Lora acquisition device and its acquisition method based on tdma and contiki

Abstract

The invention discloses a LoRa acquisition device based on TDMA and Contiki, comprising a management control module and a peripheral function module, the management control module comprising a Contiki OS platform and a time management unit connected to the Contiki OS platform, a configuration management unit, A data management unit and a communication management unit, the peripheral function modules include a debugging / configuration module connected to the configuration management unit, an RS485 module connected to the data management unit, and a LoRa module connected to the communication management unit group; the present invention also discloses a collection method of a LoRa collection device based on TDMA and Contiki, and the present invention has the characteristics of precise time control and excellent ability to avoid communication conflicts.

Description

technical field [0001] The invention relates to the technical field of Internet of Things data collection, in particular to a LoRa collection device and collection method based on TDMA and Contiki. Background technique [0002] At present, the commonly used transmission methods of IoT acquisition equipment mainly include GPRS, CDMA, LTE, NB-IoT, LoRa, etc., while GPRS, CDMA, LTE, and NB-IoT methods usually require each acquisition terminal to be equipped with a network connection module and a The IoT card increases the cost, and choosing LoRa communication can adopt another solution: multiple nodes first transmit data to the gateway, and then the gateway transmits the data to the background through the network, which greatly reduces the number of network communication modules , to reduce application costs, very suitable for application scenarios where the amount of communication data is not large and the transmission distance is long, and many Internet of Things acquisitions...

AI Technical Summary

Problems solved by technology

[0004] (1) The time slot control for multiple terminal nodes is relatively rough or not, and communication conflicts are prone to occur, which limits the number of effective communication terminals in the transmission cycle, and the utilization rate of the time cycle is low;

[0005] (2) The handling of communication conflicts is relatively simple, and the conflict problem is more obvious when the number of terminal nodes is large;

[0006] (3) Generally, acquisition terminals are low-power devices with a large number of devices, and the performance and resources of the main control chip are very limited, so bare-metal program development is adopted, but the difficulty of bare-metal development increases sharply when dealing with complex logic problems

[0007] Problems (1) and (2) limit the number of terminals connected to a single gateway, and problem (3) limits the business capabilities of terminals

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