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Chapter 2 – AT Commands
Multi-Tech Systems, Inc. SocketWireless Bluetooth AT Commands (S000360H) 26
SW22 Write PIO Direction
This command configures the direction of the PIOs.
Caution: This has to be done before using PIOs as outputs. Inputting 3.3Vdc into a PIO
assigned as output will permanently damage the module.
Format: ATSW22,<PIO#>,<PIO State>,<Store>
Parameters:
• PIO#: 3,6,7 (6 & 7 not user definable in MP mode, see notes below)
• PIO State:
0 = Input
1 = Output
• Store:
0 = Do Not Store
1 = Store Parameters in Flash
EXAMPLE:
TYPE: ATSW22,6,0,1<cr>
REPLY: <cr_lf>OK<cr_lf>
OR
<cr_lf>ERROR<cr_lf>
Notes:
Point-to-Point PIO Functionality
• PIO(2) Hard coded as output only. Indicates Bluetooth connection on Ch00.
• PIO(3) Hard coded as input only. High signal of > 1ms will interrupt to wake-up
CPU out of deep sleep mode if enabled.
• PIO(4) Hard coded as input only. Triple Purpose PIO. Used for resetting factory
defaults on power up and breaking out of Fast Data mode while Bluetooth
connected. Also, if strobed, will auto connect to last paired or last connected
device.
• PIO(5) Hard coded as output only. Strobes to indicate slave or master inquiry in
process.
• PIO(6) User Definable. Defaults as input.
• PIO(7) User Definable. Defaults as input. Can be used for flow control.
Multi-Point PIO Functionality
• PIO(2) Hard coded as output only. Indicates Bluetooth connection on Ch00.
• PIO(3) Hard coded as input only. Defaults as input, high signal of > 1ms will
interrupt to wake-up CPU out of deep sleep mode if enabled.
• PIO(4) Hard coded as input only. Triple Purpose PIO. Used for resetting factory
defaults on power up and breaking out of Fast Data mode while Bluetooth
connected. Also, if strobed, will auto connect to last paired or last connected
device.
• PIO(5) Hard coded as output only. Indicates Bluetooth connection on Ch01.
• PIO(6) User definable if no connection on Channel 2. Indicates Bluetooth
connection on Ch02.
• PIO(7) User definable if no connection on Channel 3. Indicates Bluetooth
connection on Ch03.
- AT Commands 1
- Reference Guide 1
- Table of Contents 3
- Chapter 1 – Introduction 5
- Changing Configuration 6
- Using Multi-Point Mode 8
- Multipoint Examples 9
- Multi-Point Test Scenarios 10
- Repeater Mode 12
- Chapter 2 - AT Commands 13
- URST Reset 14
- FRST Factory Reset 14
- SI Status Information 15
- Security Commands 19
- Set and Read Device Name 20
- RSN Read Service Name 21
- SP Set PIN 22
- OP Overwrite PIN 23
- Configuration Commands 24
- SW22 Write PIO Direction 26
- SW23 Write PIO Level 27
- SW26 Lock User Settings 29
- SW27 Write LED Rate 29
- SW29 Write PIN Lock Mode 30
- SW30 Write Deep Sleep Mode 30
- Inquiry Commands 31
- Connect as Master Commands 32
- DC Dial Channel 33
- DL Dial Last 34
- LAST Read Last Address 34
- MACLR Master Address Clear 35
- Connect As Slave Command 36
- Disconnect Commands 36
- About Command/Data Mode 37
- Data Mode Commands 37
- Utilities – Cancel Command 38
- Pairing Commands 39
- Low Power Modes Using Sniff 40
- SNIFF Enable Sniff 40
- SSNIFF Enable Auto Sniff 41
- CSNIFF Clear Sniff 41
- XSNIFF Exit Sniff Mode 41
- PARK Enable Park 42
- XPARK Exit Park 42
- Golden Receive Power Range 42
- RSSI Get RSSI Value 42
- LQ Get Link Quality 43
- Max Power Command 44
- Variable Storage Commands 45
- PIO Logic Commands 46
- Commands 47
- FTP Client 48
- DHFTP Dial Hang Up FTP 49
- FTPB FTP Browse 49
- FTP Push/Pull Commands 51
- FTP Server 52
- DOPP Dial OPP 53
- DHOPP Dial Hang Up OPP 53
- OPP Push/Pull Commands 54
- Chapter 4 – Examples 59
- From Power Up 60
- Headset Point-to-Point 60
- Headset Multipoint 60
- Example Client Applications 61
- Description Requires 69
- Appendix B – Responses 72
- Appendix C -- UUID Table 79
- Consumption 80
- Command Responses Comparison 81
- Abbreviations 85
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