Wiring & Requirment

Component	Quantity	Notes
ESP32-WROOM	1	Main microcontroller with Wi-Fi & Bluetooth onboard
AMS1117 3.3V Regulator	1	Converts 5V (e.g. from USB) to 3.3V for the ESP32 and other modules
ST7735 1.8" TFT LCD	1	SPI-based display module, used as the main UI screen
MSKT-13C01 Switch	1	Optional 3-way slide switch (useful for boot/program/reset selection)
W25Q EEPROM (e.g. W25Q64)	1	Optional external SPI EEPROM for future data storage expansion
Buzzer (active type)	1	Optional — gives audio feedback on events like boot or success
100nF Capacitor	2	For decoupling / noise reduction on power lines
10µF Capacitor	2	Input/output filtering for AMS1117 voltage regulator
Tactile Push Button	3	Used for user input (e.g., mode select, next photo, reset)
USB Type-C Connector	1	Optional — supplies regulated 5V input power to the whole system
2-Pin Header	2	For UART TX/RX connection — useful for debugging via serial monitor

Microcontroller: ESP32, you can use other ESP32 variants (like ESP32-S3, ESP32-C3, etc.), but you might need to make some adjustments
Power Supply: 5V regulated input via USB or external adapter
Display Compatibility: ST7735 must support SPI at 3.3V logic
MicroSD or SPI Flash: Must be formatted as FAT32
Relay Rating: Make sure relay can handle your heating element’s current (e.g. 5A/250VAC)

SCHEMATIC