CN114978429B - Wireless transmitting and receiving method for door and window control - Google Patents

Abstract

A wireless transmitting and receiving method for door and window control in the technical field of wireless communication comprises the following steps: the transmitting terminal generates an address code, a control code and a synchronous code, generates an encrypted synchronous code by synchronous encryption, checks data formed by the synchronous code and a synchronous encryption calculation code to obtain a check code, and transmits the data formed by the address code, the control code, the encrypted synchronous code and the check code outwards; the receiving terminal takes out the address code and the control code from the received data, decrypts the received encrypted synchronous code to obtain the current synchronous code, compares the decrypted current synchronous code with the synchronous code in the previous operation, and compares the current check code with the received check code; and the receiving terminal determines whether the current control operation is effective according to the verification comparison result of the address code, the synchronous code and the check code. The invention realizes compatibility with the original fixed code products in the market, and simultaneously checks the synchronous code and the synchronous encryption calculation code, thereby greatly improving the safety of data transmission.

Description

A wireless transmission and reception method for door and window control

technical field

The invention relates to a data transmission and reception method in the technical field of wireless communication, in particular to a wireless transmission and reception method for door and window control which simultaneously checks a synchronization code and a synchronization encryption calculation code.

Background technique

The 315MHz and 433MHz wireless transceiver systems are widely used in wireless control systems for electric doors and windows due to their long transmission distance, reliable data transmission, good wall penetration performance, low power consumption and low cost.

At present, most of the 315MHz and 433MHz wireless control systems on the market use 1527 fixed codes for data transmission. 1527 encoding is a fixed encoding format, and the number of address codes and control codes is fixed, which determines that the address code capacity of this encoding format is limited. Since the 1527 fixed code is a standard code format, transmitters and receivers of different manufacturers using this code are universal. Therefore, this fixed encoding format is widely used in products currently on the market.

Due to the limited capacity of the address codes using the fixed encoding format, as the volume of products on the market increases, the probability of duplicate address codes for products within a small range increases greatly. Between different users, there may be a situation of stringing codes with each other, which may lead to serious security accidents. In addition, due to the limited number of fixed-coded address codes and uniform coding standards, this coding method is easy to be cracked by violence and secretly copied by others, which will also lead to serious security accidents.

In order to avoid the above defects of the fixed code, many manufacturers have also adopted the rolling code format. The use of the rolling code format has greatly improved the security of the product, but the current rolling code is not compatible with the previous fixed code products, which greatly reduces its popularity in the market. In addition, in the current rolling code, since the password for encoding and encryption is fixed and manually managed, there is a risk that the password is easy to leak and be secretly copied by others.

Contents of the invention

Aiming at the deficiencies in the prior art, the present invention proposes a wireless transmission and reception method for door and window control, which is suitable for a 433MHz or 315MHz electric door and window wireless control system composed of a transmitting terminal and a receiving terminal, and realizes compatibility with the 1527 common in the market. Fixed coding products; at the same time, by introducing a rolling coding method using random passwords, the security of wireless data transmission and reception is greatly improved.

The present invention is realized through the following technical solutions, and the present invention includes the following steps: S1, the transmitting terminal generates a 20-bit address code, a 4-bit control code and a 20-bit synchronization code; S2, after the transmitting terminal adds 1 to the 20-bit synchronization code, Synchronous encryption calculation is performed through the 20-bit synchronous encryption calculation code to generate an encrypted synchronization code; S3, the transmitting terminal performs check calculation on the 40-bit data composed of the 20-bit synchronization code and the 20-bit synchronization encryption calculation code according to the check calculation code, and obtains 4 1-digit check code; S4, the transmitting terminal transmits the 48-bit transmission data composed of 20-bit address code, 4-bit control code, 20-bit encrypted synchronization code and 4-bit check code through radio; S5, the receiving terminal receives From the received 48-bit transmission data, take out the 20-bit address code and 4-bit control code, and verify and compare the address code; S6. The receiving terminal decrypts the received 20-bit encrypted synchronization code according to the synchronous encryption calculation code to obtain 20 bits Current synchronization code; S7, the receiving terminal compares the current synchronization code obtained by decryption calculation with the synchronization code during the previous control operation; S8, the receiving terminal calculates the 20-bit current synchronization code and the 20-bit synchronization encryption calculation code according to the verification calculation code Perform verification calculation to obtain the current verification code; S9. The receiving terminal compares the current verification code obtained by the verification calculation with the received 4-digit verification code; S10. Verify and compare the results of the codes to determine whether the current control operation is valid, and if it is valid, execute the control operation and save the current synchronization code.

Further, in the above step S1, the 20-bit address code and the 4-bit control code adopt a 1527 fixed encoding format to form the lower 24 bits of the encoding of the transmitted data; the 20-bit synchronization code gradually changes from 0 to 1048576 when the transmitting terminal performs each control operation. Increase.

Furthermore, among the 48-bit transmission data in the above step S5, the sequence from high to low is: 4-bit check code, 20-bit encrypted synchronization code, 4-bit control code, 20-bit address code; , via a 433MHz or 315MHz radio.

Furthermore, in the above step S5, the verification comparison of the address code is to compare the received 20-bit address code with the address code stored in the receiving terminal, if the comparison is consistent, it indicates that the received address code is Effective address code; in step S7, when comparing the synchronization code, the current synchronization code must be greater than the synchronization code during the previous control operation, and the current control operation is valid; in step S9, comparing the check code When the current check code is consistent with the received check code, the current control operation is valid.

Furthermore, the synchronous encryption calculation codes in the above steps S2 and S6, and the verification calculation codes in the steps S3 and S8 are all obtained by the transmitting terminal and the receiving terminal through matching learning, and the transmitting terminal uploads the code for the first time. Randomly generated when powered on.

The present invention also includes a matching learning method for a transmitting terminal and a receiving terminal, comprising the following steps: S1. The transmitting terminal generates a 20-digit address code and a 4-digit learning code; S2. The transmitting terminal generates a 24-digit random code when powered on for the first time; S3. Take the upper 20 bits of the random code as the synchronous encryption calculation code, and take the lower 4 bits as the verification calculation code; S4, the transmitting terminal will use a 20-digit address code, a 4-digit learning code, a 20-digit synchronous encryption calculation code and a 4-digit verification calculation code The composed 48-bit transmission data is sent out through radio; S5, the receiving terminal is triggered externally to enter the matching learning state; S6, the receiving terminal takes out the 20-bit address code and 4-bit learning code from the received wireless transmission data and performs Verification comparison; S7. The receiving terminal extracts a 20-digit synchronous encryption calculation code and a 4-digit verification calculation code from the received wireless transmission data;

S8. The receiving terminal saves the received address code, encrypted calculation code and check calculation code for address comparison, synchronization code decryption calculation and check calculation during normal control operation.

Further, in step S1 of the above-mentioned matching learning method, the specific value of the 4-digit learning code is an agreed specified value for the transmitting terminal to perform matching learning; in step S2, the random code is generated only when the transmitting terminal is powered on for the first time. Generate and save, the random code will not be changed in any subsequent control operation.

Furthermore, in step S4 of the above-mentioned matching learning method, the transmitted 48-bit transmission data is arranged in the order from high to low: 4-bit verification calculation code, 20-bit synchronous encryption calculation code, 4-bit learning code, 20-bit address code; when it is transmitted by radio, it is through 433MHz or 315MHz radio.

Furthermore, in step S5 of the above matching learning method, the external trigger of the receiving terminal to enter the matching learning is realized by means of an external trigger button.

Furthermore, in the step S6 of the above-mentioned matching learning method, the verification comparison of the 20-digit address code is to compare the extracted address code with the address code stored in the receiving terminal, if the extracted address code does not exist, It indicates that the current matching learning operation is valid; the verification comparison of the 4-digit learning code is to compare the extracted 4-digit learning code with the specified value representing the matching learning operation. If they are consistent, it indicates that the current matching learning operation is valid.

Compared with the prior art, the present invention has the following beneficial effects: the present invention uses a combination of 24-bit fixed codes and 24-bit rolling codes to form 48-bit data encoding, and transmits data through a wireless transceiver system based on 433MHz or 315MHz , to realize the wireless control of electric doors and windows. Among the transmitted 48-bit data, the lower 24-bit data adopts the 1527 fixed encoding format to encode the address code and control code to achieve compatibility with the original fixed-code products in the market; while the upper 24-bit data is composed of 20-bit Rolling encoded data consisting of encrypted synchronization code and 4-digit check code. In rolling coding, by introducing a randomly generated 20-digit synchronous encryption calculation code and a 4-digit verification calculation code, the 20-digit synchronization code is encrypted, and at the same time the synchronization code and the synchronization encryption calculation code are verified, thereby greatly improving the data quality. Transmission Security.

Description of drawings

Fig. 1 is a flow chart of the normal control operation of a wireless transmission and reception method for door and window control in an embodiment of the present invention;

Fig. 2 is a flowchart of matching learning between a transmitting terminal and a receiving terminal in an embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the present invention, rather than limit the present invention. In addition, it should be noted that, for the convenience of description, the drawings show only some but not all structures related to the present invention.

The normal control operation flow of a wireless transmission and reception method for door and window control in the present invention is shown in Figure 1. The method is executed by a wireless control system for electric doors and windows based on 433MHz or 315MHz wireless transmission composed of a transmitting terminal and a receiving terminal. , including the following steps:

Step S1, the transmitting terminal generates a 20-bit address code, a 4-bit control code and a 20-bit synchronization code.

Among them, the 20-digit address code and the 4-digit control code adopt the 1527 fixed coding format, which is compatible with the fixed coding products commonly used in the market.

Step S2: After adding 1 to the 20-bit synchronization code, the transmitting terminal performs synchronization encryption calculation through the 20-bit synchronization encryption calculation code to generate an encryption synchronization code.

Among them, the synchronization code has a total of 20 bits, and the synchronization code is gradually increased from 0 to 1048576 for each control operation performed by the transmitting terminal. The synchronization encryption calculation code used in the synchronization code encryption calculation has a total of 20 bits, and is randomly generated when the transmitting terminal is powered on for the first time. After the synchronization code is encrypted and calculated, a 20-digit encrypted synchronization code is generated.

Step S3 , the transmitting terminal performs check calculation on the 40-bit data composed of the 20-bit synchronization code and the 20-bit synchronization encryption calculation code according to the check calculation code to obtain a 4-digit check code.

Wherein, the 4-digit verification calculation code used for the verification calculation of the synchronization code and the synchronization encryption calculation code is randomly generated when the transmitting terminal is powered on for the first time.

Step S4, the transmitting terminal transmits the 48-bit transmission data composed of 20-bit address code, 4-bit control code, 20-bit encrypted synchronization code and 4-bit check code to the outside through radio.

Among them, among the transmitted 48-bit data codes, the sequence from high to low is: 4-bit check code, 20-bit encrypted synchronization code, 4-bit control code, and 20-bit address code.

Step S5, the receiving terminal extracts the 20-bit address code and the 4-bit control code from the received 48-bit transmission data, and verifies and compares the address codes.

Step S6, the receiving terminal decrypts the received 20-digit encrypted synchronization code according to the synchronization encrypted calculation code to obtain a 20-digit current synchronization code.

Wherein, the synchronous encryption calculation code used for the decryption calculation of the encrypted synchronization code is obtained through matching learning between the transmitting terminal and the receiving terminal, and is randomly generated when the transmitting terminal is powered on for the first time.

Step S7, the receiving terminal compares the current synchronization code obtained through decryption and calculation with the synchronization code in the previous control operation.

Wherein, the current synchronization code must be greater than the synchronization code of the previous control operation, and the current control operation is valid. When the receiving terminal is powered on for the first time, the initial value of the synchronization code of the previous control operation saved by it is set to 0.

Step S8, the receiving terminal performs check calculation on the 20-digit current synchronization code and the 20-digit synchronization encrypted calculation code according to the check calculation code to obtain the current check code.

Wherein, the check calculation code used in the check calculation is obtained through matching learning between the transmitting terminal and the receiving terminal, and is randomly generated when the transmitting terminal is powered on for the first time.

In step S9, the receiving terminal compares the current check code obtained through check calculation with the received 4-digit check code.

Wherein, the comparison result of the current check code and the received check code is consistent, and the current control operation is valid.

Step S10, the receiving terminal determines whether the current control operation is valid according to the verification and comparison results of the address code, synchronization code and check code, and if valid, executes the control operation and saves the current synchronization code.

Wherein, the verification and comparison operation of the address code is to compare the received 20-digit address code with the address code stored in the receiving terminal. If the comparison is consistent, it indicates that the received address code is a valid address code.

Wherein, by verifying and comparing the address code, the synchronization code and the check code, it is shown that the control operation corresponding to the operation code received by the receiving terminal is valid, and the corresponding control operation is executed.

Wherein, if the current control operation is valid, the current synchronization code is stored in the receiving terminal as the synchronization code of the previous control operation, so as to be used for verification of the validity of the synchronization code during the next control operation.

In the technical scheme of the normal control operation of the wireless transmission and reception method, among the 48-bit data transmitted by the wireless transceiver system based on 433MHz or 315MHz, the lower 24-bit data adopts a 1527 fixed encoding format, and the address code and the control code are encoded to realize In order to be compatible with the original fixed code products in the market; while the high 24-bit data is rolling coded data composed of a 20-digit encrypted synchronization code and a 4-digit check code, and while encrypting the 20-digit synchronization code, The synchronization code and the synchronization encrypted calculation code are verified, thus greatly reducing the repetition rate of the system and improving the security of the system data transmission.

The flow chart of the matching learning method between the transmitting terminal and the receiving terminal in the present invention is shown in Figure 2. The method is implemented by a wireless control system for electric doors and windows based on 433MHz or 315MHz wireless transmission composed of a transmitting terminal and a receiving terminal, specifically including Follow the steps below:

Step S1, the transmitting terminal generates a 20-digit address code and a 4-digit learning code.

Wherein, the specific value of the 4-digit learning code is an agreed specified value for the transmitting terminal to perform matching learning.

Step S2, the transmitting terminal is powered on for the first time to generate a 24-bit random code.

Wherein, the random code is generated and saved only when the transmitting terminal is powered on for the first time, and the random code will not be changed in any subsequent control operations.

Step S3, take the upper 20 bits of the random code as the synchronous encryption calculation code, and take the lower 4 bits as the check calculation code.

Wherein, after the transmitting terminal obtains the synchronous encryption calculation code and the verification calculation code, it is stored, and in any subsequent control operation, the synchronous encryption calculation code and the verification calculation code will not be changed.

Step S4, the transmitting terminal transmits the 48-bit transmission data composed of 20-digit address code, 4-digit learning code, 20-digit synchronous encryption calculation code and 4-digit verification calculation code to the outside through radio.

Among them, among the transmitted 48-bit data codes, the sequence from high to low is: 4-bit verification calculation code, 20-bit synchronous encryption calculation code, 4-bit learning code, and 20-bit address code.

Step S5, receiving the external trigger of the terminal to enter the matching learning state.

Wherein, before performing the matching learning operation, the receiving terminal needs to use an external trigger such as a button to trigger the receiving terminal to enter the matching learning state.

Step S6, the receiving terminal extracts the 20-digit address code and the 4-digit learning code from the received wireless transmission data, and performs verification and comparison respectively.

Wherein, the address code taken out is compared with the address code stored in the receiving terminal, if the address code taken out does not exist, it indicates that the current matching learning operation is valid; for taking out the 4-digit learning code and representing the matching learning operation If the specified value is consistent, it indicates that the current matching learning operation is valid.

Step S7, the receiving terminal extracts a 20-bit synchronous encryption calculation code and a 4-digit verification calculation code from the received wireless transmission data.

Step S8, the receiving terminal saves the received address code, encrypted calculation code and check calculation code for address comparison, synchronization code decryption calculation and check calculation during normal control operation.

The technical scheme of matching learning between the transmitting terminal and the receiving terminal uses a specific matching learning operation to transmit the synchronous encryption calculation code and the check calculation code from the transmitting terminal to the receiving terminal, avoiding synchronization in frequent normal control operations The risk of leakage of encryption calculation code and verification calculation code; on the other hand, the 20-digit synchronous encryption calculation code and 4-digit verification calculation code are randomly generated when the transmitting terminal is powered on for the first time, thus avoiding the need for synchronous encryption calculation code and verification code. The risk of artificial leakage of computing code. Therefore, from the perspective of synchronous encryption calculation code and check calculation code generation and management perspective, the security of data transmission has been greatly improved.

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described above, and various obvious readjustments, changes and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention. The scope of the invention is determined by the scope of the appended claims.

Claims (9)

1. The wireless transmitting and receiving method for controlling the doors and windows is characterized by comprising the following steps of:

s1, a transmitting terminal generates a 20-bit address code, a 4-bit control code and a 20-bit synchronous code;

s2, after adding 1 to the 20-bit synchronous code, the transmitting terminal performs synchronous encryption calculation through the 20-bit synchronous encryption calculation code to generate an encrypted synchronous code;

s3, the transmitting terminal performs check calculation on 40-bit data consisting of the 20-bit synchronous code and the 20-bit synchronous encryption calculation code according to the check calculation code to obtain a 4-bit check code;

s4, the transmitting terminal transmits 48-bit transmission data consisting of a 20-bit address code, a 4-bit control code, a 20-bit encryption synchronous code and a 4-bit check code outwards through radio;

s5, the receiving terminal takes out a 20-bit address code and a 4-bit control code from the received 48-bit transmission data, and verifies and compares the address codes; the verification and comparison operation of the address codes is to compare the received 20-bit address codes with the address codes stored in the receiving terminal, and if the comparison is consistent, the received address codes are valid address codes;

s6, the receiving terminal decrypts the received 20-bit encryption synchronous code according to the synchronous encryption calculation code to obtain a 20-bit current synchronous code;

s7, the receiving terminal compares the current synchronous code obtained by decryption calculation with the synchronous code obtained in the previous control operation; the current synchronous code is larger than the synchronous code in the previous control operation, and the current control operation party is effective; when the receiving terminal is powered on for the first time, the initial value of the stored synchronization code of the previous control operation is taken as 0;

s8, the receiving terminal performs verification calculation on the 20-bit current synchronous code and the 20-bit synchronous encryption calculation code according to the verification calculation code to obtain a current verification code; the verification computing code adopted by the verification computing is obtained by matching learning of a transmitting terminal and a receiving terminal and is randomly generated when the transmitting terminal is electrified for the first time;

s9, the receiving terminal compares the current check code obtained by check calculation with the received 4-bit check code; the current check code is consistent with the comparison result of the received check code, and the current control operation party is effective;

s10, the receiving terminal determines whether the current control operation is effective according to the verification comparison result of the address code, the synchronous code and the check code, if so, the receiving terminal executes the control operation and stores the current synchronous code.

2. The method for wireless transmitting and receiving door and window control according to claim 1, wherein in step S1, the 20-bit address code and the 4-bit control code adopt 1527 fixed coding format to form encoded low 24 bits of transmitted data; the 20-bit sync code is gradually increased from 0 to 1048576 every time the transmitting terminal performs a control operation.

3. The method for wireless transmitting and receiving door and window control according to claim 1, wherein in the 48-bit transmission data in step S5, the order from high to low is: a 4-bit check code, a 20-bit encryption synchronous code, a 4-bit control code and a 20-bit address code; the transmission is performed by 433MHz or 315 MHz.

4. The method for wireless transmitting and receiving door and window control according to claim 1, wherein the synchronous encryption calculation codes in the steps S2 and S6 and the check calculation codes in the steps S3 and S8 are obtained by matching learning by a transmitting terminal and a receiving terminal, and are randomly generated when the transmitting terminal is powered on for the first time.

5. The door and window control wireless transmitting and receiving method according to claim 4, wherein the matching learning of the transmitting terminal and the receiving terminal comprises the steps of:

s1, a transmitting terminal generates a 20-bit address code and a 4-bit learning code;

s2, the transmitting terminal is electrified for the first time to generate 24-bit random codes;

s3, taking the high 20 bits of the random code as a synchronous encryption calculation code and the low 4 bits as a check calculation code;

s4, the transmitting terminal transmits 48-bit transmission data consisting of a 20-bit address code, a 4-bit learning code, a 20-bit synchronous encryption calculation code and a 4-bit check calculation code outwards through radio;

s5, the receiving terminal is triggered to enter a matching learning state externally;

s6, the receiving terminal takes out the 20-bit address code and the 4-bit learning code from the received wireless transmission data and respectively performs verification and comparison;

s7, the receiving terminal takes out a 20-bit synchronous encryption calculation code and a 4-bit check calculation code from the received wireless transmission data;

and S8, the receiving terminal stores the received address code, the encryption calculation code and the verification calculation code, and is used for address comparison, synchronous code decryption calculation and verification calculation in normal control operation.

6. The door and window control wireless transmitting and receiving method according to claim 5, wherein in the step S1 of the transmitting terminal and the receiving terminal through matching learning, the specific value of the 4-bit learning code is a specified value agreed for the transmitting terminal to perform matching learning; in step S2, the random code generation is generated and stored only when the transmitting terminal first generates power, and the random code is not changed any more in any control operation later.

7. The door and window control wireless transmitting and receiving method according to claim 5, wherein in the step S4 of the transmitting terminal and the receiving terminal through matching learning, the sequence of the transmitted 48-bit transmission data from high to low is: a 4-bit check calculation code, a 20-bit synchronous encryption calculation code, a 4-bit learning code and a 20-bit address code; the transmission is performed by 433MHz or 315 MHz.

8. The door and window control wireless transmitting and receiving method according to claim 5, wherein in the step S5 of the transmitting terminal and the receiving terminal through the matching learning, the receiving terminal is externally triggered to enter the matching learning by means of an external trigger button.

9. The method for controlling wireless transmitting and receiving doors and windows according to claim 5, wherein in step S6 of the transmitting terminal and the receiving terminal through matching learning, the verification and comparison of 20-bit address codes are to compare the extracted address code with the address code stored in the receiving terminal, and if the extracted address code does not exist, the current matching learning operation is indicated to be valid; the verification comparison of the 4-bit learning code is to compare the extracted 4-bit learning code with the designated numerical value representing the matching learning operation, and if the obtained 4-bit learning code is consistent with the designated numerical value representing the matching learning operation, the current matching learning operation is indicated to be effective.

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