Circuit Documentation

Summary

This circuit integrates a variety of sensors and modules to interface with a Raspberry Pi Pico microcontroller. The sensors include capacitive soil moisture sensors, a DHT11 temperature and humidity sensor, a temperature sensor, and a rain sensor. The circuit also features a LoRa Ra-02 SX1278 module for long-range communication and an LCD display for user interface. Power management is handled by a solar panel and a charge controller, with an 18650 battery in a holder for energy storage.

Component List

Raspberry Pi Pico

• A microcontroller board based on the RP2040 microcontroller, with a wide range of GPIO pins for interfacing with various sensors and modules.

Capacitive Soil Moisture Sensor V1.2 (x4)

• These sensors measure the moisture level in the soil via capacitive sensing, which is less prone to corrosion.

DHT11 Sensor V2

• A basic, low-cost digital temperature and humidity sensor.

Temperature Sensor

• A sensor for measuring temperature with a digital interface.

LoRa Ra-02 SX1278

• A long-range communication module based on the SX1278 chip, capable of long-distance transmission with low power consumption.

LCD Display 16x4 I2C

• An alphanumeric liquid crystal display with an I2C interface for displaying data.

RAIN SENSOR

• A sensor for detecting rainwater, with both analog and digital outputs.

Solar Panel

• A photovoltaic panel for converting solar energy into electrical power.

Do solara (Solar Charge Controller)

• A device that controls the charging of a battery from a solar panel and protects the battery from overcharging.

18650 in holder

• A rechargeable lithium-ion battery in a holder, commonly used for portable electronics.

Wiring Details

Raspberry Pi Pico

• Serves as the central microcontroller unit, interfacing with all sensors and modules.

Capacitive Soil Moisture Sensor V1.2

• VCC connected to 3.3V power supply.
• GND connected to ground.
• AOUT connected to an analog input pin on the Raspberry Pi Pico.

DHT11 Sensor V2

• VCC connected to 3.3V power supply.
• GND connected to ground.
• DAT connected to a digital input pin on the Raspberry Pi Pico.

Temperature Sensor

• Temp VDD Red connected to 3.3V power supply.
• Temp GND Black connected to ground.
• Temp DQ Data Yellow connected to a digital input pin on the Raspberry Pi Pico.

LoRa Ra-02 SX1278

• 3.3V and GND connected to power supply and ground, respectively.
• SCK, MOSI, MISO, NSS, RST, and DI00 connected to corresponding SPI and control pins on the Raspberry Pi Pico.

LCD Display 16x4 I2C

• VCC connected to 3.3V power supply.
• GND connected to ground.
• SDA and SCL connected to I2C data and clock lines on the Raspberry Pi Pico.

RAIN SENSOR

• VCC connected to 3.3V power supply.
• GRD connected to ground.
• AO connected to an analog input pin on the Raspberry Pi Pico.
• DO connected to a digital input pin on the Raspberry Pi Pico.

Solar Panel

• "+" connected to the positive input of the solar charge controller.
• "-" connected to the negative input of the solar charge controller.

Do solara (Solar Charge Controller)

• "+" and "-" connected to the solar panel.
• "b+" and "b-" connected to the 18650 battery holder.
• "out+" and "out-" provide regulated output to the circuit.

18650 in holder

• VCC connected to the "b+" of the solar charge controller.
• GND connected to the "b-" of the solar charge controller.

Documented Code

sketch.ino

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

documentation.txt

No additional documentation provided for the code.