Tag Archives: Pinout

ESP32 DevKit ESP32-WROOM GPIO Pinout


ESP32-WROOM-32 is a powerful, generic Wi-Fi+BT+BLE MCU module that targets a wide variety of applications, ranging from low-power sensor networks to the most demanding tasks, such as voice encoding, music streaming and MP3 decoding.

ESP32 LED Blink Example
At the core of this module is the ESP32-D0WDQ6 chip*. The chip embedded is designed to be scalable and adaptive. There are two CPU cores that can be individually controlled, and the CPU clock frequency is adjustable from 80 MHz to 240 MHz. The user may also power off the CPU and make use of the low-power co-processor to constantly monitor the peripherals for changes or crossing of thresholds. ESP32 integrates a rich set of peripherals, ranging from capacitive touch sensors, Hall sensors, SD card interface, Ethernet, high-speed SPI, UART, I2S and I2C.

For more details Read ESP32-WROOM32 Data sheet

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ESP8266 arduino digital IO

In this tutorial we focus only on GPIO pins of ESP8266 and How to use efficiently ?

ESP8266 comes in many variants most popular is ESP-12 and ESP-01. Use of ESP8266 as just a Serial-to-WiFi bridge with arduino is most common mistake newbies do. ESP8266 itself is very powerful microcontroller. Lets compare with Arduino with ESP8266. To get serial and IOs expantion like Arduino you can use NodeMCU. Difference between ESP12, ESP01 and NodeMCU is only of Flash memory and Number of IOs are available to user. Programming and functioning of all three devices is same.
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Nodemcu pinout

Nodemcu pinout is having labels D0 to D8 and RX-TX but when programming it using Arduino IDE we observe that its labels are not matching with IO connections. Lets see actual connections of NodeMCU with ESP8266 i.e. ESP-12.

NodeMCU is an open source IoT platform. It includes firmware which runs on the ESP8266 Wi-Fi SoC from Espressif Systems, and hardware which is based on the ESP-12 module. The term “NodeMCU” by default refers to the firmware rather than the dev kits. Continue reading Nodemcu pinout