raspi-temp

Raspberry Pi 3 Temperature logger

Setup raspi

Edit wpa_supplicant.conf with your own Wi-Fi SSID and password. And copy this wpa_supplicant.conf and ssh files to the SD card root

country=US
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1

network={
	scan_ssid=1
	ssid="SSID"
	psk="password"
}

Log in to your raspi through Putty and change password, hot name, set locale settings and time zone,expand Debian file system, enable interfaces, etc.

Make raspi IP static

sudo nano /etc/dhcpcd.conf

Add to the end this, and modify it to your needs before editing:

interface wlan0

   static ip_address=192.168.1.201/24
   static routers=192.168.1.1
   static domain_name_servers=192.168.1.1

Install Python

sudo apt install python3 python3-venv
# install pip3 too if needed
dpkg --get-selections | grep python3
sudo apt-get install python3-pip -y
pip3 list

Install Samba

Easy to share files with PC, so you can edit the archives in your raspi from your PC with the editor or your like.

sudo apt-get install samba samba-client cifs-utils

mkdir ~/share
sudo chmod -R 777 /home/pi/share

Edit config file and add/modify to match bellow:

sudo nano /etc/samba/smb.conf

#In the PC you'll see the [pishare] folder
[PiShare]
   comment=Raspberry Pi Share
   path=/home/pi/share
   browseable=yes
   writeable=yes
   only guest=no
   create mask=0777
   directory mask=0777
   public=no

Add pi user to samba with same password as pi:

sudo smbpasswd -a pi
sudo service smbd restart

Install Apache and PHP

sudo apt install apache2

Give access right to apache files:

sudo chown -R pi:www-data /var/www/html/
sudo chmod -R 770 /var/www/html/

Check apache is working:

wget -O check_apache.html http://127.0.0.1
cat ./check_apache.html

So now /var/www/html is the root of your websites.

Backup old index.html if needed:

sudo mv /var/www/html/index.html /var/www/html/index.old.html
ls /var/www/html/

You can browse this link http://192.168.1.201/index.old.html to see the old apache index.html file. Now proceed to install PHP

sudo apt install php php-mbstring

Remove index.html

sudo rm /var/www/html/index.html

Create new index.php

echo "<?php phpinfo ();?>" > /var/www/html/index.php

Set up Temperature Logger Website

Copy your website to share/php/temp folder, should have this structure.

#Create website source folder

mkdir share/php/temp

pi@raspberry:~ $ tree share/php/temp
share/php/temp
├── css
├── favicon.ico
├── get_temp.php
├── img
├── index.html
├── index.php
├── js
│   └── app.js
├── launcher.sh
├── libs
│   ├── bootstrap
│   │   ├── css
│   │   │   ├── bootstrap.css
│   │   │   ├── bootstrap.css.map
│   │   │   ├── bootstrap-grid.css
│   │   │   ├── bootstrap-grid.css.map
│   │   │   ├── bootstrap-grid.min.css
│   │   │   ├── bootstrap-grid.min.css.map
│   │   │   ├── bootstrap.min.css
│   │   │   ├── bootstrap.min.css.map
│   │   │   ├── bootstrap-reboot.css
│   │   │   ├── bootstrap-reboot.css.map
│   │   │   ├── bootstrap-reboot.min.css
│   │   │   └── bootstrap-reboot.min.css.map
│   │   └── js
│   │       ├── bootstrap.bundle.js
│   │       ├── bootstrap.bundle.js.map
│   │       ├── bootstrap.bundle.min.js
│   │       ├── bootstrap.bundle.min.js.map
│   │       ├── bootstrap.js
│   │       ├── bootstrap.js.map
│   │       ├── bootstrap.min.js
│   │       └── bootstrap.min.js.map
│   ├── canvasjs
│   │   ├── canvasjs.min.js
│   │   ├── canvasjs.react.js
│   │   ├── instruction.txt
│   │   └── jquery.canvasjs.min.js
│   └── jquery
│       ├── jquery-3.4.1.min.js
│       ├── jquery-3.4.1.min.map
│       └── jquery-migrate-3.1.0.js
├── LICENSE
├── new features.txt
├── py
│   └── temps.py
├── README.md
├── ssh
└── wpa_supplicant.conf

Everytime you update your source folder files in share/php/temp you should copy to the Apache PHP folder with:

	#One time
	mkdir /var/www/html/temp
	cp share/php/temp/favicon.ico /var/www/html/temp/favicon.ico
	
	#Every time you update files
	cp -r -v share/php/temp/libs/ /var/www/html/temp/
	cp -r -v share/php/temp/js/ /var/www/html/temp/
	cp -r -v share/php/temp/css/ /var/www/html/temp/
	cp -r -v share/php/temp/img/ /var/www/html/temp/

	cp share/php/temp/index.php /var/www/html/temp/index.php
	cp share/php/temp/get_temp.php /var/www/html/temp/get_temp.php
	cp share/php/temp/index.html /var/www/html/temp/index.html

Follow instructions in launcher.sh to execute service every minute. This service calls share/php/temp/py/temps.py Python file, and it updates the file share/php/temp/py/temps.txt with temperatures every minuite.

You should be able to see the result in your PC or Mobile browser

Desktop	Mobile

Next step is to start fan when temperature is over a threshold.