• Install Arduino IDE, for more information see the Official documentation
  • Installing ESP8266 NodeMCU Board in Arduino IDE 2.0
• How to install CH340 driver - Driver Download Section

• Dev Board: Wemos D1 Mini
• Microcontroller: ESP8266 12-E Chip ESP8266 hardware review

Here it gets practical! You need to solder the microcontroller and some of the sensors, which you will need in the next session. Fig. 1: In Action at UNICAES

Now let's check if your Microcontroller works. Also, you will learn how to upload your first sketch. Basic Blink example:

Blink.ino

void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED_BUILTIN, OUTPUT);
}
 
// the loop function runs over and over again forever
void loop() {
  digitalWrite(LED_BUILTIN, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(1000);                      // wait for a second
  digitalWrite(LED_BUILTIN, LOW);   // turn the LED off by making the voltage LOW
  delay(1000);                      // wait for a second
}

Additional information: Introduction to IoT - Sensors and Data processing