MicroMod ESP32 Processor Board Hookup Guide

Contributors: Alex the Giant, Ell C

Arduino Example: Blink

With the SparkFun ESP32 Arduino core installed, you're ready to begin programming. Make sure you have the ESP32 MicroMod board definition selected under your Tools > Board menu.

Then select your serial port under the Tools > Port menu.

You can also select the Upload Speed: "921600" baud -- the fastest selectable rate -- will get the code loaded onto your ESP32 the fastest, but may fail to upload once-in-a-while. (It's still way worth it for the speed increase!)

Loading Blink

To make sure your toolchain and board are properly set up, we'll upload the simplest of sketches -- Blink! The STAT LED on the ESP32 Processor Board is perfect for this test. This is also a good time to test out serial communication. Copy and paste the example sketch below into a fresh Arduino sketch:

language:c
int ledPin = 2;

void setup()
{
    pinMode(ledPin, OUTPUT);
    Serial.begin(115200);
}

void loop()
{
    Serial.println("Hello, world!");
    digitalWrite(ledPin, HIGH);
    delay(500);
    digitalWrite(ledPin, LOW);
    delay(500);
}

With everything setup correctly, upload the code! Once the code finishes transferring, open the serial monitor and set the baud rate to 115200. You should see Hello, world!'s begin to fly by. You may also notice that when the ESP32 boots up it prints out a long sequence of debug messages. These are emitted every time the chip resets -- always at 115200 baud.

You should also see some blinking happening on the ESP32 Processor Board! Blink Blink Blink!