Circuit Documentation

Summary

This circuit is designed to monitor soil moisture levels using an ESP-8266 microcontroller, which reads data from a soil moisture sensor and displays the information on an OLED display. The system also includes a DHT11 sensor for measuring temperature and humidity, a TP4056 module for charging a Li-ion battery, and an MT3608 boost converter to step up the voltage when necessary. A toggle switch is used to control the power supply to the circuit.

Component List

ESP-8266 Controller

• Microcontroller with WiFi capability.
• Used for reading sensor data and controlling the OLED display.

YL-69 Sonda

• Soil moisture probe.
• Measures the moisture level in the soil.

Soil Moisture Module

• Interface module for the YL-69 Sonda probe.
• Provides analog and digital outputs corresponding to the soil moisture level.

0.96" OLED

• Small display screen.
• Shows the sensor data and other information.

DHT11 Sensor V2

• Temperature and humidity sensor.
• Provides environmental data to the microcontroller.

TP4056

• Lithium-ion battery charging module.
• Charges the battery and provides power to the circuit.

MT3608

• Boost converter module.
• Steps up the voltage to the required level for the ESP-8266.

18650 Li-ion Battery

• Rechargeable battery.
• Powers the circuit.

Toggle Switch

• Mechanical switch.
• Controls the power supply to the circuit.

Wiring Details

ESP-8266 Controller

• A0 connected to Soil Moisture Module Analog
• D1 connected to OLED SCK
• D2 connected to OLED SDA
• D4 connected to DHT11 Sensor V2 DAT
• 3V3 connected to OLED VDD, Soil Moisture Module VCC, and DHT11 Sensor V2 VCC
• GND connected to OLED GND, Soil Moisture Module Ground, DHT11 Sensor V2 GND, and MT3608 VOUT-
• Vin connected to MT3608 VOUT+

YL-69 Sonda

• + connected to Soil Moisture Module positive
• - connected to Soil Moisture Module negative

Soil Moisture Module

• VCC and Ground connected as described above.
• Analog connected to ESP-8266 A0

0.96" OLED

• SCK connected to ESP-8266 D1
• SDA connected to ESP-8266 D2
• VDD connected to ESP-8266 3V3
• GND connected to ESP-8266 GND

DHT11 Sensor V2

• DAT connected to ESP-8266 D4
• VCC connected to ESP-8266 3V3
• GND connected to ESP-8266 GND

TP4056

• OUT- connected to Toggle Switch COM
• B- connected to 18650 Li-ion Battery -
• B+ connected to 18650 Li-ion Battery +
• OUT+ connected to MT3608 VIN+

MT3608

• VOUT+ connected to ESP-8266 Vin
• VOUT- connected to ESP-8266 GND
• VIN+ connected to TP4056 OUT+
• VIN- connected to Toggle Switch L1

18650 Li-ion Battery

• + connected to TP4056 B+
• - connected to TP4056 B-

Toggle Switch

• L1 connected to MT3608 VIN-
• COM connected to TP4056 OUT-

Documented Code

No code was provided for the microcontroller. The expected code should handle reading data from the soil moisture sensor and the DHT11 sensor, processing the data, and displaying it on the OLED screen. It should also manage WiFi connectivity if remote monitoring or control is required.

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Please note that the above documentation is based on the provided parts list and electrical net list. The actual functionality and interconnections should be verified with the actual circuit design and requirements.