Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes various sensors, a buzzer, an OLED display, and an ESP32 microcontroller. The circuit is designed to monitor environmental conditions such as soil moisture, rain, and temperature/humidity, and to display this information on an OLED screen. Additionally, a buzzer is included for audible alerts.

Component List

1. SparkFun Soil Moisture Sensor

   • Pins: VCC, GND, SIG
   • Description: Measures the moisture level in the soil.
   • Purpose: To monitor soil moisture levels.

2. RAIN SENSOR

   • Pins: AO, DO, GRD, VCC
   • Description: Detects the presence of rain.
   • Purpose: To monitor rain conditions.

3. Buzzer

   • Pins: PIN, GND
   • Description: Emits sound when activated.
   • Purpose: To provide audible alerts.

4. 0.96" OLED

   • Pins: GND, VDD, SCK, SDA
   • Description: Displays information on a small screen.
   • Purpose: To display sensor data.

5. ESP32

   • Pins: EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, GND, VIN, 3V3, D15, D2, D4, RX2, TX2, D5, D18, D19, D21, RX0, TX0, D22, D23, BOOT
   • Description: A powerful microcontroller with Wi-Fi and Bluetooth capabilities.
   • Purpose: To control the sensors, process data, and display information.

6. DHT 11

   • Pins: VCC, GND, DATA
   • Description: Measures temperature and humidity.
   • Purpose: To monitor environmental temperature and humidity.

Wiring Details

SparkFun Soil Moisture Sensor

• VCC connected to ESP32 3V3
• GND connected to ESP32 GND
• SIG connected to ESP32 D19

RAIN SENSOR

• VCC connected to ESP32 3V3
• GRD connected to ESP32 GND
• AO connected to ESP32 D18

Buzzer

• PIN connected to ESP32 D2
• GND connected to ESP32 GND

0.96" OLED

• VDD connected to ESP32 3V3
• GND connected to ESP32 GND
• SCK connected to ESP32 D22
• SDA connected to ESP32 D21

ESP32

• 3V3 connected to VCC of SparkFun Soil Moisture Sensor, RAIN SENSOR, DHT 11, and 0.96" OLED
• GND connected to GND of SparkFun Soil Moisture Sensor, RAIN SENSOR, DHT 11, 0.96" OLED, and Buzzer
• D2 connected to PIN of Buzzer
• D4 connected to DATA of DHT 11
• D18 connected to AO of RAIN SENSOR
• D19 connected to SIG of SparkFun Soil Moisture Sensor
• D21 connected to SDA of 0.96" OLED
• D22 connected to SCK of 0.96" OLED

DHT 11

• VCC connected to ESP32 3V3
• GND connected to ESP32 GND
• DATA connected to ESP32 D4

Code

No code is provided for this circuit.

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This document provides a comprehensive overview of the circuit, including a summary, detailed component list, wiring details, and a section for code documentation. The wiring details ensure that each component is correctly connected to the ESP32 microcontroller, facilitating proper operation of the circuit.