BUPT-QM-InnovationTutor_Group61

Project: Smart home model

Scenario

• Your company is requested to design and build a prototype of a smart home system that showcases
  • electronic installation (sensors, display, etc.)
  • a smart home web application for monitoring temperature and humidity, and control for security and comfort purposes.
• As extra functions, the system may check if the doors and windows are open or closed and detects movements for burglary intrusion and sounds an alarm if the sensor detects a movement.

Requirement

Instructions

Arduino

1. Downloading file

2. Opening A_Final_Arduino.ino file by Arduino IDE

   Address:

   ..\Telecommunications Engineering with Management\A_Final_Arduino\A_Final_Arduino.ino

3. Setting Board to Arduino Uno

   

4. USB Connects the Arduino board and sets the port. In my computer that is COM5

   

5. Uploading Code

ESP8266

1. Downloading file

2. Opening A_Final_ESP8266.ino file by Arduino IDE

   Address:

   ..\Telecommunications Engineering with Management\A_Final_ESP8266\A_Final_ESP8266.ino

3. Set Wifi information, including Wifi name, Wifi password, mqtt broker, subsribe topic

   

4. Setting Board to NodeMCU 1.0

   

   Attention: ESP8266 Board driver are needed to downloading in Borad Manager

   

5. USB Connects the Arduino board and sets the port.

6. Uploading

Telecommunications Engineering with Management

Circuit board naming

Arduino：Arduino Board/Sensor Board

ESP8266：Wifi Board/Central Board

Circuit board installation of the original and the role of the circuit board

Arduino

All sensors are mounted on the circuit board

• Sound transducer

• Ranging instrument (ultrasonic sensor)

• Luminance sensor

• Collision sensor

• Infrared sensor (body sensor)

• Temperature and humidity sensor

Function: All sensor information is transmitted to the ESP8266 circuit board ==every 5 seconds==

ESP8266

Installation original:

• buzzer
• RGB Light
• Infrared receiver (Remoter)
• Bluetooth receiver

Function:

① The messages transmitted by Arduino are disassembled, processed, spliced, and then sent to the server.

• disassembled
  • Separate collision, infrared (human), distance, and volume from the integrated information transmitted
• processed
  • Judge according to certain conditions ( hit == 1 || distance > 7 || detect == 1 || volume > 60). If the condition is met, the alarm is reported
• spliced
  • Remove collision and infrared (body) information
  • Spell the alarm information close to the original (Information transmitted by Arduino) information
  • Replace the color of the lamp with the default bit of the color information in the original (Arduino information) information
• Send to the server
  • Sends the spliced general information to the server
  • Topic: 61_Temperature_Humididy

② Install controllable components for control

• RGB Light
  • Realize through WIFI interconnection, webpage to light RGB three colors, nine colors of independent adjustment
  • Realize remote control to RGB light three colors, 9 colors of independent adjustment
  • Achieve bluetooth light RGB three colors, 9 colors of independent adjustment
• Alarm system
  • Realize the switch control of the alarm system through WIFI interconnection and web page

Alarm system

Realize the house to warn the intruder, to remind the owner. The alarm system can be remotely controlled on and off.

The alarm system is turned on by default at startup

After receiving the remote shutdown command, the alarm system will not give feedback to any information that can trigger the warning

The alarm system restarts automatically at regular intervals (currently set to one minute). Make sure the house is in a high state of security.

Explanation of the problem that the server contents cannot be updated in time when the controllable components are controlled by multiple control devices

Arduino sends a message to ESP8266 every 5 seconds

8266 does the operations mentioned above on the information after receiving it, and sends the message to the server. That is to say, 8266 will only send data to the server every 5 seconds

• Explanation of how to update status to server if other controllable variables (color and brightness of lamp) are changed by other control devices (Bluetooth or remote control) within 5 seconds:
  • The brightness of the lamp is not uploaded to the cloud, The brightness information in the cloud is the ambient brightness
  • The color of the lamp is updated by overwriting the reserved bits in the message sent by the Arduino before each message is sent to the server.
  • In other words, if any other device changes the message within 5 seconds, the server will not receive the update immediately, but will wait for the next time to receive it

Format description of messages sent to ESP8266 by Arduino

String information = "" +
                     String(hit) + ";" +
                     String(detect) + ";" +
                     String(brightness) + ";" +
                     "1" + ";" +
                     String(distance) + ";" +
                     String((int)DHT11.temperature) + ";" 
                     String((int)DHT11.humidity) + ";" +
                     String(volume);

The FORMAT of the message that the ESP8266 board sends to the server

String information = "" +
                     String(brightness) + ";" +
                     lightType + ";" +
                     String(distance) + ";" +
                     String((int)DHT11.temperature) + ";" 
                     String((int)DHT11.humidity) + ";" +
                     String(volume) + ";" +
    				         warning;