Download 315MHz/433MHz ASK OOK RF Wireless Module User Guide

315MHz/433MHz ASK OOK RF
Wireless Module User Guide
Rev 1.0, May 2012
315MHz/433MHz ASK OOK RF Wireless Module User Guide
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Table of Contents
Introduction ............................................................................................................................. 3
Specifications ........................................................................................................................... 3
Schematic ................................................................................................................................. 4
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315MHz/433MHz ASK OOK RF Wireless Module User Guide
1 Introduction
An RF Module (Radio Frequency Module) is a (usually) small electronic circuit used to
transmit and/or receive radio signals on one of a number of carrier frequencies. RF Modules are
widely used in electronic design owing to the difficulty of designing radio circuitry. Good
electronic radio design is notoriously complex because of the sensitivity of radio circuits and the
accuracy of components and layouts required to achieve operation on a specific frequency.
Design engineers will design a circuit for an application which requires radio communication and
then "drop in" a radio module rather than attempt a discrete design, saving time and money on
development.
RF Modules are most often used in medium and low volume products for consumer
applications such as garage door openers, wireless alarm systems, industrial remote controls,
smart sensor applications, and wireless home automation systems. They are often used to
replace older infra red radio communication designs as they have the advantage of not requiring
line-of-sight operation.
Several carrier frequencies are commonly used in commercially-available RF modules,
including 433.92MHz, 315MHz, 868MHz and 915MHz. These frequencies are used because of
national and international regulations governing the used of radio for communication. (citation
needed)
The 315MHz/433MHz ASK OOK RF Wireless Module transmitter module A is a small PCB
sub-assembly capable of transmitting a radio wave and modulating that wave to carry data.
Transmitter modules are usually implemented alongside a micro controller which will provide
data to the module which can be transmitted. The receiver module use Super-regenerative
technique which are usually low cost and low power designs using a series of amplifiers to extract
modulated data from a carrier wave. Super-regenerative modules are generally imprecise as their
frequency of operation varies considerably with temperature and power supply voltage.
2 Specifications
Transmiter
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Operating voltage: DC 3V~12V
Static Current < 0.1 μA
Transmit power < 10mW
Operating frequency : 315MHz/433MHz
Frequency stability: ±75KHZ
Modulation Mode :ASK/OOK
Data Rate: 2.4Kbps
Dimensions (L x W): 18.5x18.5 mm
Receiver
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Operating voltage: DC 5V
Operating frequency:315MHz/433.92MHz
Modulation: ASK/OOK
Modulation rate:2Kbit/s
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315MHz/433MHz ASK OOK RF Wireless Module User Guide
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Working sensitivity: better than-100dbm
Demodulation mode: super regenerative type
Operating Current:≤4.5mA
Dimensions (L x W): 14*33mm
3 Schematic
Transmiter
Receiver
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