Circuit Documentation

Summary

This document provides a detailed overview of a solar-powered circuit designed to control a DC motor and communicate via GPS and GSM modules. The circuit includes a solar charge controller, a DC motor driver, a relay module, an ESP32 microcontroller, a SIM900A GSM module, a GPS NEO 6M module, a 18650 Li-Ion battery, and a solar panel. The ESP32 microcontroller is the central control unit, interfacing with the motor driver, relay, GPS, and GSM modules.

Component List

CN3065 Solar Charge

• Description: Solar charge controller for charging Li-Ion batteries.
• Pins: SOLAR +, SOLAR -, BAT +, SYS -, SYS +, BAT -

L298N DC Motor Driver

• Description: Dual H-Bridge motor driver for controlling DC motors.
• Pins: OUT1, OUT2, 12V, GND, 5V, OUT3, OUT4, 5V-ENA-JMP-I, 5V-ENA-JMP-O, +5V-J1, +5V-J2, ENA, IN1, IN2, IN3, IN4, ENB

DC Motor

• Description: Standard DC motor.
• Pins: pin 1, pin 2

1 Channel 5V Relay Module

• Description: Single-channel relay module for switching high-power devices.
• Pins: VCC+, VCC- (GND), IN, N.O., COM, N.C.

ESP32 (30 pin)

• Description: Wi-Fi and Bluetooth-enabled microcontroller.
• Pins: EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, GND, Vin, D23, D22, TX0, RX0, D21, D19, D18, D5, TX2, RX2, D4, D2, D15, 3V3

SIM900A

• Description: GSM/GPRS module for cellular communication.
• Pins: GND, DB9-3 (RXD), DB9-2 (TXD), 5V, 3VR, 5VR, 3VT, 5VT, VCC, Ring, RESTART, RESET, STATUS

GPS NEO 6M

• Description: GPS module for location tracking.
• Pins: VCC, RX, TX, GND

18650 Li-Ion

• Description: Rechargeable lithium-ion battery.
• Pins: Positive, Negative

Solar Panel

• Description: Solar panel for generating electrical power.
• Pins: +, -

Wiring Details

CN3065 Solar Charge

• SOLAR + connected to Solar Panel +
• SOLAR - connected to Solar Panel -
• BAT + connected to 18650 Li-Ion Positive
• BAT - connected to 18650 Li-Ion Negative
• SYS + not connected
• SYS - not connected

L298N DC Motor Driver

• 5V connected to 18650 Li-Ion Positive
• GND connected to 18650 Li-Ion Negative
• IN1 connected to ESP32 D23
• IN2 connected to ESP32 D22
• OUT1 connected to DC Motor pin 1
• OUT2 connected to DC Motor pin 2
• 12V connected to 1 Channel 5V Relay Module COM
• Other pins not connected

DC Motor

• pin 1 connected to L298N DC Motor Driver OUT1
• pin 2 connected to L298N DC Motor Driver OUT2

1 Channel 5V Relay Module

• VCC+ not connected
• VCC- (GND) not connected
• IN connected to ESP32 D13
• N.O. connected to 18650 Li-Ion Positive
• COM connected to L298N DC Motor Driver 12V
• N.C. not connected

ESP32 (30 pin)

• Vin connected to 18650 Li-Ion Positive
• GND connected to 18650 Li-Ion Negative
• D13 connected to 1 Channel 5V Relay Module IN
• D23 connected to L298N DC Motor Driver IN1
• D22 connected to L298N DC Motor Driver IN2
• TX0 connected to GPS NEO 6M RX
• RX0 connected to GPS NEO 6M TX
• TX2 connected to SIM900A DB9-3 (RXD)
• RX2 connected to SIM900A DB9-2 (TXD)
• Other pins not connected

SIM900A

• VCC connected to 18650 Li-Ion Positive
• GND connected to 18650 Li-Ion Negative
• DB9-3 (RXD) connected to ESP32 TX2
• DB9-2 (TXD) connected to ESP32 RX2
• Other pins not connected

GPS NEO 6M

• VCC connected to 18650 Li-Ion Positive
• GND connected to 18650 Li-Ion Negative
• RX connected to ESP32 TX0
• TX connected to ESP32 RX0

18650 Li-Ion

• Positive connected to CN3065 Solar Charge BAT +, ESP32 Vin, 1 Channel 5V Relay Module N.O., L298N DC Motor Driver 5V, SIM900A VCC, GPS NEO 6M VCC
• Negative connected to CN3065 Solar Charge BAT -, ESP32 GND, L298N DC Motor Driver GND, SIM900A GND, GPS NEO 6M GND

Solar Panel

• + connected to CN3065 Solar Charge SOLAR +
• - connected to CN3065 Solar Charge SOLAR -

Code

No code provided for this circuit.

---

This document provides a comprehensive overview of the circuit, including a summary, detailed component list, wiring details, and code documentation. This should serve as a useful reference for understanding and replicating the circuit.