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   源码介绍

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Part 2: The 35 euro IoT project
3
Inhoudsopgave
1 Preface......................................................................................................................................... 2
2 The concept................................................................................................................................. 5
2.1 Accountability.......................................................................................................................... 5
2.2 Prescience................................................................................................................................ 6
2.3 Reading guide.......................................................................................................................... 6
2.4 Abbreviations .......................................................................................................................... 6
2.5 Version management.............................................................................................................. 6
3 Hardware..................................................................................................................................... 7
3.1 Inleiding ................................................................................................................................... 7
3.2 ESP32....................................................................................................................................... 7
3.3 Hardware................................................................................................................................. 8
3.3.1 Used hardware ................................................................................................................ 8
3.3.2 Hardware schema............................................................................................................ 8
3.3.3 DHT22 and level shifter................................................................................................... 9
3.3.4 Geekcreit® ESP32 Development Board ......................................................................... 10
4 Software .................................................................................................................................... 11
4.1 Introduction........................................................................................................................... 11
4.2 Installatie van GIT.................................................................................................................. 11
4.3 Installatation of the ESP32 Core............................................................................................ 17
4.4 Installation of the Xtensa and ESP32 Tools........................................................................... 17
4.5 Python ................................................................................................................................... 18
4.5.1 Install Python................................................................................................................. 18
4.5.2 Installation of pySerial and EspTool .............................................................................. 21
4.6 Test the software installation................................................................................................ 22
5 The ESP32 IoT project................................................................................................................ 27
5.1 Introduction........................................................................................................................... 27
5.1.1 WiFi connection............................................................................................................. 27
5.1.2 Setup date and time ...................................................................................................... 27
5.1.3 MQTT connection.......................................................................................................... 27
5.1.4 Determining temperature and humidity....................................................................... 27
5.2 IOT_ESP32_Project source .................................................................................................... 28
6 Test............................................................................................................................................ 35
6.1 Introduction........................................................................................................................... 35
Part 2: The 35 euro IoT project
4
6.2 ESP32, NodeJS, MongoDB en Mosca..................................................................................... 35
6.2.1 Start MongoDB.............................................................................................................. 35
6.2.2 Start NodeJS Express serve and Mosca broker ............................................................. 36
6.2.3 Start the ESP32 .............................................................................................................. 36
6.2.4 Start an Chrome browser.............................................................................................. 39
7 Index .......................................................................................................................................... 40