Digi XBee3 - Solution

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Troubleshooting Socket leaks

Digi XBee3 Cellular LTE-M Global Smart Modem User Guide

167

Solution

To recover the leaked sockets and make them available again in all modes:

n Perform a reset of the cellular component (hard or soft).

or

n Send an AT!R—see !R (Modem Reset).

Table of Contents

Default Chapter1
- Syntax Error at Line1
  - Customer Support2
  - Table of Contents3
Digi Xbee3 Cellular LTE-M Global Smart Modem User Guide10
- Applicable Firmware and Hardware11
- SIM Cards11
Getting Started with the Xbee Smart Modem Development Kit12
- Identify the Kit Contents13
- Connect the Hardware14
- XBIB-U-DEV Reference16
- Cellular Service17
- Configure the Device Using XCTU18
- Connect to the ELIZA Server21
  - Debugging22
- Connect to the Echo Server23
  - Debugging24
- Connect to the Daytime Server25
  - Debugging26
- Get Started with Micropython26
- More Examples32
- Software Libraries48
Technical Specifications50
- Interface and Hardware Specifications51
- Cellular RF Characteristics51
- Bluetooth RF Characteristics51
- Cellular Networking Specifications51
- Power Requirements52
- Power Consumption53
- Electrical Specifications54
- Regulatory Approvals55
Hardware56
- Mechanical Drawings57
- Pin Signals57
  - Pin Connection Recommendations59
- Rssi Pwm59
- SIM Card59
- The Associate LED60
Antenna Recommendations61
- Antenna Placement62
Design Recommendations63
- Cellular Component Firmware Updates64
- USB Direct Design64
- Power Supply Considerations64
- Minimum Connection Diagram65
- Heat Considerations and Testing65
Cellular Connection Process67
- Connecting68
  - Cellular Network68
  - Data Network Connection68
- Data Communication with Remote Servers (TCP/UDP)68
- Disconnecting68
Modes70
- Select an Operating Mode71
- Transparent Operating Mode72
- API Operating Mode72
- Bypass Operating Mode72
- USB Direct Mode73
  - Configure the Data Pins73
  - Enable USB Direct Mode73
- Command Mode74
- Micropython Mode76
Sleep Modes77
- About Sleep Modes78
- Normal Mode78
- Pin Sleep Mode78
- Cyclic Sleep Mode78
- Cyclic Sleep with Pin Wake up Mode78
- SPI Mode and Sleep Pin Functionality78
- The Sleep Timer79
- Micropython Sleep Behavior79
Power Saving Features80
- Airplane Mode81
- Power Saving Mode (PSM)81
- PSM Behavior81
- Deep Sleep Mode81
Serial Communication82
- Serial Interface83
- Serial Data83
- UART Data Flow83
- Serial Buffers84
- CTS Flow Control84
- RTS Flow Control84
- Enable UART or SPI Ports84
SPI Operation86
- SPI Communications87
- Full Duplex Operation88
- Low Power Operation89
- Select the SPI Port89
- Force UART Operation90
- Data Format90
File System91
- Overview of the File System92
- XCTU Interface93
- Encrypt Files93
Socket Behavior95
- Supported Sockets95
- Socket Timeouts95
- Socket Limits in API Mode95
- Enable Incoming TCP Sockets in API Mode95
- API Mode Behavior for Outgoing TCP and SSL Connections95
- API Mode Behavior for Outgoing UDP Data96
- API Mode Behavior for Incoming TCP Connections96
- API Mode Behavior for Incoming UDP Data97
- Transparent Mode Behavior for Outgoing TCP and SSL Connections97
- Transparent Mode Behavior for Outgoing UDP Data97
- Transparent Mode Behavior for Incoming TCP Connections98
- Transparent Mode Behavior for Incoming UDP Connections98
Transport Layer Security (TLS)99
TLS at Commands100
- Transparent Mode and TLS101
- API Mode and TLS101
- Key Formats101
- Certificate Formats101
- Certificate Limitations101
- Cipher Suites102
- Server Name Indication (SNI)102
- AT Commands103
- Special Commands104
  - AC (Apply Changes)104
  - FR (Force Reset)104
  - RE (Restore Defaults)104
  - WR (Write)104
- Cellular Commands105
  - PH (Phone Number)105
  - S# (ICCID)105
  - IM (Imei)105
  - MN (Operator)105
  - MV (Modem Firmware Version)106
  - DB (Cellular Signal Strength)106
  - AN (Access Point Name)106
  - CP (Carrier Profile)106
  - AM (Airplane Mode)107
- Network Commands107
  - IP (IP Protocol)107
  - TL (SSL/TLS Protocol Version)108
  - SSL/TLS Profile 0)108
  - SSL/TLS Profile 1)108
  - SSL/TLS Profile 2)109
  - TM (IP Client Connection Timeout)109
  - TS (IP Server Connection Timeout)109
  - DO (Device Options)109
  - EQ (Remote Manager FQDN)110
- Addressing Commands110
  - SH (Serial Number High)111
  - SL (Serial Number Low)111
  - MY (Module IP Address)111
  - P# (Destination Phone Number)111
  - N1 (DNS Address)111
  - N2 (DNS Address)112
  - DL (Destination Address)112
  - OD (Operating Destination Address)112
  - DE (Destination Port)112
  - C0 (Source Port)113
  - LA (Lookup IP Address of FQDN)113
- Serial Interfacing Commands113
  - BD (Baud Rate)113
  - NB (Parity)114
  - SB (Stop Bits)114
  - RO (Packetization Timeout)115
  - TD (Text Delimiter)115
  - FT (Flow Control Threshold)115
  - AP (API Enable)115
- I/O Settings Commands116
  - D0 (Dio0/Ad0)116
  - D1 (Dio1/Ad1)116
  - D2 (Dio2/Ad2)117
  - D3 (Dio3/Ad3)117
  - D4 (Dio4)118
  - D5 (Dio5/Associated_Indicator)118
  - D6 (Dio6/Rts)118
  - D7 (Dio7/Cts)119
  - D8 (Dio8/Sleep_Request)119
  - P0 (DIO10/PWM0 Configuration)120
  - P1 (DIO11/PWM1 Configuration)121
  - P2 (DIO12 Configuration)121
  - P3 (Dio13/Dout)122
  - P4 (Dio14/Din)122
  - PD (Pull Direction)122
  - PR (Pull-Up/Down Resistor Enable)123
  - M0 (PWM0 Duty Cycle)124
- I/O Sampling Commands124
  - TP (Temperature)124
  - IS (Force Sample)124
- Sleep Commands125
  - SM (Sleep Mode)125
  - SP (Sleep Period)126
  - ST (Wake Time)126
  - PA (Requested Active Timer)126
  - PU (Requested Tracking Area Update Timer)126
- Command Mode Options127
  - CC (Command Sequence Character)127
  - CT (Command Mode Timeout)127
  - CN (Exit Command Mode)127
  - GT (Guard Times)128
- Micropython Commands128
  - PS (Python Startup)128
  - PY (Micropython Command)128
- Firmware Version/Information Commands129
  - VR (Firmware Version)129
  - VL (Verbose Firmware Version)129
  - HV (Hardware Version)130
  - AI (Association Indication)130
  - HS (Hardware Series)130
  - CK (Configuration CRC)131
- Diagnostic Interface Commands131
  - DI (Remote Manager Indicator)131
  - CI (Protocol/Connection Indication)131
- Execution Commands133
  - NR (Network Reset)133
  - R (Modem Reset)133
- File System Commands133
  - Error Responses134
  - ATFS (File System)134
  - Atfs Pwd134
  - ATFS CD Directory134
  - ATFS MD Directory135
  - ATFS LS [Directory]135
  - ATFS PUT Filename135
  - ATFS XPUT Filename135
  - ATFS HASH Filename135
  - ATFS GET Filename135
  - ATFS MV Source_Path Dest_Path135
  - ATFS RM File_Or_Directory136
  - Atfs Info136
  - ATFS FORMAT Confirm136
Operate in API Mode137
- API Mode Overview138
- Use the AP Command to Set the Operation Mode138
- API Frame Format138
  - API Operation (AP Parameter = 1)138
  - API Operation with Escaped Characters (AP Parameter = 2)139
API Frames143
- AT Command - 0X08143
- Transmit (TX) SMS - 0X1F144
- Transmit (TX) Request: Ipv4 - 0X20145
- Tx Request with TLS Profile - 0X23147
- AT Command Response - 0X88149
- Transmit (TX) Status - 0X89150
- Modem Status - 0X8A152
- Receive (RX) Packet: SMS - 0X9F153
- Receive (RX) Packet: Ipv4 - 0Xb0154
Configure the Xbee Smart Modem Using Digi Remote Manager155
- Create a Remote Manager Account156
- Get the Xbee Smart Modem IMEI Number156
- Add a Xbee Smart Modem to Remote Manager156
- Update the Firmware157
- Update the Firmware Using Web Services157
  - Example: Update the Xbee Firmware Synchronously with Python 3.0157
  - Example: Use the Device's Firmware Image to Update the Xbee Firmware Synchronously158
Troubleshooting160
- Cannot Find the Serial Port for the Device161
- Correct a Macos Java Error163
  - Condition163
  - Solution163
- Unresponsive Cellular Component in Bypass Mode164
  - Condition164
  - Solution164
- Error Failed to Send SMS164
- Network Connection Issues165
  - Condition165
  - Solution165
- Brownout Issue165
- Hardware Flow Control in Bypass Mode166
- Socket Leaks166
  - Condition166
  - Solution167
Regulatory Information168
- United States (FCC)169
- Innovation, Science and Economic Development Canada (ISED)171
  - Labeling Requirements171

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