Schematic for ESP32-WROOM-32E Reference Design: This project is a...

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please explain what U1 does.

marcos080589

@copilot please explain what U1 does.

copilot

The

\text{ESP32-DEVKIT-V1}

, designated as

\text{U1}

in your project, is a development board featuring the ESP32 microcontroller. The ESP32 is a powerful and versatile microcontroller with integrated Wi-Fi and Bluetooth capabilities. It's commonly used for IoT applications where wireless connectivity is required. Here’s a breakdown of its main functionalities:

Wi-Fi and Bluetooth Connectivity: The ESP32 supports both Wi-Fi and Bluetooth, allowing for communication over networks and direct device communication via Bluetooth.
Multiple I/O Pins: It includes multiple digital I/O pins, which can be used for interfacing with various sensors and peripherals. The ESP32 also supports analog input through its ADC pins.
Serial Communication: The ESP32 provides several UART pins, which can be used for serial communication. In this reference design, UART is used via the CH340C for USB to serial conversion.
Voltage Regulation: Typically, the development boards have onboard voltage regulation to ensure the ESP32 receives stable power, either via USB or an external source.
Programmability: The device can be programmed using various development environments, including the Arduino IDE and Espressif’s own ESP-IDF.

If you have more specific questions about how it's used in your project, feel free to ask!

sda y scl cuales pines son?

marcos080589

@copilot sda y scl cuales pines son?

copilot

En tu proyecto, los pines de la pantalla OLED están asignados de la siguiente forma:

SDA (Serial Data Line): Pin 1 de OLED1
SCL (Serial Clock Line): Pin 2 de OLED1

La pantalla OLED utiliza estas líneas para la comunicación I2C. Si necesitas conectar estos pines a tu microcontrolador ESP32-DEVKIT-V1, puedes elegir cualquier par de pines adecuados del ESP32 que soporten I2C. Comúnmente, D21 para SDA y D22 para SCL son utilizados en el ESP32, pero puedes configurarlos según tus necesidades en el código.

conecto el 1 a una señal analogica del microcontrolador y el 2?

marcos080589

@copilot conecto el 1 a una señal analogica del microcontrolador y el 2?

copilot

Para conectar el sensor

\text{MQ-135}

al microcontrolador

\text{ESP32-DEVKIT-V1}

, puedes seguir estos pasos:

Señal Analógica:
- Conecta $U2:A1$ o $U2:A2$ (esas son salidas de señal) a uno de los pines de entrada analógica del ESP32. Por ejemplo, puedes usar $U1:VP$ (pin 17) o $U1:VN$ (pin 18).
Tensión de Calefacción (Heater Voltage):
- Conecta $U2:VH+$ a una fuente de alimentación adecuada. Normalmente, esta debería ser de 5V.
- Conecta $U2:VH-$ a GND para cerrar el circuito de calentamiento.
Alimentación del Sensor:
- Asegúrate de alimentar el sensor correctamente. Los pines $U2:B1$ y $U2:B2$ son generalmente para la resistencia variable interna al sensor, puedes dejarlos sin conectar o utilizarlos dependiendo del tipo de medición que desees.

Con respecto a la conexión del pin 2 (

U2:VH+

), es crucial conectarlo a la fuente de alimentación adecuada como se mencionó antes. Déjame saber si necesitas más detalles o tienes alguna otra pregunta.

please explain what U2 does.

marcos080589

@copilot please explain what U2 does.

copilot

The component

U2

(MQ-135) is a gas sensor manufactured by HANWEI ELECTRONICS. It's commonly used for detecting air quality, with a particular strength in sensing certain gases such as ammonia ($NH_3$), sulfur ($SO_2$), benzene ($C_6H_6$), and several others. It's often employed in applications focused on pollution monitoring, air quality management, and safety systems.

Key Features:

Sensing Range: Typically sensitive to several gas concentrations in the ppm range.
Operation Voltage: The heating element needs approximately 5V.
Output: Typically an analog resistance which varies according to the gas concentration.

Pins Description:

Pin 1 (B1) & Pin 3 (B2): Outputs where the resistance between them changes in response to gas concentrations.
Pin 2 (VH+): Positive end of the heater; should be connected to a voltage supply.
Pin 4 (A2) & Pin 6 (A1): Additional connections, possibly for integrating with other circuits.
Pin 5 (VH-): Ground for the heater.

If you're planning to integrate this sensor into your project, we would typically connect these pins to process the analog signal with a microcontroller to interpret the gas concentration data. Let me know if you need help with how to connect this to the

ESP32-DEVKIT-V1

(U1).

cual es una entrada analogica?

marcos080589

@copilot cual es una entrada analogica?

copilot

Una entrada analógica es un tipo de entrada en un sistema electrónico que puede recibir y manejar señales que varían de manera continua en el tiempo, como voltajes que representan valores físicos como temperatura, luz, sonido, etc. Estas señales no están limitadas a valores discretos como sucede con las señales digitales.

En el contexto de microcontroladores y dispositivos como el

\text{ESP32-DEVKIT-V1}

, una entrada analógica se refiere típicamente a un pin que puede leer niveles de voltaje variables, usándose a menudo para interfazar con sensores que generan una salida de voltaje continua.

En el

\text{ESP32-DEVKIT-V1}

, los pines conocidos como VP y VN generalmente se utilizan para entradas analógicas (ADC - Convertidor Analógico a Digital). Estos pines permiten convertir el voltaje analógico de entrada en un valor digital que puede ser procesado por el microcontrolador para tomar decisiones en el software.

¿Necesitas información sobre un tipo particular de entrada analógica o algún ejemplo específico de su uso?

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Overlapping Copper

Reports copper elements that are shorting.

Invalid Layer

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Component Overrides • 2

	Designator	Ruleset
	U2:A1	Override rule for A1
	U2:A2	Override rule for A2

Airwires • 7

	Designators	Net
	U1:GND, U1:GND_1	GND
	U2:B1, U1:VN	Net 1
	U2:B2, U1:VP	Net 2
	U1:D21, OLED1:SDA	Net 3
	U1:D22, OLED1:SCL	Net 4
	U1:3V3, OLED1:5V	Net 5
	U2:VH+, U1:VIN	Net 91

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Manufacturing

Manufacturer Part Number • 1

	Designator	MPN
	OLED1	None

Parts Available

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	Designator	Stock	...
	OLED1	None
	U1	None
	U2	None
	U3	3k

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Ground
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jharwinbarrozo
20.5M
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Generic Resistor
A generic fixed resistor for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0Ω 10Ω 100Ω 1.0kΩ 10kΩ 100kΩ 1.0MΩ 1.1Ω 11Ω 110Ω 1.1kΩ 11kΩ 110kΩ 1.1MΩ 1.2Ω 12Ω 120Ω 1.2kΩ 12kΩ 120kΩ 1.2MΩ 1.3Ω 13Ω 130Ω 1.3kΩ 13kΩ 130kΩ 1.3MΩ 1.5Ω 15Ω 150Ω 1.5kΩ 15kΩ 150kΩ 1.5MΩ 1.6Ω 16Ω 160Ω 1.6kΩ 16kΩ 160kΩ 1.6MΩ 1.8Ω 18Ω 180Ω 1.8KΩ 18kΩ 180kΩ 1.8MΩ 2.0Ω 20Ω 200Ω 2.0kΩ 20kΩ 200kΩ 2.0MΩ 2.2Ω 22Ω 220Ω 2.2kΩ 22kΩ 220kΩ 2.2MΩ 2.4Ω 24Ω 240Ω 2.4kΩ 24kΩ 240kΩ 2.4MΩ 2.7Ω 27Ω 270Ω 2.7kΩ 27kΩ 270kΩ 2.7MΩ 3.0Ω 30Ω 300Ω 3.0KΩ 30KΩ 300KΩ 3.0MΩ 3.3Ω 33Ω 330Ω 3.3kΩ 33kΩ 330kΩ 3.3MΩ 3.6Ω 36Ω 360Ω 3.6kΩ 36kΩ 360kΩ 3.6MΩ 3.9Ω 39Ω 390Ω 3.9kΩ 39kΩ 390kΩ 3.9MΩ 4.3Ω 43Ω 430Ω 4.3kΩ 43KΩ 430KΩ 4.3MΩ 4.7Ω 47Ω 470Ω 4.7kΩ 47kΩ 470kΩ 4.7MΩ 5.1Ω 51Ω 510Ω 5.1kΩ 51kΩ 510kΩ 5.1MΩ 5.6Ω 56Ω 560Ω 5.6kΩ 56kΩ 560kΩ 5.6MΩ 6.2Ω 62Ω 620Ω 6.2kΩ 62KΩ 620KΩ 6.2MΩ 6.8Ω 68Ω 680Ω 6.8kΩ 68kΩ 680kΩ 6.8MΩ 7.5Ω 75Ω 750Ω 7.5kΩ 75kΩ 750kΩ 7.5MΩ 8.2Ω 82Ω 820Ω 8.2kΩ 82kΩ 820kΩ 8.2MΩ 9.1Ω 91Ω 910Ω 9.1kΩ 91kΩ 910kΩ 9.1MΩ #generics #CommonPartsLibrary
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1.5M
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A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF 10pF 100pF 1000pF 0.01uF 0.1uF 1.0uF 10uF 100uF 1000uF 10,000uF 1.1pF 11pF 110pF 1100pF 1.2pF 12pF 120pF 1200pF 1.3pF 13pF 130pF 1300pF 1.5pF 15pF 150pF 1500pF 0.015uF 0.15uF 1.5uF 15uF 150uF 1500uF 1.6pF 16pF 160pF 1600pF 1.8pF 18pF 180pF 1800pF 2.0pF 20pF 200pF 2000pF 2.2pF 22pF 20pF 2200pF 0.022uF 0.22uF 2.2uF 22uF 220uF 2200uF 2.4pF 24pF 240pF 2400pF 2.7pF 27pF 270pF 2700pF 3.0pF 30pF 300pF 3000pF 3.3pF 33pF 330pF 3300pF 0.033uF 0.33uF 3.3uF 33uF 330uF 3300uF 3.6pF 36pF 360pF 3600pF 3.9pF 39pF 390pF 3900pF 4.3pF 43pF 430pF 4300pF 4.7pF 47pF 470pF 4700pF 0.047uF 0.47uF 4.7uF 47uF 470uF 4700uF 5.1pF 51pF 510pF 5100pF 5.6pF 56pF 560pF 5600pF 6.2pF 62pF 620pF 6200pF 6.8pF 68pF 680pF 6800pF 0.068uF 0.68uF 6.8uF 68uF 680uF 6800uF 7.5pF 75pF 750pF 7500pF 8.2pF 82pF 820pF 8200pF 9.1pF 91pF 910pF 9100pF #generics #CommonPartsLibrary
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1.5M
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15.1k
Terminal
An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
natarius
RMCF0805JT47K0
47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
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1.2M
875105359001
10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
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1.2M
CTL1206FYW1T
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1.1M

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ESP32-WROOM-32E Reference Design

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Properties

License

https://creativecommons.org/licenses/by/4.0/

Availability & Pricing

Distributor		Qty 1
	Digi-Key	$2.77
	LCSC	$1.17

Assets

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ESP32-WROOM-32E Reference Design-removebg-preview.png

id=ESP32-WROOM-32E Reference Design-removebg-preview

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