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Humidity and Temperature monitoring system using an IoT network (school project).

Node MCUs reading humidity and temperature using DHT22 are connected to a Raspberry Pi Wirelessly to which they send the data to

• Getting started
  • Node MCU
  • Raspberry pi
• Software map
• Changelog
• To do / ideas

1. Download Arduino IDE (> 1.8.7 )Here
2. Install USB drivers, downloadHere
3. Add this to the “Additional Boards Manager URLs” in the Arduino IDE

   http://arduino.esp8266.com/stable/package_esp8266com_index.json

4. Restart the Arduino IDE
5. Go toTools -> Board -> Boards Manager and install theesp8266 package by ESP8266 Community
6. Restart the Arduino IDE
7. Change the current board toGeneric ESP8266 Module under the tools menu
8. Under tools, make sure this settings are selected:

• Flash Mode = QIO
• Flash Frequency = 40MHz
• CPU Frequency = 80MHz
• Flash Size = 4M 1M SPIFFS
• Reset Method = nodemcu
• Upload Speed = 115200

9. Download these libraries fromSketch -> Include Library -> Libraries Manager

• Adafruit Unified Sensor by Adafruit
• DHT Sensor Library by Adafruit

10. Select the correct port under the Tools menu
11. Change the variables values to your liking and upload thenodemcu_sketch/nodemcu_sketch.ino sketch to the board

1. Install Raspbian
2. Download this repository
3. Go to theraspberry/auto folder and open the terminal
4. Set the sh files as executable with this command:

   find . -type f -iname "*.sh" -exec chmod +x {} \;

5. Change these variables to your liking in theautoinstall.sh file

   mysqlpass : password for mysql (user is root)touchdevice : device with touch inputhostapd_ip : static ip of raspberry pihostapd_ssid : name of the Access Pointhostapd_password : password to connect to the AP

6. Execute the file by entering this command:

   ./autoinstall.sh

The software map idea was abandoned because its hard to maintain it updated

Work in progress

2019-09-09 01_07:
Fixes:

• added the missing variables for CSS _cm_datepicker.php
• the autoinstall script also tries to install mysql usingapt-get install default-mysql-server becauseapt-get install mysql-server errors in latest raspbian version

  More infos here

• saveiptables() wasn't called in the autoinstall script

Other:

• better documentation

2019-04-25 01_06:
Features:

• Now you can add "x + room" classes to elements in the plan to make them clickable

2019-04-25 01_05:
Fixes:

• database connection errors are now shown instead of the map, they are also shown in an alert of the settings page

  Before this fix you had to use Dev Tools to know the problem and the settings page had weird blank parts

2019-04-24 01_04:
Features:

• Now you can add as many maps as you want in the /static/img/maps folder

2019-04-23 01_03:
Features:

• Added automatic installation script

2019-04-17 01_02:
Changes:

• Set limit of 1200 records

2019-03-21 01_01:
First commit

• OTA(over the air) updates

  Should it be used in production? It leeds to security issues

• SPIFFS + web server remote configuration

  Should it be used in production? It leeds to security issues

• WIKI with more infos/instructions

• Add support for other languages

• Unit Testing scripts (+CI automation with something likeTravis-ci)

• Dockerize web server

• Use Vue components instead of JS files

  this implies adding a build stage using something like webpack

• Don't have imports from imports(like db_connection.php imported by get_colorslist.phpimported by sendcolor.php )

  To do this an implementation of a "main" function/condition check is needed.if (!debug_backtrace()) {} should do the job.

  Also: PHP throws a "Fatal error" if a function has already been declared.To fix thisfunction_exists() is needed

• Use POST requests instead of GET requests where the frontend sends data to the backend

• Add a parameter to getdata.php (the php file that shows the sensors readings)that specifies of which sensor to get the data

• Add a login page and enable connections from outside LAN

  Figure out a way to register the user without enabling everyone to do it from the internet:during the installation there might be a promt that asks for the passwordthat gets encrypted and stored inside a new database table.A default password (that MUST BE CHANGED on the first login) could be used but its not ideal for security reasons

  A nice feature would be to add the ability to later change the passwordand create new accounts for trusted people (like family members)

  Obviously the rest API (all the PHP scripts that expose data) needs to be protected from un-authorized users as well as the UI

• Put all the database settings (database name and its table's names) inside a config fileor in a script that gets included

  Better maintainability: changing one name doesn't require changing every variable inside the PHP scripts

• Better naming "standardization" for PHP scripts: "get_xxxx.php" or "getxxxx.php" could be used for GET request responders,"sendxxxx.php"/"send_xxxx.php"/"postxxxx.php"/"post_xxxx.php" could be used for POST request responders,the utilities (like "db_connection.php" ) could be put inside an "utils" folder

• Changing the UI color doesn't effect the UI on other devices, while this could be a cool featurethe user expects that changing the UI color affects all the devices without having to reload their page

  websocket could be used to listen for the color change and reload the page

Zenaro Stefano(Github)