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Pinouts. Tutorials. Answers.

Reference guides for the ESP32 chip family: real GPIO tables, real dimensions, and a working Hello World for each one.

ESP32-C3 AI-C3 Pinout A purple-PCB ESP32-C3-MINI-1 dev board with USB-C and an onboard RGB LED. Read guide Arduino Arduino Nano Pinout The classic ATmega328P board: 14 digital pins, 8 analog inputs. Read guide ATtiny ATtiny 0/1/2-Series Pinout Microchip’s modern ATtiny family: real USART/SPI/I2C and single-wire UPDI programming. Read guide ATtiny ATtiny85 Pinout An 8-pin AVR chip with 6 GPIOs, programmed over ISP. Read guide Stepper driver DRV8825 Pinout A 16-pin stepper motor driver with up to 1/32 microstepping. Read guide ESP32-C2 ESP32-C2 (ESPC2-02) Pinout Espressif’s smallest, lowest-cost Wi-Fi and Bluetooth chip. Read guide ESP32-C3 ESP32-C3-MINI-1 Pinout A single RISC-V core with the flash built in, no external flash pins to avoid. Read guide ESP32-C5 ESP32-C5 Pinout Espressif’s first RISC-V chip with dual-band Wi-Fi 6, 2.4 and 5 GHz. Read guide
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ESP32-C6 ESP32-C6-WROOM-1 Pinout Wi-Fi 6, Bluetooth LE and 802.15.4 (Thread and Zigbee) on one chip. Read guide ESP32-C61 ESP32-C61 Pinout A newer, budget Wi-Fi 6 chip, no Thread or Zigbee despite the similar name to the C6. Read guide ESP32-S2 ESP32-S2 Mini Pinout Native USB, 14 touch pins, and no Bluetooth at all. Read guide ESP32 ESP32-WROOM-32D Pinout The classic dual-core module: Wi-Fi, Bluetooth, 34 GPIOs. Read guide ESP8266 ESP8266 Pinout On NodeMCU and Wemos D1 Mini boards: 9 usable GPIOs, no Bluetooth. Read guide
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ESP8266 ESP8266-01 Pinout An 8-pin breakout with just 2 usable GPIOs and no onboard USB. Read guide ESP32-C2 ESP8685-WROOM-03 Pinout Espressif’s enhanced ESP32-C2-family chip in an 11-pin package. Read guide Bluetooth HC-05 Bluetooth Module Pinout A UART-to-Bluetooth bridge, as a bare 34-pin module or a 6-pin breakout. Read guide Single-board computer Raspberry Pi 4 Pinout The full 40-pin GPIO header: 26 general-purpose pins, I2C, SPI, UART. Read guide