Embedded Hardware Projects

A collection of Arduino and ESP32 sketches for touch sensors, OLEDs, motors, cameras and browser controls. Each folder is a separate experiment; there is no single application to upload or shared dependency lockfile.

flowchart LR
    Input[Touch / sensor / phone / browser] --> Sketch[Choose one sketch]
    Sketch --> Output[LED / OLED / motor / servo / camera stream]

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Sketch index

The descriptions below follow the committed source. Board wiring, library compatibility and physical behavior still need checking for your own build.

Sketch	Exercise	Main requirements / notes
Touch sensor interface	Digital touch input and LED feedback	Built-in Arduino APIs; touch D2, LED D13
GALIJ_OLED	OLED animation and touch interaction	Wire, Adafruit GFX / SSD1306
OLED_TOUCH	Touch-selected OLED animation	Wire, Adafruit GFX / SSD1306
SdCard_demo	SD text-file read/write exercise	SD, SPI; source credits educ8s.tv
Meme_voice_playback	Sensor-triggered ISD1820 playback	Flame input D11, playback trigger D12
L298N_MODULE_CAR_TEST	L298N motor direction / speed test	Check enable and motor pin definitions
2DC_L293D	Two-motor L293D direction test	D2–D5 motor control
4DC_L293D	Four-motor direction test	D2–D9 motor control
BT_CAR	HC-05 Bluetooth car commands	SoftwareSerial; includes a commented diagonal-control variant
AIOR_APK_TEST	App byte-command and motor test	SoftwareSerial; 9600 baud
drone_motor_test	Potentiometer-to-ESC throttle exercise	Servo library; A0 potentiometer, D6 signal
ESP32_OLED_TOUCH	ESP32 touch-triggered OLED animation	Wire, Adafruit GFX / SSD1306
SERVO_WEB	Single-servo web control	WiFi, ESP32Servo; signal GPIO13
Pan_tilt_control	Two-servo web control	WiFi, ESP32Servo; GPIO13 / GPIO12
CameraWebServer	Camera web-server example	Keep companion .cpp/.h files; check selected camera model
Rhyx-m21-cam	RHYX M21 camera streaming	esp_camera, WiFi, WebServer; companion camera_pins.h
ESP32CAM_CAR	Camera car with browser controls	AsyncTCP / ESPAsyncWebServer; schematic included
Pan_Tilt_Camera	Camera stream plus pan/tilt experiment	AsyncTCP, ESPAsyncWebServer, ESP32Servo; integration caveat below

The face-detection folder contains separate Python camera/Arduino experiments. Its README lists cvzone and pyfirmata; it is not an Arduino sketch.

Try one experiment

1. Clone this repository and open one .ino in Arduino IDE. Keep that sketch's companion headers/source files with it. If the IDE asks to create a matching sketch folder, keep the companion files together there too.
2. Select the actual board and port. For ESP32, install the matching board support and check the camera model, GPIO map and partition settings in the chosen folder.
3. Install only the libraries imported by that sketch. OLED examples use Adafruit GFX and SSD1306 with I²C address 0x3C; camera and async-network examples have additional dependencies listed above. Their API versions are not pinned.
4. Compare every pin definition with your wiring. Configure your own Wi-Fi details locally for network examples; do not commit real credentials. Station-mode examples join a router, while AP examples create their own network.
5. Compile first, then upload and use the sketch's configured serial baud rate for diagnostics. Start with Touch sensor interface if you want the smallest wiring exercise.

Current limitations

• The sketches are learning snapshots, not a set of newly validated hardware builds. An included ZIP of a library is not a versioned compatibility guarantee.
• Pan_Tilt_Camera currently starts synchronous and asynchronous servers on port 80. Resolve that shared-port conflict and its client URLs before treating the combined stream/control experiment as working.
• Motor and ESC tests can actuate hardware immediately. Disconnect propellers for ESC checks, lift car wheels for motor checks, use a suitable external actuator supply and share grounds. GPIO pins are control signals, not motor power supplies.
• The SD demo creates/writes files; use a card whose contents you can replace. Sensor polarity and servo travel limits depend on the actual modules.

For the separate combined robot build, see All-in-One Arduino Robot, which includes its app source, schematic and command table.

License and credits

See LICENSE for the repository's MIT license. Retain upstream notices in copied examples, including the SD tutorial attribution and Espressif camera-source headers. Authorship of every upstream example is not implied by this collection.