以藍牙通訊為基礎之環境感測系統設計

NHUIR > College of Science and Technology > Master Program of Green Technology for Sustainability > Disserations and Theses > Item 987654321/28397

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Title:	以藍牙通訊為基礎之環境感測系統設計
Other Titles:	Design of Environmental Sensing System based on Bluetooth Communication
Authors:	洪禎甫 HUNG, CHEN-FU
Contributors:	科技學院永續綠色科技碩士學位學程賴信志 LAI, SHIN-CHI
Keywords:	藍牙一對多;環境感測;溫室 Bluetooth one-to-many;Environmental sensing;greenhouse
Date:	2019
Issue Date:	2022-05-23 15:35:53 (UTC+8)
Abstract:	本研究基於藍牙實現一對多傳輸來搭配感測器感知室內環境狀況，利用藍牙4.0短距省電的特性，能有效進行室內溫溼度等感測數值的傳遞，使其能運用在溫室或自家小型溫室。本系統將針對最下游感測器節點做一個資料彙整中心，透過藍牙4.0模組互相溝通，將從端感測電路放置溫室內各個角落，或放置於多個小型溫室內，用以監測室內空間的各處環境數值。實作藍牙以一對多連線來主動輪詢各個從端裝置，並回傳到主端電路上傳資料庫供APP顯示。從端藍牙非傳輸時處於休眠模式，其耗電流為50-200uA，此時從端模組總電流為17mA，能有效地省下耗電量。透過開發藍牙一對多的切換方式來將感測器端溫度、濕度及照度傳送給主端匯集電路，主端電路大小為80mm×85mm，據有LCD顯示面板可呈現目前輪詢到的從端數據及時間，同時也具備WiFi模組，將環境數據上傳到雲端資料庫，且使用者可透過手機APP監測各節點環境數據。經過測試藍牙4.0單一節點完整蒐集一次資料需要1.1秒，若切換連接四個節點依然相當地快速，將藍牙一對多應用於溫室環境監控，更有利於管理者更方便監控溫室內部的環境變化。　　This study uses Bluetooth to implement one-to-many transmissions to match the sensor to sense the indoor environment. Using Bluetooth 4.0's short-range power-saving features, it can effectively transmit indoor temperature and humidity and other sensing values, making it applicable to greenhouses or home-use greenhouse. This system will be a data collection center for the most downstream sensor nodes, communicate with each other through Bluetooth 4.0 modules, and place the end-sensing circuits in every corner of the greenhouse, or in multiple small greenhouses to monitor the indoor space Environmental values around. The implementation of Bluetooth actively polls each slave device with a one-to-many connections, and returns it to the master circuit to upload a database for display by the APP. The slave Bluetooth is in sleep mode when it is not transmitting, and its current consumption is 50-200uA. At this time, the total current of the slave module is 17mA, which can effectively save power consumption. Through the development of a Bluetooth one-to-many switching method, the temperature, humidity and illuminance of the sensor end are transmitted to the master end collection circuit. The size of the main end circuit is 80mm × 85mm. According to the LCD display panel, it can present the currently polled slave end. Data and time, and there is also a WiFi module to upload environmental data to the cloud database, and users can monitor the environmental data of each node through the mobile APP. After testing Bluetooth 4.0, it takes 1.1 seconds for a single node to fully collect data. If four nodes are switched and connected, it is still quite fast. Applying Bluetooth one-to-many to the monitoring of the greenhouse environment is more conducive for managers to more easily monitor the environmental changes inside the greenhouse.
Appears in Collections:	[Master Program of Green Technology for Sustainability] Disserations and Theses

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