Gopalganj Hub
ARDUINO & NODEMCU FIRMWARE HUB

Build, Flash &
Drive Your Project.

Real Arduino and NodeMCU project source code (.ino), step-by-step pinout wiring maps, and complete component checklists. 100% free to copy and test on your workbench.

10 Verified Project Firmware Sketches ⌘
Showing 10 ready-to-flash project firmware sketches✓ Free Copy & Flash · Tested in Gopalganj
Bluetooth Smartphone Controlled 4WD Robot CarArduino UNOMOST POPULAR
Beginner⏱ 45 mins

Bluetooth Smartphone Controlled 4WD Robot Car

Drive a 4-wheel robot car wirelessly from any Android smartphone via HC-05 Bluetooth.

✓ Complete .ino Code✓ Pinout Wiring Map✓ Full BOM Checklist
ESP8266 NodeMCU Wi-Fi Robot Car (Web App)ESP8266 NodeMCUHOT PROJECT
Intermediate⏱ 60 mins

ESP8266 NodeMCU Wi-Fi Robot Car (Web App)

Host a responsive virtual joystick webpage right on the ESP8266 to drive over local Wi-Fi.

✓ Complete .ino Code✓ Pinout Wiring Map✓ Full BOM Checklist
Ultrasonic Obstacle Avoidance Radar RoverArduino UNOAUTONOMOUS
Intermediate⏱ 50 mins

Ultrasonic Obstacle Avoidance Radar Rover

Autonomous intelligent robot that looks around using an ultrasonic servo turret and navigates obstacles.

✓ Complete .ino Code✓ Pinout Wiring Map✓ Full BOM Checklist
TCRT5000 Dual-Sensor Black Line Follower BotArduino UNOEXHIBITION WINNER
Beginner⏱ 30 mins

TCRT5000 Dual-Sensor Black Line Follower Bot

High-precision line-tracking algorithm for science exhibition and robotics race competitions.

✓ Complete .ino Code✓ Pinout Wiring Map✓ Full BOM Checklist
Touchless Automatic Smart DustbinArduino NanoHYGIENE STEM
Beginner⏱ 25 mins

Touchless Automatic Smart Dustbin

Hygienic touch-free dustbin that automatically flips the lid open when your hand approaches.

✓ Complete .ino Code✓ Pinout Wiring Map✓ Full BOM Checklist
NodeMCU ESP8266 IoT Live Weather StationESP8266 NodeMCUIOT CLOUD
Intermediate⏱ 40 mins

NodeMCU ESP8266 IoT Live Weather Station

Live temperature, humidity, and heat-index monitor with high-contrast OLED display & web telemetry.

✓ Complete .ino Code✓ Pinout Wiring Map✓ Full BOM Checklist
Automated Soil Moisture Plant Irrigation SystemArduino UNOAGRITECH
Beginner⏱ 35 mins

Automated Soil Moisture Plant Irrigation System

Water plants automatically using soil capacitive probe, 5V relay module and mini submersible pump.

✓ Complete .ino Code✓ Pinout Wiring Map✓ Full BOM Checklist
MQ-2 Gas Leakage & Flame Security AlarmArduino UNOSAFETY SYSTEM
Beginner⏱ 25 mins

MQ-2 Gas Leakage & Flame Security Alarm

Industrial safety detector alerting against LPG, smoke, and combustible gas leakages with audio alarm.

✓ Complete .ino Code✓ Pinout Wiring Map✓ Full BOM Checklist
Dual-Axis Smart Solar Sun TrackerArduino UNOCLEANTECH
Advanced⏱ 75 mins

Dual-Axis Smart Solar Sun Tracker

Maximizes solar panel output efficiency by tracking the sun's trajectory across both axes with 4 LDRs.

✓ Complete .ino Code✓ Pinout Wiring Map✓ Full BOM Checklist
Smart RFID Contactless Security Door Access SystemArduino UNOSECURITY
Intermediate⏱ 45 mins

Smart RFID Contactless Security Door Access System

Contactless tap-and-go electronic door lock with RC522 RFID reader and servo latch mechanism.

✓ Complete .ino Code✓ Pinout Wiring Map✓ Full BOM Checklist
DOCUMENTATION PACKS

Project Reports & Schematics

Formatted academic reports, PCB layout files, and circuit diagrams for submission in school or college.

Wiring Diagram
-34%
Wiring & diagramsGopalganj Hub
Wiring Diagram
★★★★★4.9(60)

High-resolution full-color connection diagram showing exact pin-to-pin jumpers.

₹79₹120
Circuit Diagram
-34%
Wiring & diagramsGopalganj Hub
Circuit Diagram
★★★★★4.7(18)

Schematic electrical diagram with standardized electronic symbols and part values.

₹99₹149
PCB Diagram
VERIFIED
Wiring & diagramsGopalganj Hub
PCB Diagram
★★★★★4.9(51)

Printed circuit board layout and Gerber files for custom fabrication.

Quote on request
Pin Configuration Diagram
VERIFIED
Wiring & diagramsGopalganj Hub
Pin Configuration Diagram
★★★★★4.8(48)

Clear pinout reference chart for microcontrollers, sensors and motor drivers.

Quote on request