avazbekabdurafikov/esp32

Introduction to ESP32

What is a Microcontroller?

• Imagine a tiny computer that can be programmed to perform specific tasks.
• Microcontrollers are used in a wide range of electronic devices, from your TV remote to your microwave.

Introducing the ESP32

• The ESP32 is a powerful microcontroller developed by Espressif Systems.
• It's not just any microcontroller; it's like a mini-computer with built-in Wi-Fi and Bluetooth capabilities.

Understanding ESP32 Features

What Can ESP32 Do?

• The ESP32 can perform a variety of tasks, including
  • Processing data and making decisions (like a brain).
  • Connecting to Wi-Fi networks to access the internet.
  • Communicating with other devices via Bluetooth.
  • Interfacing with sensors, motors, and other components.

• Key Features of ESP32
  • Dual-core processor for faster performance
  • Integrated Wi-Fi (802.11b/g/n) for wireless internet connectivity.
  • Dual-mode Bluetooth (Classic and BLE) for communication with other devices.
  • GPIO pins for connecting to external components like sensors, LEDs, and displays.

Parameter	Specification
Wireless Protocol	Wireless 802.11b/g/n standard
Bluetooth Version	BLE 4.0
Operating Frequency	2.4 GHz to 2.5 GHz
Data Transmission Rate	150 Mb/s
Output Power	20 dBm
Operating Voltage	2.7 – 3.6V
Operating Temperature	-40 to 85 °C
Dimension	52 mm x 28 mm x 14 mm
Weight	10 g

• Development board based on ESP-WROOM-32 module (DOIT version)
• 30 GPIOs
• ESP32 is a dual core 32-bit processor with built-in 2.4 GHz Wi-Fi and Bluetooth
• 4MByte flash memory
• 520KByte RAM
• 2.2 - 3.6V Operating voltage range
• In breadboard friendly breakout
• USB microB for power and Serial communication, use to load program and serial debugging too

Why Choose ESP32?

• Advantages of ESP32
  • Versatility: The ESP32 can be used in a wide range of applications due to its powerful features.
  • Connectivity: Its built-in Wi-Fi and Bluetooth capabilities enable seamless communication with other devices.
  • Low Power Consumption: Despite its capabilities, the ESP32 is energy-efficient, making it suitable for battery-powered devices.
  • Community Support: There's a large and active community of developers sharing resources, libraries, and tutorials for the ESP32.

Exploring ESP32 Pins

• Physical Layout

  • The ESP32 comes in various development boards, each with its own layout of pins.
  • These pins serve as connection points for interfacing with external components.

• Pin Functions

  • Different pins have different functions, such as input, output, power, and communication.
    • Understanding the pinout diagram is crucial for connecting external components correctly.

    Understanding ESP32 Pins

  

Power & Control

Pin Name	Function
VIN	The input of the 3.3V positive voltage regulator. Supply voltage in the range of 4 to 12V.
3.3V	Output from the voltage regulator. You can also supply 3.3V to this pin if you have one. But do not supply both VIN and 3V3 together.
GND	Ground (Negative) supply pins.
ENABLE	This is the reset pin. Connecting this pin to GND will reset the ESP32. This pin is normally pulled-up. The EN button will pull it LOW when you press it.

GPIO(GENERAL PURPOSE INPUT OUTPUT)

There are 34 GPIO pins available on the ESP32 chip. These pins are named from 0 to 39.

GPIO	Input?	Output?	Notes
0	NO	YES	Pull LOW to enter bootloader mode.
GPIO1(TX0)	NO	YES	TX0 of serial port for programming and printing debug messages.
GPIO2(D2)	YES	YES	Connected to the onboard LED, must be left floating or LOW to enter flashing mode.
GPIO3(RX0)	YES	NO	RX0 of serial port for programming and printing debug messages.
GPIO4(D4)	YES	YES	Strapping pin
GPIO5(D5)	NO	NO	Flash memory interface. Do not use.
6	NO	NO	Flash memory interface. Do not use.
7	NO	NO	Flash memory interface. Do not use.
8	NO	NO	Flash memory interface. Do not use.
9	NO	NO	Flash memory interface. Do not use.
10	NO	NO	Flash memory interface. Do not use.
11	NO	NO	Flash memory interface. Do not use.
GPIO12(D12)	YES	YES	Strapping pin. Booting can fail if pulled HIGH (for 3.3V memories) due to brownout.
GPIO13(D13)	YES	YES
GPIO14(D14)	YES	YES
GPIO15(D15)	YES	YES	Pulling LOW mutes the debug messages through the serial port.
GPIO16(RX2)	YES	YES
GPIO17(TX2)	YES	YES
GPIO18(D18)	YES	YES
GPIO19(D19)	YES	YES
20	-	-
GPIO21(D21)	YES	YES
GPI022(D22)	YES	YES
GPIO23(D23)	YES	YES
24	-	-
GPIO13(D25)	YES	YES
GPIO26(D26)	YES	YES
GPIO27(D27)	YES	YES
28	-	-
29	-	-
30	-	-
31	-	-
GPIO32(D32)	YES	YES
GPIO33(D33)	YES	YES
GPIX34(D34)	YES	NO	Input only
GPIX35(D35)	YES	NO	Input only
GPIX36(VP)	YES	NO	Input only
37	-	-
38	-	-
GPIX39(VN)	YES	NO	Input only

• GPIO 20, 24, 28, 29, 30, 31, 37, 38 pins do not exists!!!

Programming the ESP32

• Supported Languages

  • You can program the ESP32 using various languages and frameworks, including:
    • Arduino IDE: A beginner-friendly environment with a vast library of pre-written code.
    • MicroPython: A Python-based language for rapid prototyping and experimentation.
    • ESP-IDF: A framework for more advanced users who want low-level control over the ESP32.
    • PlatformIO: An essential tool for working with the ESP32 microcontroller.

• Setting Up Development Environment

  • To start programming, you need to set up the development environment on your computer.
  • This involves installing the necessary software, such as the IDE and relevant libraries.

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Now we Set up PlatformIO in VS code IDE

1. Install Visual Studio Code:

• If you haven't already, download and install Visual Studio Code from the official website: Visual Studio Code

2. Open Visual Studio Code:

• Launch Visual Studio Code after installation.

3. Install PlatformIO Extension:

• In Visual Studio Code, navigate to the Extensions view by clicking on the square icon on the sidebar or by pressing Ctrl+Shift+X.

• Search for "PlatformIO IDE" in the Extensions Marketplace.

• Click on the "Install" button next to the PlatformIO IDE extension.

4. Restart Visual Studio Code:

• After the installation is complete, you'll be prompted to restart Visual Studio Code. Click on the "Reload" button to restart the editor.

5. Verify PlatformIO Installation:

• Once Visual Studio Code restarts, you should see a new icon on the sidebar labeled "PlatformIO". Click on it to open the PlatformIO Home view.

6. Optional: Configure PlatformIO Settings (if needed):

• You can configure PlatformIO settings by clicking on the gear icon in the PlatformIO Home view.
• Here you can specify default settings for projects, environments, libraries, and more.

7. Create or Open a Project:

• To create a new PlatformIO project, click on the "New Project" button in the PlatformIO Home view.
• To open an existing project, click on the "Open Project" button and select the project folder.

8. Start Developing:

• You're now ready to start developing with PlatformIO in Visual Studio Code! You can write code, compile, upload, and debug your projects directly from the editor.

Development Boards

Name	Chip	Description
ESP32-DevKitC V4	ESP32	Entry-level ESP32 development board
ESP32 Devkit v1	ESP32	Popular ESP32 development board
ESP32-S2-DevKitM-1	ESP32-S2	Entry-level ESP32-S2 development board
Franzininho WiFi	ESP32-S2	Board by the Franzininho Community
Wemos S2 mini	ESP32-S2	Small ESP32-S2 board by Wemos
ESP32-S3-DevKitC-1	ESP33-S3	Entry-level EPS33-S3 development board
ESP23-C3-DveKitM-1	EPS23-C3	Entry-level EPS23-C3 development board
Rust Board EPS23-C3	EPS23-C3	EPS23-C3 board designed for Rust trainings
EPS23-C6-DveKitC-1	EPS26	Entry-level EPs26 development board
EPS23-HZ-DveKitM-I	EPs22-HZ	Entry-level EPs22-HZ Development Board (beta)
EPS24-Peview-DvekitC-I	EPs24-P4	EPs24-P4 pre-release virtual evaluation board (alpha)

Resources

• Official Espressif Website
• ESP32 Documentation
• ESP32 Arduino Core Documentation
• MicroPython Documentation for ESP32
• ESP-IDF Documentation