Integración de Sensores con ESP32

Tengo un poryecto, quiero intregar 3 sensores a mi placa esp32, el primer sensor es un scd30, el segundo es un DS18B20, el tercero es un MQ-3, todo esto mas un pantalla SSD1306 0.96 128x64

125 days

flux

1:33

Weighing design priorities.

Planning sensor integration.

Creating a project plan.

Accessing knowledge base.

Planning a new project.

Voy a integrar SCD30, DS18B20, MQ-3 y SSD1306 en tu placa ESP32: I2C para SCD30+OLED, 1‑Wire para DS18B20, ADC y 5V para el heater del MQ‑3, con pull-ups, desacoples y pines seguros.

Antes de empezar:

Que módulo de ESP32 usas (WROOM/WROVER/C3/S3) y cómo lo alimentarás (USB, batería)?
¿I2C para SCD30 y OLED? ¿Alguna dirección I2C fija a respetar?
¿MQ‑3 desnudo o módulo a 5V con salida analógica? ¿Dispones de 5V en la placa?

Cuando estés listo, haz clic en “Start” en la barra del plan para ejecutarlo.

Plan

#Goal

Integrate an ESP32-based module with three sensors (SCD30, DS18B20, MQ-3) and a 0.96" 128x64 SSD1306 OLED display. The design must establish an I2C bus for the SCD30 and OLED, a 1-Wire bus for the DS18B20, and an ADC input plus a separate 5V supply for the MQ-3 sensor heater, while avoiding ESP32 boot/reserved pins. Support components such as pull-ups, decoupling capacitors, and testpoints will also be added.

#Implementation plan

ESP32 and Power Subsystem
1. Select and add an ESP32 module ensuring that boot and reserved pins (e.g., GPIO0, GPIO2, etc.) are not used for sensor connections.
2. Configure power rails with a stable 3.3V supply for the ESP32 and sensor signal operations, and a 5V rail available with sufficient current (~150–200 mA) for the MQ-3 heater.
3. Add decoupling capacitors (e.g., 100nF and 10uF) close to the ESP32 power pins and other ICs.
4. Include testpoints and programming headers for ESP32.
I2C Bus Integration (SCD30 & SSD1306)
1. Place the SCD30 sensor and SSD1306 OLED display symbols in the schematic.
2. Connect their I2C pins (SDA, SCL) to designated ESP32 GPIOs that are safe (avoiding bootstrap pins).
3. Add pull-up resistors (4.7k ohm) on the I2C lines to 3.3V as required.
DS18B20 Integration (1-Wire Bus)
1. Place the DS18B20 sensor symbol in the schematic.
2. Connect its data line to a chosen ESP32 GPIO (ensuring it is not a boot pin) and add a 4.7k ohm pull-up resistor to 3.3V on the 1-Wire bus.
MQ-3 Sensor and ADC Input
1. Place the MQ-3 sensor symbol and prepare its circuit connection.
2. Connect the analog output of the MQ-3 sensor to an available ADC input on the ESP32 (selecting a pin that avoids boot functions).
3. Connect the sensor heater to the 5V rail ensuring proper current capacity. Add any needed resistors/load/filter components as per sensor guidelines.
Final Checks
1. Verify all sensor and display connections are correctly interfaced with the ESP32 while avoiding reserved pins.
2. Run ERC/DRC checks ensuring component ratings, pull-ups, protection, and decoupling are appropriately configured.
3. Document net connections and supply configurations in the project schematics.

#Success criteria

All sensors (SCD30, DS18B20, MQ-3) and the SSD1306 display are connected with correct bus assignments: I2C for SCD30 and OLED, 1-Wire for DS18B20, and ADC + 5V heater for MQ-3.
ESP32 connections avoid boot/reserved GPIOs and have proper decoupling and testing provisions.
Power supplies are correctly set up with a stable 3.3V for logic and adequate 5V for the MQ-3 heater, meeting current requirements.
Schematic passes ERC/DRC reviews with all pull-ups and support components correctly added.

Aclarar módulo ESP32 y alimentación

Definir buses y direcciones

Especificar tipo de MQ-3

Pedir sugerencia de pines

Solicitar partes de soporte

125 days

SEL

VDD

TX/SCL

PWM

GND

RX/SDA

RDY

Reviews

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