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