The HT12E uses the address to transmit with the transmitted data. IR receiver-transmitter interfacing with Arduino.RF Transmitter and Receiver Module Interfacing with Arduino.In addition to the above example circuit, You can also see this example on IR transmitter and receiver interfacing with Arduino. Here the IR transmitter circuit with encoder but the same circuit can be generated for RF just by replacing the IR transmitter. These addresses make them operate with their desired devices. Sometimes you may notice that different devices remote doesn’t operate with each other, it is because of there specific address. Each button of the remote sends the different data input on the encoder and then the encoder passes it to the output pin. You may notice that there are multiple buttons on the remote and each of them delivers a different function. To use the encoder with external devices always check for their voltages otherwise the encoder can be destroyed. Due to the availability of microcontrollers and other smart devices the input signal can be applied through their GPIO pins. The encoded signal gets the address and data in the form of logic states mostly. These pins are 4 in number and these four pins describe the data in the encoded signal. In those cases where two receiving end or sending ends have the same address, then devices start messing with each other. The address is like a security for the communication system. The broadcasted signal has an address that gets identified by the decoder to receive the data. Most of the devices attached to the encoder only broadcast the signal. The address pins are eight in numbers which describe the address of encoded signal. In these 12-bits, 8 of them will come from the address pins and the rest of them will be from data input pins. The primary function of the encoder is to encode the 12-bit parallel input data and then forward it towards the output pin. The following diagram represents the internal structure of the HT12E. Smoke and builder alarm system encoder their message by HT12E.Most of the smart systems communicate with each other wirelessly which also has HT12E to avoid the load on the internet. Recently IoT production has been increased very much.In remote control systems, this encoder is widely available for encoding the data for transmission.HT12E Encoder datasheet HT12E Encoder Applications Only 256 different combinations of addresses are usable with HT12E.
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