Tempsense

A Telegram Bot that controls IOT devices on a Raspberry Pi Zero W and brings API data to the chat.

background: This project was first developed to monitor a server room's temperature using telegram bot to receive the values. As the time didn't help at that moment, I didn't finish the project. But now let's go.

Today it's a bot with multi-functions and programmable to receive more functions.

Materials:

1. Any Raspberry Pi - I'm using Raspberry Pi Zero W on headless
2. DHT11 temperature and humidity sensor
3. BC548 Transistor
4. 10k Ohms Resistor
5. 5VDC Relay module - 110/220VCC
6. Telegram Bot API token

• Create with @BotFather on Telegram and it will give you the bot token
• Enable inline commands and make the ones you want

Build system

Run pinout on raspberry's terminal to see which pin to connect - see map of the GPIO to see the connections.

• Install pip

sudo apt install python3-pip

• Install Adafruit DHT

pip3 install Adafruit_DHT

• Install Telepot

pip3 install telepot

• Install Python dotenv

pip3 install python-dotenv

• Copy scripts to raspberry pi home

./tempsense/settg.sh

• On Raspberry home, run ./start.sh to begin the application, ./stop.sh to stop and ./psaux.sh to check if the application stopped.

Now just chat with the bot or add it on a group or channel. Functions below!

I'm leaving the other files to further study, so just ignore them - or don't.

Soon more info.

Autostart on boot

• Copy the service file to systemd directory

sudo cp tempsense.service /etc/systemd/system/

• Test to see if the script runs (you can stop it too)

sudo systemctl start tempsense.service

• Enable the autostart on boot

sudo systemctl enable tempsense.service

Any change on the system, remember to modify it on the service file.

Bot commands

• /temperature - Verifies the room's temperature 🌡
• /lumiere - Allumer la lampe 💡
• /led - Accendere il LED 🔦
• /naozhong - Dǎkāi nàozhōng ⏰
• /fala - Conversas aletórias 🗣️
• /miseru - 写真を見せる 📸
• /dailyinfo - Info about the mars or astronomy picture of the day 📝
• /astronomydaily - The astronomy picture of the day 🔭
• /marsdaily - The latest mars picture 🚀
• /listagem - Listagem de los comandos disponibles 📜
• /whoami - 🗣️

extra: /update - updates within repository

Electronic schematic

This is the transistor BC548 used to toggle 3v3 to the input of the relay.

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What's new

2023

• Add echo function
• Add dot env file - pass the token and chat ID there
• Add alarms functions
• Add new temperature function based on time
• Allow only known IDs
• Allow to update through git in outside network [in progress]

2022

• New component -> relay (inside messages module).
• Now you can control something through a command in Telegram, like a lamp, some system, etc.
• In the way to do some IOT smart thing whatever.

2021

• New script with Telegram bot. Interact with a bot to get temperature and humidity values.

References

• Raspberry GPIO pinout
• ASCII art with python
• Documentation learnt from @mislav poignant-guide repo
• Markdown mastering
• ADAFRUIT-DHT install
• ADAFRUIT-DHT python install
• DHT on adafruit example
• DHT on adafruit examples 2
• Telepot documentation
• File manager with python
• Dot env documentation
• Autostart on boot

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WARNING: I don't know why, but if you add the bot already running in a group, the code AND the bot cracks, and it stops working forever, I lost like 4 bots doing that. If you know why please contact me or send and issue or PR i dunno. Thanks a lot!