293 lines
|
10.599kb
| 1 |
// |
|
| 2 |
// bluetoothSerial.swift |
|
| 3 |
// USB Meter |
|
| 4 |
// |
|
| 5 |
// Created by Bogdan Timofte on 17/03/2020. |
|
| 6 |
// Copyright © 2020 Bogdan Timofte. All rights reserved. |
|
| 7 |
// |
|
| 8 |
// https://github.com/hoiberg/HM10-BluetoothSerial-iOS |
|
| 9 |
import CoreBluetooth |
|
| 10 | ||
| 11 |
final class BluetoothSerial : NSObject, ObservableObject {
|
|
| 12 | ||
| 13 |
enum AdministrativeState {
|
|
| 14 |
case down |
|
| 15 |
case up |
|
| 16 |
} |
|
| 17 |
enum OperationalState: Int, Comparable {
|
|
| 18 |
case peripheralNotConnected |
|
| 19 |
case peripheralConnectionPending |
|
| 20 |
case peripheralConnected |
|
| 21 |
case peripheralReady |
|
| 22 | ||
| 23 |
static func < (lhs: OperationalState, rhs: OperationalState) -> Bool {
|
|
| 24 |
return lhs.rawValue < rhs.rawValue |
|
| 25 |
} |
|
| 26 |
} |
|
| 27 | ||
| 28 |
private var administrativeState = AdministrativeState.down |
|
| 29 |
private var operationalState = OperationalState.peripheralNotConnected {
|
|
| 30 |
didSet {
|
|
| 31 |
delegate?.opertionalStateChanged(to: operationalState) |
|
| 32 |
} |
|
| 33 |
} |
|
| 34 | ||
| 35 |
var macAddress: MACAddress |
|
| 36 |
private var manager: CBCentralManager |
|
| 37 |
private var radio: BluetoothRadio |
|
| 38 |
@Published var RSSI: Int |
|
| 39 | ||
| 40 |
private var expectedResponseLength = 0 |
|
| 41 |
private var wdTimer: Timer? |
|
| 42 | ||
| 43 |
var peripheral: CBPeripheral |
|
| 44 | ||
| 45 |
/// The characteristic 0xFFE1 we need to write to, of the connectedPeripheral |
|
| 46 |
private var writeCharacteristic: CBCharacteristic? |
|
| 47 | ||
| 48 |
private var buffer = Data() |
|
| 49 | ||
| 50 |
weak var delegate: SerialPortDelegate? |
|
| 51 | ||
| 52 |
init( peripheral: CBPeripheral, radio: BluetoothRadio, with macAddress: MACAddress, managedBy manager: CBCentralManager, RSSI: Int ) {
|
|
| 53 | ||
| 54 |
self.peripheral = peripheral |
|
| 55 |
self.macAddress = macAddress |
|
| 56 |
self.radio = radio |
|
| 57 |
self.manager = manager |
|
| 58 |
self.RSSI = RSSI |
|
| 59 |
Timer.scheduledTimer(withTimeInterval: 3, repeats: true, block: {_ in
|
|
| 60 |
if peripheral.state == .connected {
|
|
| 61 |
peripheral.readRSSI() |
|
| 62 |
} |
|
| 63 |
}) |
|
| 64 |
super.init() |
|
| 65 |
peripheral.delegate = self |
|
| 66 |
} |
|
| 67 | ||
| 68 |
func connect() {
|
|
| 69 |
administrativeState = .up |
|
| 70 |
if operationalState < .peripheralConnected {
|
|
| 71 |
operationalState = .peripheralConnectionPending |
|
| 72 |
track("Connect caled")
|
|
| 73 |
manager.connect(peripheral, options: nil) |
|
| 74 |
} else {
|
|
| 75 |
track("Peripheral allready connected: \(operationalState)")
|
|
| 76 |
} |
|
| 77 |
} |
|
| 78 | ||
| 79 |
func disconnect() {
|
|
| 80 |
if operationalState >= .peripheralConnected {
|
|
| 81 |
manager.cancelPeripheralConnection(peripheral) |
|
| 82 |
buffer.removeAll() |
|
| 83 |
} |
|
| 84 |
} |
|
| 85 | ||
| 86 |
/** |
|
| 87 |
Send data |
|
| 88 | ||
| 89 |
- parameter data: Data to be sent. |
|
| 90 |
- parameter expectedResponseLength: Optional If message sent require a respnse the length for that response must be provideed. Incomming data will be buffered before calling delegate.didReceiveData |
|
| 91 |
*/ |
|
| 92 |
func write(_ data: Data, expectedResponseLength: Int = 0) {
|
|
| 93 |
//track("\(self.expectedResponseLength)")
|
|
| 94 |
//track(data.hexEncodedStringValue) |
|
| 95 |
guard operationalState == .peripheralReady else {
|
|
| 96 |
track("Guard: \(operationalState)")
|
|
| 97 |
return |
|
| 98 |
} |
|
| 99 |
guard self.expectedResponseLength == 0 else {
|
|
| 100 |
track("Guard: \(self.expectedResponseLength)")
|
|
| 101 |
return |
|
| 102 |
} |
|
| 103 | ||
| 104 |
self.expectedResponseLength = expectedResponseLength |
|
| 105 | ||
| 106 |
// track("Sending...")
|
|
| 107 |
switch radio {
|
|
| 108 |
case .BT18 : |
|
| 109 |
peripheral.writeValue(data, for: writeCharacteristic!, type: .withoutResponse) |
|
| 110 |
case .PW0316 : |
|
| 111 |
peripheral.writeValue(data, for: writeCharacteristic!, type: .withResponse) |
|
| 112 |
default: |
|
| 113 |
track("Radio \(radio) Not Implemented!")
|
|
| 114 |
} |
|
| 115 |
// track("Sent!")
|
|
| 116 |
if self.expectedResponseLength != 0 {
|
|
| 117 |
setWDT() |
|
| 118 |
} |
|
| 119 |
} |
|
| 120 | ||
| 121 |
func connectionEstablished () {
|
|
| 122 |
track("")
|
|
| 123 |
operationalState = .peripheralConnected |
|
| 124 |
peripheral.discoverServices(BluetoothRadioServicesUUIDS[radio]) |
|
| 125 |
} |
|
| 126 | ||
| 127 |
func connectionClosed () {
|
|
| 128 |
track("")
|
|
| 129 |
operationalState = .peripheralNotConnected |
|
| 130 |
expectedResponseLength = 0 |
|
| 131 |
writeCharacteristic = nil |
|
| 132 |
} |
|
| 133 | ||
| 134 |
func setWDT() {
|
|
| 135 |
wdTimer?.invalidate() |
|
| 136 |
wdTimer = Timer.scheduledTimer(withTimeInterval: 10, repeats: false, block: {_ in
|
|
| 137 |
track("Response timeout. Expected: \(self.expectedResponseLength) - buffer: \(self.buffer.count)")
|
|
| 138 |
self.expectedResponseLength = 0 |
|
| 139 |
self.disconnect() |
|
| 140 |
}) |
|
| 141 |
} |
|
| 142 | ||
| 143 |
} |
|
| 144 | ||
| 145 |
// MARK: CBPeripheralDelegate |
|
| 146 |
extension BluetoothSerial : CBPeripheralDelegate {
|
|
| 147 | ||
| 148 |
// MARK: didReadRSSI |
|
| 149 |
func peripheral(_ peripheral: CBPeripheral, didReadRSSI RSSI: NSNumber, error: Error?) {
|
|
| 150 |
if error != nil {
|
|
| 151 |
track( "Error: \(error!)" ) |
|
| 152 |
} |
|
| 153 |
self.RSSI = RSSI.intValue |
|
| 154 |
} |
|
| 155 | ||
| 156 |
// MARK: didDiscoverServices |
|
| 157 |
func peripheral(_ peripheral: CBPeripheral, didDiscoverServices error: Error?) {
|
|
| 158 |
track("\(String(describing: peripheral.services))")
|
|
| 159 |
if error != nil {
|
|
| 160 |
track( "Error: \(error!)" ) |
|
| 161 |
} |
|
| 162 |
switch radio {
|
|
| 163 |
case .BT18: |
|
| 164 |
// discover the 0xFFE1 characteristic for all services (though there should only be one(service)) |
|
| 165 |
for service in peripheral.services! {
|
|
| 166 |
switch service.uuid {
|
|
| 167 |
case CBUUID(string: "FFE0"): |
|
| 168 |
// check whether the characteristic we're looking for (0xFFE1) is present - just to be sure |
|
| 169 |
peripheral.discoverCharacteristics([CBUUID(string: "FFE1")], for: service) |
|
| 170 |
default: |
|
| 171 |
track ("Unexpected service discovered: '\(service)'")
|
|
| 172 |
} |
|
| 173 |
} |
|
| 174 |
case .PW0316: |
|
| 175 |
for service in peripheral.services! {
|
|
| 176 |
//track("\(service.uuid)")
|
|
| 177 |
switch service.uuid {
|
|
| 178 |
case CBUUID(string: "FFE0"): |
|
| 179 |
//track("\(service.uuid)")
|
|
| 180 |
// check whether the characteristic we're looking for (0xFFE4) is present - just to be sure |
|
| 181 |
peripheral.discoverCharacteristics([CBUUID(string: "FFE4")], for: service) |
|
| 182 |
break |
|
| 183 |
case CBUUID(string: "FFE5"): |
|
| 184 |
//track("\(service.uuid)")
|
|
| 185 |
// check whether the characteristic we're looking for (0xFFE9) is present - just to be sure |
|
| 186 |
peripheral.discoverCharacteristics([CBUUID(string: "FFE9")], for: service) |
|
| 187 |
default: |
|
| 188 |
track ("Unexpected service discovered: '\(service)'")
|
|
| 189 |
} |
|
| 190 |
} |
|
| 191 |
break; |
|
| 192 |
default: |
|
| 193 |
track("Radio \(radio) Not Implemented!")
|
|
| 194 |
} |
|
| 195 |
} |
|
| 196 | ||
| 197 |
// MARK: didDiscoverCharacteristicsFor |
|
| 198 |
func peripheral(_ peripheral: CBPeripheral, didDiscoverCharacteristicsFor service: CBService, error: Error?) {
|
|
| 199 |
if error != nil {
|
|
| 200 |
track( "Error: \(error!)" ) |
|
| 201 |
} |
|
| 202 |
track("\(String(describing: service.characteristics))")
|
|
| 203 |
switch radio {
|
|
| 204 |
case .BT18: |
|
| 205 |
// check whether the characteristic we're looking for (0xFFE1) is present - just to be sure |
|
| 206 |
for characteristic in service.characteristics! {
|
|
| 207 |
//track(characteristic.debugDescription) |
|
| 208 |
switch characteristic.uuid {
|
|
| 209 |
case CBUUID(string: "FFE1"): |
|
| 210 |
// subscribe to this value (so we'll get notified when there is serial data for us..) |
|
| 211 |
peripheral.setNotifyValue(true, for: characteristic) |
|
| 212 |
// keep a reference to this characteristic so we can write to it |
|
| 213 |
writeCharacteristic = characteristic |
|
| 214 |
// Change State |
|
| 215 |
operationalState = .peripheralReady |
|
| 216 |
default: |
|
| 217 |
track ("Unexpected characteristic discovered: '\(characteristic)'")
|
|
| 218 |
} |
|
| 219 |
} |
|
| 220 |
case .PW0316: |
|
| 221 |
for characteristic in service.characteristics! {
|
|
| 222 |
switch characteristic.uuid {
|
|
| 223 |
case CBUUID(string: "FFE9"): //TX |
|
| 224 |
//track("characteristic FFE9: \(characteristic.properties & CBCharacteristicProperties.write)")
|
|
| 225 |
writeCharacteristic = characteristic |
|
| 226 |
operationalState = .peripheralReady |
|
| 227 |
case CBUUID(string: "FFE4"): //RX |
|
| 228 |
peripheral.setNotifyValue(true, for: characteristic) |
|
| 229 |
//track("characteristic FFE4: \(characteristic.properties)")
|
|
| 230 |
default: |
|
| 231 |
track ("Unexpected characteristic discovered: '\(characteristic)'")
|
|
| 232 |
} |
|
| 233 | ||
| 234 |
} |
|
| 235 |
break; |
|
| 236 |
default: |
|
| 237 |
track("Radio \(radio) Not Implemented!")
|
|
| 238 |
} |
|
| 239 |
} |
|
| 240 | ||
| 241 |
// MARK: didUpdateValueFor |
|
| 242 |
func peripheral(_ peripheral: CBPeripheral, didUpdateValueFor characteristic: CBCharacteristic, error: Error?) {
|
|
| 243 |
// track("")
|
|
| 244 |
if error != nil {
|
|
| 245 |
track( "Error: \(error!)" ) |
|
| 246 |
} |
|
| 247 |
buffer.append( characteristic.value ?? Data() ) |
|
| 248 |
// track("\n\(buffer.hexEncodedStringValue)")
|
|
| 249 |
switch buffer.count {
|
|
| 250 |
case let x where x < expectedResponseLength: |
|
| 251 |
setWDT() |
|
| 252 |
//track("buffering")
|
|
| 253 |
break; |
|
| 254 |
case let x where x == expectedResponseLength: |
|
| 255 |
//track("buffer ready")
|
|
| 256 |
wdTimer?.invalidate() |
|
| 257 |
expectedResponseLength = 0 |
|
| 258 |
delegate?.didReceiveData(buffer) |
|
| 259 |
buffer.removeAll() |
|
| 260 |
case let x where x > expectedResponseLength: |
|
| 261 |
// MARK: De unde stim că asta a fost tot? Probabil o deconectare ar rezolva problema |
|
| 262 |
wdTimer?.invalidate() |
|
| 263 |
expectedResponseLength = 0 |
|
| 264 |
buffer.removeAll() |
|
| 265 |
track("Buffer Overflow")
|
|
| 266 |
default: |
|
| 267 |
track("This is not possible!")
|
|
| 268 |
} |
|
| 269 |
} |
|
| 270 | ||
| 271 |
func peripheral(_ peripheral: CBPeripheral, didWriteValueFor characteristic: CBCharacteristic, error: Error?) {
|
|
| 272 |
if error != nil { track( "Error: \(error!)" ) }
|
|
| 273 |
} |
|
| 274 | ||
| 275 |
func peripheralIsReady(toSendWriteWithoutResponse peripheral: CBPeripheral) {
|
|
| 276 |
//track("")
|
|
| 277 |
} |
|
| 278 | ||
| 279 |
} |
|
| 280 | ||
| 281 |
// MARK: SerialPortDelegate |
|
| 282 |
protocol SerialPortDelegate: AnyObject {
|
|
| 283 |
// MARK: State Changed |
|
| 284 |
func opertionalStateChanged( to newOperationalState: BluetoothSerial.OperationalState ) |
|
| 285 |
// MARK: Data was received |
|
| 286 |
func didReceiveData(_ data: Data) |
|
| 287 |
} |
|
| 288 | ||
| 289 |
// MARK: SerialPortDelegate Optionals |
|
| 290 |
extension SerialPortDelegate {
|
|
| 291 |
} |
|
| 292 | ||
| 293 |