Telegram bot enables ESP32-CAM to take and send photos via messaging. Project compatible with OV2640 camera boards using Arduino IDE. Users can request photos from anywhere with internet access
UART enables serial communication between devices using two wires. Data transfers bit by bit between devices at different frequencies. Communication can be simplex, full-duplex, or half-duplex
OTA updates allow firmware uploads via Wi-Fi instead of serial port. Updates can be performed through Arduino IDE, web browser, or HTTP server. First upload must be done via serial port, subsequent updates can be wireless
2.8" 320x240 touch display from Aliexpress costs approximately 8€. Works with ESP32 DevKitC V4 and Arduino IDE 2.0.4. Achieves speeds of 32fps at 40MHz and 63fps at 80MHz. Maximum speed reaches 105fps with DMA at 40MHz
DS18B20 temperature sensor has three pins: GND, VCC, and DATA. Sensor comes in TO-92 package and waterproof probe forms. DIYables brand recommended for reliable performance
Push button contains four terminals (1-4) with internal connections. ESP32 uses internal pull-up configuration for button connection. LED connected via GND and D26 with resistor protection