Completed the Installation paragraph

Added an example graph

README.md

@@ -2,11 +2,27 @@
 
 This is a telegram bot hosted by a Raspberry Pi equipped with a temperature and humidity sensor. The bot is capable of sending plots and readings.
 
-The [python-telegram-bot](https://github.com/python-telegram-bot/python-telegram-bot) library was used to make the telegram bot.
+![graph example](https://i.imgur.com/YO6baGM.jpeg)
+
+
+## Structure
+
+This project is composed of 3 main files:
+- `bot.py` is used to host the telegram bot.
+- `graph.py` contains the `Graph` class, used to make graphs.
+- `sensor.py` contains the `TemperatureSensor` class, used to write and read from the sqlite3 database, as well as the
+function that reads the temperature and humidity values from the sensor.
+
+`bot.py` will call both the `Graph` and `TemperatureSensor` classes.
+
 
 ## Installation
 
-The following installation guide is divided in 3 phases.
+### Dependencies
+
+- [Adafruit_DHT](https://github.com/adafruit/Adafruit_Python_DHT)
+- [matplotlib](https://matplotlib.org/stable/users/installing.html)
+- [python-telegram-bot](https://github.com/python-telegram-bot/python-telegram-bot)
 
 #### Raspberry Pi setup
 
@@ -24,37 +40,61 @@ Once your sensor is connected to your Raspberry Pi, go ahead and proceed to [ins
 #### raspy-temperature-bot installation
 
 To install raspy-temperature-bot:
+
 1. Ssh into your Raspberry Pi
 ```bash
 ssh pi@raspberrypi.local
 ```
+
 2. Clone the repository
 ```bash
 git clone https://github.com/Kirgnition/raspy-temperature-bot.git
 ```
-3. Paste your [bot token](https://core.telegram.org/bots#6-botfather) in the `TOKEN.py` file
-4. 
-
-#### Telegram bot setup
-
-
-## Structure
-
-This project is composed of 3 main files:
-- `bot.py` is used to host the telegram bot.
-- `graph.py` contains the `Graph` class, used to make graphs.
-- `sensor.py` contains the `TemperatureSensor` class, used to write and read from the sqlite3 database.
-
-`bot.py` will call both the `Graph` and `TemperatureSensor` classes.
+3. Paste your [bot token](https://core.telegram.org/bots#6-botfather) in the `TOKEN.py` file.
+
+4. Create a service for the temperature sensor:
+   1. Create a file called `temperature_sensor.service`:
+      ```bash
+      sudo nano /etc/systemd/system/temperature_sensor.service
+      ```
+   2. Paste the following:
+      ```
+      [Unit]
+      Description=ROT13 demo service
+      After=network.target
+      StartLimitIntervalSec=0
+      
+      [Service]
+      Type=simple
+      Restart=always
+      RestartSec=1
+      User=username
+      ExecStart=python3 /path/to/sensor.py
+
+      [Install]
+      WantedBy=multi-user.target
+      ```
+      Set your username after `User=` and the path to `sensor.py` after `ExecStart=`.
+
+   3. Enable the service by issuing on the terminal:
+      ```bash
+      systemctl start temperature_sensor.service
+      systemctl enable temperature_sensor.service
+      ```
+      From the moment you start the service a reading will be taken by the sensor every 5 minutes and saved in a
+      sqlite3 database.
+
+5. Create a service for the telegram bot in an analogous way.
+
+Your bot should be now active, in case of restart both the bot and the sensor will start automatically.
 
 ## Usage
 
-Once the bot is installed and running, send the `/start` command on telegram to receive a set of instructions.
+Once the bot is installed and running, send the `/start` command on telegram to receive the list of available commands.
 
 ## Contributing
 Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.
 
-Please make sure to update tests as appropriate.
 
 ## License
 [MIT](https://choosealicense.com/licenses/mit/)