Basic Info.
Communication Distance
<8km
Product Description
SR_DEMO_A
Walkie Talkie Transceiver /Data transfer Module
Demo Board specification
( for DMR 1W350 module)
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1. Outline
1) The demo board can be used for these module evaluation as below:
SR_FRS_1WU: 1W/400M-480M
SR_FRS_1WV: 1W/136M-174M
SR_FRS_1W350: 1W/350M-390M
SR_FRS_2WU: 2W/400M-480M
SR_FRS_0W5U: 0.5W/400M-480M
DMR digital module:
SR_DMR_2WU: 2W/400M-480M
Please select the right demo board based on the module you used.
2) it is a full function Walkie Talkie Transceiver system; Only DC 5V power supply is needed. You may evaluate the voice talking and data transferring by the demo board; you needn't waste your time in search the components and sealing; it is convenient for you to evaluate our module quickly, and it is also effective for you to expedite the development;
3)The accessories of this demo board are as below: One antenna;
We don't provide the battery and the speaker, because it can't be shipped.
4)We will provide you the technical support for both hardware and software , more than it, we can provide you the demo code for your reference;
2. The feature of the demo board
1) Voice intercom demo;
2) Data transfer demo;
3) We leave a group interface for customer development
4) Size: 50 X 65 mm
3. About voice intercom demo
1) plug the speaker to the white outlet;
2) fix the antenna to the demo board;
3) Connect the DC power supply (or Battery) to the demo board,please pay attention to the power
polarity;The DC power voltage could be 3.3V-5V, the recommend DC power is 4.0V; The current capacity should be double of the transmit current.
4)After connect the power supply correctly, the power Led would turn on;
5)When press the PTT key,The red LED for transfer state indication would turn on; Now you may talk;Release the PTT Key , Red LED would turn off,it into the receive state,you may receive the talking from opposite side ;
4. How to set the parameter of the module
The setting command please refer "serial communication protocol" ,You may ask it from our company;
Special comment:
For we have two type module of analog and digital(DMR), The following spec. is just for our analog module.
Because the DMR module has different BAUT and command, so, if you order the DMR module, please refer to the DMR spec. to operate it.
1) The serial port connection Schematic diagram.(just a sample for FRS_1WU module)
Please connect the demo board TXD,RXD , GND with the USB TO UART board
Comment:
We leave two UART interface for user,
One is RS232 level, please add the MAX232 yourself;
One is TTL level (3.0V), the sample is for TTL level.
2) PC COM port setting
Serial port;May be COM1,COM2.COM3…. etc.
Baut: 9600 only;
Parity:None
Data:8
stop:1
3) Frs module parameter setting:( The command below is for analog module, not for DMR module)
Here is a example for GROUP COMMAND Setting:
AT+DMOSETGROUP=0,450.0500,450.0500,0,2,0,0
(An "Enter" must be added at the end of the command)
The parameter contents are as below in turn:
0:Narrow
450.0500:Transmit frequency( MHZ)
450.0500:Receive frequency ( MHZ)
0:Receive CTCSS
2:Squelch level
0:Transmit CTCSS
0:Rf output power and etc. :
Comment:
The Tx Frequency and Rx Frequency can be set alone.
The Tx CTCSS and Rx CTCSS can be set alone.
The parameter can't be kept because of this demo board without MCU.
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1) the demo board with antenna, without battery(Li_ion battery is better), speaker(1W/4R);
2) the demo board is subject to change without notice;
3) please contact us for complete spec. of demo board;
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