Wireless sensors transmit either a learning code, fixed code or rolling code to a wireless alarm system.

To understand this one only need to understand that each sensor must have a unique address (also called a code) that belongs only to that sensor. This address is then programmed into an alarm system panel. Once this is completed the alarm panel will know about this sensor and be on the lookout for this code.

There are 3 types of these wireless alarm codes and below is the differences but to sum it up briefly: Fix codes have

6561 uniquewireless alarm codes addresses and learning code have 1048576 possible addresses.

Learning code is thus much more secure than fix code, although our DIY alarms support both learning code and fix code (although learning code becomes quickly redundant and so the support for it) almost all our sensors today is fix code sensors. Our more advanced Pro alarm systems incorporate only rolling code sensors and remote controllers

Fix Code:

IC: Encode chip PT2262 (Traditional wireless detectors)
Decode chip PT2272 (Traditional wireless alarm control panel)
Address: 3 to the 8th power (6561 unique addresses).


1.Security level not high, the limited available addresses may cause duplicate address codes. This may cause false alarm.

2.Encode address require that the user have some basic knowledge of electronic technology.

Learning Code:

IC: eV1527
Decode: MCU
Address: 2 to the 20th power (1048576 unique addresses)


1.High security level, 100 million addresses decrease the duplicate address rate.

2.It’s easy and convenient to add and delete the wireless sensors and detectors. All the wireless detectors and accessories using different address codes, you just need to learn them into alarm system.

Fixed Code VS Learning Code VS Rolling Code Comparison
TypeTypical ICEncoding MethodSecurityPrice
Fixed CodePT2262Manual Encoding, using dip switch or soldering to set address codeLowLow
Learning CodeEV1527Automatic Encoding, copying fixed code or learning code remoteMediumMedium
Rolling CodeHCS301Automatic Encoding, using algorithm to generate different code every timeHighHigh

Pin It on Pinterest

Share This