Full duplex wireless communication module based on 433MHz

Abstract

The invention relates to a full duplex wireless communication module based on the 433MHz. Each period of time is divided into a sending cycle and a receiving cycle by the module, the switch of the sending status and the receiving status will be freely carried out by the module according the time period it is in. At the beginning of each sending stage, the timing sequence synchronization packets are sent by the module, the timing sequence and the communication on the other side are synchronized, after the synchronization packet from the other party is received by the module, the receiving time period will begin to be calculated again. That is, the communication parties will align the time phase on their own without stop, while ensuring that when one party is in the sending state, the other party is in the receiving state; for the implementation of the time division duplex, according to the above core content, the switch cycles of the modules for sending and receiving are shortened, the switch frequency is much greater than the speed rate of the data sent by a user. The full duplex wireless communication module will automatically carry out the synchronization operations, the user can be informed on the communication link quality and status, the debugging cost of the user at an early stage is reduced, and the user is ensured that losses of data due to the user unable to carry out communication operations when it is impossible to communicate cannot happen.

Description

technical field [0001] The invention relates to a full-duplex wireless communication module based on 433MHz, belonging to the technical field of wireless communication. Background technique [0002] Most of the 433MHz wireless communication modules currently in existence are half-duplex communication inventions. The working principle of most existing wireless communication modules is that at the same time, a module can only work as a receiver or sender on a channel with a fixed frequency point. Such as figure 1 As shown, using the wireless communication module of this invention, the user will set the working channel of the module in advance and ensure that the module is within the effective communication range to ensure the reliability of the communication link. When working, the module is in the normal receiving state. The user sends data to the module through the serial port and other interfaces. After receiving the data from the user, the module switches to the sending ...

AI Technical Summary

Problems solved by technology

Defects and deficiencies: users need to choose the channel by themselves. In this way, interference from the same channel cannot be avoided. If there is a common source of interference (such as another group of modules working at the same frequency, etc.), the entire wireless communication link will be very unstable. reliable, unstable

When communication fails, the user needs to check the communication parties and the wireless environment to determine the location of the fault, which increases maintenance costs

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