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5.3.2. Checking Synchronization with the Access Point
When performing data communication with a wireless communication device, use the RF.Synchronize method
to check whether synchronization with the access point has been obtained.
The following is a list of possible reasons why it may not be possible to obtain synchronization with the access
point.
(1) The wireless communication device is currently open.
Several seconds are required to obtain synchronization with the access point after opening the wireless
communication device.
Furthermore, when using DHCP, there are times when several tens of seconds are required to obtain the
IP after connecting to the network.
(2) When the wireless device is moved from the current access point to the next access point during roaming
(3) When the wireless device is moved outside the radio-wave area covered by the access point.
(4) When the wireless device is moved to a location where an obstruction prevents wireless communication
with the access point.
- BHT-200-CE 1
- Introduction 3
- Contents 4
- 1. Development Environment 7
- 2. Development Procedure 8
- 3. Device Control 10
- 4. Barcode Reading 11
- 5. Wireless Communication 15
- 6. Backlight 23
- 7. Beeper, Vibrator 27
- 8. Battery Information 29
- 9. Keyboard 30
- 10. LED 36
- 11. Power Management 38
- 12. Updating the OS 40
- 13. Status Display 41
- 14. System Information 42
- 15. Data Communication 43
- 16. Namespaces 44
- DNWA.BHTCL Namespace 45
- DNWA.Exception Namepsace 46
- 17.26. Display 72
- 17.27. Display.Settings 73
- 18. Members 84
- Scanner 86
- MAX_BAR_LEN 87
- MAX_2DCODE_LEN 87
- ALL_BUFFER 88
- Sub-code no 104
- PortOpen 115
- InBufferCount 116
- InBufferType 117
- LastCount 119
- LastType 121
- LastCodeInfo 122
- LastCodeNum 123
- As Integer, _ 125
- - 124 126
- ￭ Note 126
- As Integer 127
- GetChkDigit 129
- Dispose 137
- [Ex.] Set the 2 143
- DecodeLevel 145
- MinDigitITF 146
- MinDigitSTF 147
- MinDigitNW7 148
- Reverse 150
- ScanMode 151
- OptionData 152
- EN_MARKER 153
- EN_SCAN_MODE 154
- ExistingBatteries 157
- Battery 159
- Voltage 162
- Chemistry 164
- EN_CHARGE 165
- EN_LEVEL 166
- EN_CHEMISTRY 167
- Backlight 169
- [Ex.] Turn ON the backlight 170
- EN_STATUS 171
- OnTimeBattery 173
- OnTimeAC 174
- CtrlKey 175
- Brightness 177
- PowerSave 178
- [C#] LED MyLED = new LED(); 180
- [Ex.] Turn ON the blue LED 183
- EN_DEVICE 184
- EN_COLOR 185
- EN_CTRL 186
- EN_USAGE 187
- [VB] MyBeep.OnTime = 10 193
- [C#] MyBeep.OnTime = 10; 193
- OffTime 194
- Frequency 195
- [VB] MyBeep.Count = 5 196
- [C#] MyBeep.Count = 5; 196
- VolumeKey 201
- VolumeTap 202
- VolumeHalfKey 203
- OnOffLaserKey 204
- OnOffTrgKey 205
- EN_VOLUME 207
- EN_ON_OFF 208
- [C#] RF MyRf = new RF(); 210
- OpenMode 211
- - 211 213
- [VB] MyRf.Open = True 214
- [C#] MyRf.Open = true; 214
- Controller 215
- EditMode 217
- SelectedProfile 218
- - 217 219
- Synchronize 221
- - 220 222
- EN_OPEN_MODE 223
- EN_CONTROLLER 224
- EN_EDIT_MODE 225
- Profile 228
- InfraMode 230
- Priority 231
- Authentication 232
- Encryption 233
- EAP8021x 234
- PreSharedKey 236
- KeyIndex 237
- Registered 239
- - 238 240
- - 240 242
- - 242 244
- EN_AUTHENTICATION 246
- EN_EAP8021X 247
- EN_ENCRYPTION 248
- EN_INFRA_MODE 249
- DestMACAddress 253
- Version 254
- FWVersion 255
- HWVersion 256
- MACAddress 257
- EN_POWERSAVE 260
- TransmitKey 263
- Strength 265
- [Ex.] Acquire the beacon 266
- EN_LINE_QUALITY 268
- RateKbps 271
- Channel 272
- EN_RATE 274
- - 275 277
- ShiftMode 279
- InputMethod 281
- PwrDownTime 282
- AllowChangeIM 283
- KeyboardType 284
- HandleStatus 285
- EN_SHIFT_MODE 286
- EN_MX_MODE 287
- EN_INPUT_METHOD 288
- EN_CHANGE_IM 289
- EN_KEYBOARD_TYPE 290
- OSVersion 293
- MachineName 294
- MachineNumber 295
- SerialNumber 296
- RAMSize 297
- ROMSize 298
- Shutdown 300
- - 299 301
- EN_SHUTDOWN_MODE 302
- StandbyTime 304
- AutoPowerOffBattery 305
- AutoPowerOffExt 306
- EnableSuspendSlotX (X=0,1) 307
- CPUClock 308
- EN_SUSPEND 309
- EN_CPU_CLOCK 310
- ShiftKey 313
- Standby 315
- Wireless 316
- Alphabet 318
- - 318 320
- 18.26. Display 320
- - 319 321
- 18.27. Display.Settings 321
- SysModification 323
- FileName 324
- Execute 326
- - 325 327
- EN_MODE 328
- [Ex.] Saving the registry 330
- [VB] Registry.Save 330
- [C#] Registry.Save(); 330
- CommSerial 332
- DEFAULT_PORT 333
- WaitEvent 334
- SignaledEvent 335
- OutBufferCount 337
- [VB] MyComm.Port = 1 339
- [C#] MyComm.Port = 1; 339
- - 341 343
- - 343 345
- EN_EVENT 348
- FileTransfer 351
- StopBits 355
- TransferringEventInterval 357
- FileCount 359
- AddFile 360
- ClearFile 361
- [Ex.] Receive a file 362
- [VB] MyFileTransfer.Input() 362
- [Ex.] Send a file 363
- [VB] MyFileTransfer.Output() 363
- [VB] MyFileTransfer.Abort() 364
- OnTransferring 367
- EN_BAUD 368
- EN_PARITY 369
- EN_STOPBITS 370
- EN_RESULT 372
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