RN-41 Roving Networks Inc, RN-41 Datasheet - Page 18

• Manufacturer Part Number: RN-41
• Description: MODULE BLUETOOTH W/ANT CLASS1
• Manufacturer: Roving Networks Inc

Specifications of RN-41

• Frequency: 2.4GHz
• Data Rate - Maximum: 2Mbps
• Modulation Or Protocol: Bluetooth v2.0+EDR, Class 1 & 2
• Applications: Bluetooth v2.0
• Power - Output: 15dBm
• Sensitivity: -80dBm
• Voltage - Supply: 3 V ~ 3.6 V
• Current - Receiving: 35mA
• Current - Transmitting: 65mA
• Data Interface: PCB, Surface Mount
• Memory Size: 8MB Flash
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Wireless Frequency: 2.402 GHz to 2.48 GHz
• Interface Type: UART, USB, PCM
• Data Rate: 721 Kbps to 2 Mbps
• Modulation: FHSS, GFSK
• Operating Voltage: 3.3 V
• Antenna: Chip Antenna
• Board Size: 13.2 mm x 25.8 mm x 2.05 mm
• Operating Temperature Range: - 40 C to + 85 C
• Security: 128 bit Encryption
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 740-1007

5.4 Disabling Output Drivers
5.5 Lowering Transmit Power
www.rovingnetworks.com
To enable even lower power utilization, use the S|, <hex word> command to set an on/off duty cycle.
All Roving Networks Bluetooth modules and adapters adhere to the Bluetooth (1.1, 1.2, and 2.0/2.1)
specifications for power control. Both the RN-21 and RN-41 radios are Class 1 capable.
The power output of the radio is automatically controlled by the baseband. Depending on the operation mode
(inquiry scan, page scan, connected) the power is adjusted. Once a connection is made, the radios on both
sides negotiate a power setting based on the perceived signal strength (RSSI).
The transmit power can be controlled to:
Use the SY command can be used to configure the transmit power: Using a command, the radio can be
instructed to use a value that is lower than the default.
SY,<hex value> where hex value is unsigned hex representation of the setting.
If a non-zero value is stored in the variable, then upon power up, the radio will use the HIGHEST value that
is less than or equal to the stored variable.
Example: if -8 = 0 dBM is desired, you would enter SY,FFF8
If 0 = 6dBm is desired, you would enter SY,0001 ( you could also enter 0002, or 0003 )
Power setting will take effect after power cycle or reboot or reset pin toggle.
To check the STORED power setting, use the O command. you will see TX Power=1 or other setting equal
to the value you entered. To check the current power setting, use the GY command. Only the actual value
Use the command “ S%,1000” to set all PIO0-11 to inputs.
This will also turn off the LED (PIO5) on the FireFly adapter.
809 University Avenue
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reduce effective range for security reasons
lower radio emissions for agency compliancy concerns
reduce total power consumption
Setting
-24
-16
-12
-8
-4
0
4
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Los Gatos, CA 95032
Hex value
FFFC
FFE8
FFF0
FFF4
FFF8
0001
0004
~ 18 ~
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Tel [phone]
Approximate output (dBM)
rn-bluetooth-um Version 4.77 1/24/2011
12 (default)
Advanced User Manual
-20
-10
-5
0
2
6
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