartRateScanner = /** @class */ (function (_super) {
__extends(HeartRateScanner, _super);
function HeartRateScanner(stick) {
var _this = _super.call(this, stick) || this;
_this.states = {};
_this.pages = {};
_this.decodeDataCbk = _this.decodeData.bind(_this);
return _this;
}
HeartRateScanner.prototype.scan = function () {
_super.prototype.scan.call(this, 'receive');
};
HeartRateScanner.prototype.decodeData = function (data) {
if (data.length <= (Messages.BUFFER_INDEX_EXT_MSG_BEGIN + 3) || !(data.readUInt8(Messages.BUFFER_INDEX_EXT_MSG_BEGIN) & 0x80)) {
console.log('wrong message format');
return;
}
var deviceId = data.readUInt16LE(Messages.BUFFER_INDEX_EXT_MSG_BEGIN + 1);
var deviceType = data.readUInt8(Messages.BUFFER_INDEX_EXT_MSG_BEGIN + 3);
if (deviceType !== HeartRateScanner.deviceType) {
return;
}
if (!this.states[deviceId]) {
this.states[deviceId] = new HeartRateScannerState(deviceId);
}
if (!this.pages[deviceId]) {
this.pages[deviceId] = { oldPage: -1, pageState: PageState.INIT_PAGE };
}
if (data.readUInt8(Messages.BUFFER_INDEX_EXT_MSG_BEGIN) & 0x40) {
if (data.readUInt8(Messages.BUFFER_INDEX_EXT_MSG_BEGIN + 5) === 0x20) {
this.states[deviceId].Rssi = data.readInt8(Messages.BUFFER_INDEX_EXT_MSG_BEGIN + 6);
this.states[deviceId].Threshold = data.readInt8(Messages.BUFFER_INDEX_EXT_MSG_BEGIN + 7);
}
}
switch (data.readUInt8(Messages.BUFFER_INDEX_MSG_TYPE)) {
case Constants.MESSAGE_CHANNEL_BROADCAST_DATA:
case Constants.MESSAGE_CHANNEL_ACKNOWLEDGED_DATA:
case Constants.MESSAGE_CHANNEL_BURST_DATA:
updateState(this, this.states[deviceId], this.pages[deviceId], data);
break;
default:
break;
}
};
HeartRateScanner.deviceType = 120;
return HeartRateScanner;
}(Ant.AntPlusScanner));
exports.HeartRateScanner = HeartRateScanner;
var TOGGLE_MASK = 0x80;
function updateState(sensor, state, page, data) {
var pageNum = data.readUInt8(Messages.BUFFER_INDEX_MSG_DATA);
if (page.pageState === PageState.INIT_PAGE) {
page.pageState = PageState.STD_PAGE; // change the state to STD_PAGE and allow the checking of old and new pages
// decode with pages if the page byte or toggle bit has changed
}
else if ((pageNum !== page.oldPage) || (page.pageState === PageState.EXT_PAGE)) {
page.pageState = PageState.EXT_PAGE; // set the state to use the extended page format
switch (pageNum & ~TOGGLE_MASK) {
case 1:
//decode the cumulative operating time
state.OperatingTime = data.readUInt8(Messages.BUFFER_INDEX_MSG_DATA + 1);
state.OperatingTime |= data.readUInt8(Messages.BUFFER_INDEX_MSG_DATA + 2) << 8;
state.OperatingTime |= data.readUInt8(Messages.BUFFER_INDEX_MSG_DATA + 3) << 16;
state.OperatingTime *= 2;
break;
case 2:
//decode the Manufacturer ID
state.ManId = data.readUInt8(Messages.BUFFER_INDEX_MSG_DATA + 1);
//decode the 4 byte serial number
state.SerialNumber = sensor.deviceID;
state.SerialNumber |= data.readUInt16LE(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(Messages.BUFFER_INDEX_MSG_DATA + 1);
state.SwVersion = data.readUInt8(Messages.BUFFER_INDEX_MSG_DATA + 2);
state.ModelNum = data.readUInt8(Messages.BUFFER_INDEX_MSG_DATA + 3);
break;
case 4:
//decode the previous heart beat measurement time
state.PreviousBeat = data.readUInt16LE(Messages.BUFFER_INDEX_MSG_DATA + 2);
break;
case 5:
state.IntervalAverage = data.readUInt8(Messages.BUFFER_INDEX_MSG_DATA + 1);
state.IntervalMax = data.readUInt8(Messages.BUFFER_INDEX_MSG_DATA + 2);
state.SessionAverage = data.readUInt8(Messages.BUFFER_INDEX_MSG_DATA + 3);
break;
case 6:
state.SupportedFeatures = data.readUInt8(Messages.BUFFER_INDEX_MSG_DATA + 2);
state.EnabledFeatures = data.readUInt8(Messages.BUFFER_INDEX_MSG_DATA + 3);
break;
case 7: {
var batteryLevel = data.readUInt8(Messages.BUFFER_INDEX_MSG_DATA + 1);
var batteryFrac = data.readUInt8(Messages.BUFFER_INDEX_MSG_DATA + 2);
var batteryStatus = data.readUInt8(Messages.BUFFER_INDEX_MSG_DATA + 3);
if (batteryLevel !== 0xFF) {
state.BatteryLevel = batteryLevel;
}
state.BatteryVoltage = (batteryStatus & 0x0F) + (batteryFrac / 256);
var batteryFlags = batteryStatus & 0x70;
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;
}
default:
break;
}
}
// decode the last four bytes of the HRM format, the first byte of this message is the channel number
DecodeDefaultHRM(state, data.slice(Messages.BUFFER_INDEX_MSG_DATA + 4));
page.oldPage = pageNum;
sensor.emit('hbdata', state);
sensor.emit('hbData', state);
}
function DecodeDefaultHRM(state, pucPayload) {
// decode the measurement time data (two bytes)
state.BeatTime = pucPayload.readUInt16LE(0);
// decode the measurement count data
state.BeatCount = pucPayload.readUInt8(2);
// decode the measurement count data
state.ComputedHeartRate = pucPayload.readUInt8(3);
}
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