315Mhz Romote RF Module Kit -Arduino Compatible
This 315MHz RF Module Kit including one 315MHz RF Receiver Module and one 315MHz RF Transmitter Module.
1、Transmitter Module
Special Parameter
Frequency : 315Mhz
Modulation : ASK
Working Voltage : 4～9V DC
Frequency difference：min±75KHz max±150KHz
Launching power: 50mW (9V)
Working current：＜10mA (9V)
Frequency stability : 0.037ppm/℃
Temperature range：-20℃--+85℃
Transmission rate : ≤10Kbps
Encoder : PT2262 or Compatible Chip
Timing resistor：1.5M
Receiver Sensibility: -105dbm
Emission Distance: 500m in open ground
Size : 37 x 23 x 8mm
This module have been pinout All data interface, convenient for useage, and only when more than one data bits among 10 ~ 13 four data bits are high electricity level, the module will transmit the high frequency signal .
2、Receiver Module
This is superregeneration Decoder Receiver
Decoder : PT2272
Size: 41x24x6 mm
It can be compatible with transmitter with 2262 chip ，315MHZ ，and 1.5M Timing resistor
Specialized superheterodyne receiving module has an inherent disadvantages :
when remote control signal is too strong and the module oscillation signal will be blocked, and unable to properly receive signal.
So at this time, you should be away for some distance (such as 10 meters) and then it can work normally.
Warning: this kit is not suitable for data transfer but remote control. Safe for 2 commands/second
3、Encoding and Decoding
The popular link is like this: MCU -> Encoder -> Transmitter ------ Receiver -> Decoder -> MCU
PT2262(Encoder) and PT2272(Decoder) are optional, their existence is to 1)avoid confusing when multiple RF links in range 2) isolate disturbance. You can integrate the encoding and decoding work to the MCUs on both side. Whenever there is no 315Mhz devices around, you may use it as direct cable connection.
