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www.lairdtech.com

 

 

Laird Technologies

 

 

CL2510

 

RF Transceiver

The CL2510 utilizes a Server-Client configuration to synchronize the frequency hopping of all devices in the 

 

network. The Server transmits a brief beacon immediately after hopping to a new frequency. This beacon  

contains information about the network and the hopping pattern. Client radios will synchronize to this beacon 

to ensure they are on the same frequency at the same time as the Server. The Client Link LED will light when 

the Client is synchronized to the Server.

Each network should consist of only one Server and there should never be two Servers on the same RF  
Channel and System ID in the same coverage area. Collocated Servers are permitted, provided the Servers  
are on different RF Channels. Additional Servers in the same coverage area will degrade the performance for  
all radios.  Interference will increase a maximum of 2.3% for each Server added when hopping over 43 hops 
and a maximum of 1.2% when hopping over 79 hops. Degradation may be transparent to the end user  
depending on the number of retries/attempts and the data rate.

mODES OF OPERATION

The CL2510 has two primary modes of operation:
Transparent Mode
Command Mode

Transmit mode is used to transmit serial data across the RF and Command Mode is used to reconfigure 

 

the CL2510.

TRANSmIT mODE

All packets sent over the RF are either Broadcast or Addressed (Unicast) packets.    

BROADCAST PACKETS

A Broadcast Packet is one that can be received by all eligible receivers on the network. To increase the  
reliability of the delivery of Broadcast packets, the transmitting radio will transmit the message the number  

of times specified by the Broadcast Attempts. Broadcast Attempts are necessary because Broadcast packets 

 

are not acknowledged by the receiving radio. Therefore, the transmitting radio has no method for guaranteeing 
receipt of the message. The default Broadcast Attempts is 3 and more or less may be necessary in different  
applications. Increasing Broadcast Attempts will increase the reliability of data at the cost of the overall 
throughput potential of the link. The receiving radio will not forward duplicate Broadcast packets on to the 
OEM host.

ADDRESSED PACKETS

An Addressed Packet is one that is only sent to a specific transceiver based upon the MAC address of the 

 

destination. Addressed packets are acknowledged by the receiving radio, so additional Transmit Retries will  
only be used if necessary. The transmitting radio will retry sending an Addressed Packet until all of the  
Transmit Retries have been used or until it receives a successful acknowledgement from the receiving radio.

COmmAND mODE

Command Mode is used to configure the transceiver. To enter Command Mode on the CL2510 the OEM host 
must send the AT Enter Command string “AT+++”. Once in Command Mode, all data received by the radio 

over the serial interface is interpreted as command data. Data received over the RF interface will be stored in 
the TX buffer until Command Mode is exited.

When using the Laird Technologies Configuration Utility, the OEM doesn’t need to worry about entering and 

exiting Command Mode, as the software will do that automatically. These details on Command Mode are pro-

vided for OEMs manually configuring the radio.

* Design Tip: Entering Command Mode.

A properly formed Enter AT Command string must be issued when the RX Serial buffer on the radio is empty.  
If data is either pre-pended or added to the AT string, the radio will not properly identify it as the AT Enter 
Command Mode command and will not enter Command Mode. It is suggested that the OEM host wait a  

sufficient period of time between the last data packet and the AT Enter Command Mode. This time varies 

 

depending on the amount of data being sent and the number of retries/attempts configured. Waiting at 

 

least 250ms should be sufficient for most applications.

THEORY OF  

OPERATION

Summary of Contents for ConnexLink CL2510

Page 1: ...CL2510 RF Transceiver USER MANUAL Innovative Technology for a Connected World www lairdtech com Version 1 4 ...

Page 2: ...y and implied or by description regarding the information set forth herein Laird Technologies reserves the right to change specifications at any time and without notice Laird Technologies products are intended for use in normal commercial and industrial applications Applications requiring unusual environmental requirements such as military medical life support or life sustaining equipment are spec...

Page 3: ...eiver REVISION HISTORY Revision Description Version 1 0 02 22 10 Initial Release Version Version 1 1 06 02 10 Updates to images and tables Version 1 2 07 22 10 General Updates Version 1 3 08 11 10 Update FCC Version 1 4 06 20 11 Update CE REVISION HISTORY ...

Page 4: ...kets 6 Addressed Packets 6 Command Mode 6 Network Topologies 7 Point to Point 7 Point to Multipoint 7 Other Network Topologies 8 CL2510 Configuration Settings 9 Mode Server Client 9 Max Power 9 RF Channel 9 System ID 9 Interface Baud 9 Transmit Retries 9 Broadcast Attempts 9 Full Duplex 9 Auto Destination 10 Broadcast 10 Destination Address 10 Mac Address 10 Additional Features 10 Configuration Ut...

Page 5: ...opping spread spectrum for security and interference rejection Customizable RF channel and system ID Automatic link synchronization Low latency and high throughput OVERVIEW The CL2510 is available with a male DCE RS 232 interface and 50mW of output power for use in the worldwide 2 4GHz ISM bands This document contains information about the hardware and software interface between a Laird Technologi...

Page 6: ...pping Spread Spectrum Output Power CL2510 050 50 mW conducted CL2510 100 125 mW conducted Maximum radiated power EIRP 100mW CE or 316mW FCC depending on antenna and country of use Range Line of Sight CL2510 050 with 2 dBi Antenna Outdoor 1 5 miles 2 4 km Indoor 790 ft 240 m Sensitivity 98 dBm at 280 kbps RF Rate 94 dBm at 500 kbps RF Rate Electrical Environmental Supply Voltage 6 V to 30 V DC Max ...

Page 7: ...ndicates the unit is powered up Link Red On indicates the radio is capable of establishing a link On a Client the Link LED activates when it is in range of the Server and receiving the synchronization beacon On a Server the Link LED is always lit RXD Green When flashing indicates the CL2510 is receiving serial data TXD Red When flashing indicates the CL2510 is transmitting serial data SPECIFICATIO...

Page 8: ...determines how data flow between the host and the CL2510 is throttled Often in serial communication one device is capable of sending data much faster than the other can receive Flow control allows the slower device to tell the faster device to pause and resume data transmission Flow control CTS and RTS are used by the CL2510 and its Host locally NOT over the air Therefore one CL2510 cannot tell th...

Page 9: ...d for guaranteeing receipt of the message The default Broadcast Attempts is 3 and more or less may be necessary in different applications Increasing Broadcast Attempts will increase the reliability of data at the cost of the overall throughput potential of the link The receiving radio will not forward duplicate Broadcast packets on to the OEM host Addressed Packets An Addressed Packet is one that ...

Page 10: ...ltipoint systems have one base station or access point that controls all communications with all of the other wireless nodes in the network This allows for the creation of a wireless network consisting of multiple nodes In a point to multipoint network the Server would typically be set up as the access point and would be configured to transmit Broadcast Packets The other nodes would be set up as C...

Page 11: ...s There is some additional latency associated with the repeater this latency is between 20 and 40ms typically Server Central Computer Client Client Client Server Client Client Client Repeater module consisting of two Radios Other network topologies Repeater networks Though there is no functionality for a node to automatically forward a message along to another radio repeater networks can be setup ...

Page 12: ...os on the network must have the same RF Channel unless Auto Channel is enabled on the Clients Collocated networks should use different RF Channels to avoid interference System ID A number that designates the network identifier All radios must be on the same System ID unless the Clients are configured with Auto System ID Interface Baud This defines the baud rate used for communicating with the CL25...

Page 13: ...ed receiving radio MAC Address The MAC Address is unique 6 byte address assigned at the factory It is the address a remote radio should place in the Destination Address field to communicate with that radio Remote I O Remote I O for CTS RTS and Remote I O for DSR DTR allow these pairs of I O lines to have their states transmit ted across the RF and reflected on the remote radio These pairs of I O l...

Page 14: ...nstallation the software will prompt the user to install the Laird Technologies USB Driver It is recommended that the user installs the driver at the same time as the software The first time the software is run the following message will be displayed Click OK The software will attempt to open COM1 of the PC If there is a conflict or the port does not exist the software will show the port as unavai...

Page 15: ...and list its status as Unavailable Open Closed The Port Status is shown just above the Port pull down menu and also in the status bar at the bottom of the screen The software will only be able to communicate with a radio if the Port Status is Open Although menus are shown for Baud Rate Parity Handshaking Data Bits and Stop Bits only the Baud Rate Parity and Handshaking menu selections can be chang...

Page 16: ... will not be shown The text shown in the bottom status bar gives a simplified status of the current pending software process The software has no pending process when Communications Idle is shown On the right side of the status bar a progress bar is maintained to indicate the progress of longer commands such as a Find Ports or Write Radio About Button The About button can be pressed to determine th...

Page 17: ...ate through Port 1 When the Port 2 button is depressed the Write Radio and Read Radio buttons communicate through Port 2 Calc Baud Button The Baud pull down menu includes all standard PC baud rates In some rare cases a user may want to use a non standard baud rate To do this the user will need to click on the Calc Baud button The Calculate Baud Rate dialog box will appear To calculate the settings...

Page 18: ...re these changes The Actual Baud Rate will not always match the Desired Baud Rate However the program verifies that the Desired Baud Rate is within 3 of the Actual Baud Rate as required by the radio Hex Decimal Button All of the text entry type boxes found on the Configure tab have an indication of whether the value is presented in Hexadecimal Hex or Decimal Dec The indication Hex or Dec can be cl...

Page 19: ...button is used to load a file previously created by this application and can be loaded to restore an EEPROM to a former state Save to File Button This button is used to save an EEPROM program to a file This allows for the current state of the EEPROM to be restored at a later time Compare EE Button The Compare EE button allows you to compare two or more saved EEPROM files This can be a very useful ...

Page 20: ...ection is used to send bidirectional data from both radios connected to the PC Port 1 Send Only This test selection is used when one CL2510 is connected to a PC This selection is used only to send data from the radio connected to Port 1 This would most often be used when the remote radio is connected to a second PC and is running the Port 1 Receive Only test There is no data verification with this...

Page 21: ...lows you to select the data packet used to perform the Range Test You may either create data of a specified byte length or load your own text or configuration file Test Type The test type allows you to select how long the test will be performed The choices are shown in the following graphic Continuous Test will run until stopped Timed Test will run for a specified time period Number of Runs Test w...

Page 22: ...t to run a specific number of runs it will display the number of runs that remain Port 1 Port 2 Displays the Tx or Rx activity for Port 1 and Port 2 View Tx Packets View Rx Packets Allows you to switch between Tx or Rx packets in the Port 1 Port 2 display Clear Button This button sets all of the statistics and errors back to zero This can be used while a test is running Terminal Chat Tab The Termi...

Page 23: ...mmands for the module Additional commands may be added to the list The length of the Command Name is not restricted and is not required by the application Command Field The Command field contains a list of the commands for each of the command names in the Command Name field When a command name is selected in the Command Name field the command that is in the same position in the adjacent Command fi...

Page 24: ...ta Line Perform Reset After Completion When enabled the radio will be reset after the selected command has completed This is useful when writing EEPROM changes which only take affect after a reset Port 1 Port 2 Buttons When Port 1 is depressed data will be sent out Port 1 When Port 2 is depressed data will be sent out Port 2 Send Comm This button sends the selected command out of the selected seri...

Page 25: ...rk RF Channel Number System ID there can be any number of Clients 2 The Default configuration is a Client radio with the addressing mode not set For the radios to communicate the addressing must be set to either Broadcast Mode Auto Destination for Clients only The MAC Address of the remote radio must be entered into the Destination Field 3 The Link LED on the Server will always be lit The Link LED...

Page 26: ...e equipment should be used at distances greater than 20 cm from the human body Operation at distances of less than 20 cm would require additional RF exposure evaluation including SAR requirement according to FCC RF Exposure guideline Additional information about RF exposure and compliance in Canada can be found at Industry Canada s website www ic gc ca NOTE This equipment has been tested and found...

Page 27: ...5dBi Antennas having a gain greater than the maximum allowed are strictly prohibited for use with this device The required antenna impedance is 50 Ohms CE TESTED ANTENNA LIST Laird Technologies Part Number Manufacturer Part Number Manufacturer Type Gain dBi 0600 00014 S181AH 2450S Nearson Dipole 2 dBi ANT DB1 RMS RPS7 Antenna Factor Monopole 3 dBi The OEM is free to choose another vendor s antenna...

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