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Products-RF Module-HR-1021 Data RF Module
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HR-1021, the low-power wireless transceiver data module is used as the wireless data transceiver in short-ranges, with the small size, weight and power consumption and good stability and reliability. Narrowband low power UHF wireless data transmitters and receivers with channel spacings as low as 25 kHz:
* AMR Automatic Meter Reading
 * Wireless alarm and security systems
 * Home automation
 * Low power telemetry
* 433 / 868 and 915 MHz ISM/SRD band systems
* Data radio can be used for Wireless conference voting system;
* Mapping;
* Radio modem can be used for Sports training & competition;
* Wireless dishes ordering;
* Wireless POS, PDA wireless smart terminal;
* RF modem can be used for Electronic bus station and intelligent traffic;
* RF transmitter Wireless electronic display screen and queuing machine;
* Wireless telemetry Charging for parking, parking lot;
* Wireless modem Automobile inspection and four-wheel orientation;
* Wireless sensor Industrial wireless remote control and air conditioning remote controller;
* Observation and predication of oil well and hydrological information;
* Wireless RS232/RS485 conversion/connector;
* Point to multi-point wireless network, wireless on-the-spot bus and automatic data collection system;
 Condition:
Technical specification of HR-1021: 
Serial number
Item
Parameter
Note
1
Modulation mode
GFSK/FSK
 
2
Work frequency
420.00~450.30/860~875/910~925MHz
 
3
Transmission power
17Bm(50mW)
 
4
Receiving sensitivity
-115 ~ -118dBm
 
5
Channel amount
8channel
User setting
6
Transmitting current
<100mA
 
7
Receiving current
<30mA
 
8
Sleeping current
<3uA
 
9
Interface velocity
1200/2400/4800/9600/19200bps
 
10
Interface mode
UART TTL/RS-232/RS-485
User setting
11
Power supply
+3~5VDC
 
12
Working temperature
-25 to +80
13
Working humidity
10%~90%(relative humidity without condensation)
 
14
Dimension
47mm*6mm*10mm
 
15
Reliable transmit distance
1200m
 
 
              
Pin No
Pin Name
Description
Level
Connected to Terminal
Memo
1
GND
Grounding of Power Supply
 
Grounding of Power Supply
 
2
VCC
Power supply DC
3.3~5.0V
 
 
3
RXD/TTL
Serial data receiving end
TTL
TXD
COM1
4
TXD/TTL
Serial data transmitting end
TTL
RXD
5
SGND
Grounding of the signal
 
 
 
6
A(TX)
A of RS-485
Or TX of RS-232
 
A(RXD)
COM2
7
B(RX)
B of RS-485 or RX of RS-232
 
B(TXD)
8
SLEEP
Sleep control (Input)
TTL
Sleep signal
Low efficiency t>15ms
9
RESET
Reset control (input)
TTL
Reset signal
Negative pulse reset 1ms
 
 
Features:
1. low power transmission with the transmission power of 17dbm/50mW.
2. ISM frequency band , requiring on application of frequency point.
Carrier frequency of 433MHz(HR-1021 F433), 915MHZ(HR-1021 F915), 868MHz(HR-1021 F868).
3. High anti- interference and low BER(Bit error Rate)
Based on the GFSK modulation mode, the high- efficiency forward error correction channel encoding technology is used to enhance data’s resistance to both burst interference and random interference and the actual bit error rate of 10-5 ~ 10-6 can be achieved when channel bit error rate is 10-2.
4. Long transmission distance
Within the range of visibility, the reliable transmission distance is >500 m when the height is greater than 2m (BER=10-3@9600bps).
Within the range of visibility, the reliable transmission distance is >800 m when the height is greater than 2m (BER=10-3@1200bps).
Within the range of visibility, the reliable transmission distance is >800 m when the height is greater than 3m (BER=10-3@9600bps).
Within the range of visibility, the reliable transmission distance is >1200 m when the height is greater than 3m (BER=10-3@1200bps).
5. Transparent data transmission
Transparent data interface is offered to suit any standard or nonstandard user protocol. Any false data generated in the air can be filtrated automatically (What has been received is exactly what has been transmitted).
6. Multi- channel
The standard HR-1021 configuration provides 8 channels. If the user needs, it can be extended to 16/32 channels, meeting the multiple communication combination mode of the user.
7.Dual serial port, 3 interface modes
HR-1021 provides 2 serial ports and 3 interfaces, with COM1 as the TTL level UART interface and COM2 as user defined standard RS - 232/RS - 485 interface (user only needs to plug/pull 1 bit short circuiter and energize it to make the definition).
8. Large data buffer zone
    Interface baud rate is 9600bps with format of 8N1/8E1 and user self- definition, allowing the transmission of long data frames at one time for more flexible programming by users. (If the user needs, it can also transmit the data in unlimited length at one time).
9. Intelligent data control and the user doesn’t need to prepare excessive programs
Even for semi duplex communication, the user doesn’t need to prepare excessive programs, only receiving/transmitting the data from the interface. HR-1021 will automatically, complete the other operations, such as transmission/receiving conversion in the air, control, etc.
10. Low power consumption and sleeping function
For receiving, current is <30mA, transmitting current is <100mA, and sleep current is <20uA.
11. High reliability, small and light
Single chip radio - frequency integrated circuit and single chip MCU are used for lessened peripheral circuit s, high reliability, and low failure rate.