L’ESP8266 D1 Mini V4 è una scheda di sviluppo compatta per microcontrollore con WiFi, basata sulla famiglia ESP8266, spesso usata con strumenti in stile Arduino. Si collega a un PC tramite USB per la programmazione e la comunicazione seriale, e offre pin GPIO (logica a 3,3 V) per controllare periferiche. Di solito si usa per integrare sensori con WiFi in progetti IoT.
| Pin | Segnale | Descrizione |
|---|---|---|
TX |
TX | UART transmit from ESP8266 for programming and serial output at 3.3V logic. |
RX |
RX | UART receive into ESP8266 for programming and serial input at 3.3V logic. |
GPIO5/SCL |
SCL | ESP8266 GPIO5, commonly D1; default I2C clock line SCL at 3.3V logic. |
GPIO4/SDA |
SDA | ESP8266 GPIO4, commonly D2; default I2C data line SDA at 3.3V logic. |
GPIO0 |
digital | ESP8266 GPIO0, commonly D3; boot-mode pin, low during reset enters flash programming. |
GPIO2 |
digital | ESP8266 GPIO2, commonly D4; boot strap pin and often onboard LED signal. |
GND |
ground | Ground reference for power and 3.3V logic signals. |
VBUS |
power | USB 5V bus supply input/output from the USB connector. |
RST |
reset | Active-low reset input for restarting the ESP8266 module. |
A0 |
analog | Analog input to the onboard ADC; measures a single analog voltage input. |
GPIO16 |
digital | ESP8266 GPIO16, commonly D0; digital I/O and deep-sleep wake connection. |
GPIO14/SCK |
SCK | ESP8266 GPIO14, commonly D5; SPI clock SCK at 3.3V logic. |
GPIO12/MISO |
MISO | ESP8266 GPIO12, commonly D6; SPI MISO data input at 3.3V logic. |
GPIO13/MOSI |
MOSI | ESP8266 GPIO13, commonly D7; SPI MOSI data output at 3.3V logic. |
GPIO15/SS |
SS | ESP8266 GPIO15, commonly D8; SPI slave-select/chip-select and boot strap pin. |
3V3 |
power | Regulated 3.3V supply rail for the ESP8266 and low-current peripherals. |
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