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It is clear that the main purpose of Raspberrypi was not to become a plc board or an industrial controller, however because of its enormous capabilities you can consider it as a cheap and reliable option at least for testing.

For my recent projects, i use often raspberrypi to interact through its gates to motors or sensors, however for specific goals, you need specific HATs (Hardware attached on top). Below is a list of possible HATS you can consider for your project:

some common categories of HATs that were available for the Raspberry Pi 4:

1. Sensor HATs: These HATs often include various sensors like temperature, humidity, motion, and light sensors. They are commonly used for IoT and environmental monitoring projects.
   • Here is one example of Sensor HATs:
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2. Motor and Robotics HATs: These HATs are designed for controlling motors, servos, and other robotics components. They are popular for building robots and automated systems.
   • Here is one example of motor Hat:
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3. Audio HATs: These HATs provide high-quality audio input and output capabilities for the Raspberry Pi. They are useful for audio playback, recording, and projects involving sound.
   • here is one exmple of Audio HAT:
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4. Display HATs: These HATs come with small displays, such as LCD or OLED screens, and are suitable for creating portable or small-scale display projects.
   • Here is one example of Display HAT:
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5. Power Management HATs: These HATs provide power management and uninterruptible power supply (UPS) functionality. They help keep your Raspberry Pi running smoothly, even during power outages.
   • Here is one example of Power managment HAT: ()
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6. Communication HATs: HATs with communication features like GSM, GPS, LoRa, or Zigbee are available to extend the connectivity options of the Raspberry Pi.
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   • LTE Cat 6 Communication HAT for Raspberry Pi
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7. Camera HATs: These HATs support additional cameras, allowing you to create multi-camera setups or use different types of cameras with your Raspberry Pi.
   • Here is one example of Camera HAT:
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8. PoE (Power over Ethernet) HATs: These HATs enable you to power your Raspberry Pi over Ethernet, simplifying cabling and installation in certain scenarios.
   • Here is one example of Power Over Ethernet
   • Waveshare 19445
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9. AI and Machine Learning HATs: Some HATs are designed to accelerate AI and machine learning workloads on the Raspberry Pi, often including hardware like accelerators or specialized neural network processing units (NPUs).
   • Adafruit BrainCraft HAT – Machine Learning for Raspberry Pi 4
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10. Custom HATs: Some makers and companies design their own custom HATs for specific applications. These may include unique features tailored to a particular project or use case.

There are many Custom made HATs for Raspberri Pi, But below is a HAT for RS485 Communication over CAN

I hope that you like This Article 🙂 Leave your comment below!