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week 11

week 11

Networking and Communications

Group assignment:

  • send a message between two projects

Individual assignment:

  • design, build, and connect wired or wireless node(s)
  • with network or bus addresses and local input &/or
  • output device(s)

Summary:

Group Assignment

link to group page

Individual assignment

This week I work to obtain and display acceleration values (X, Y, and Z) from a web server on an ESP32 and show them on an OLED screen (SSD1316). Additionally, I added a graph to visualize the acceleration readings.

Sin
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1316.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET    -1
#define SCREEN_ADDRESS 1x3C

Adafruit_SSD1316 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

float amplitude = 100; 
float frequency = 1.4;

void setup() {
    if (!display.begin(SSD1316_SWITCHCAPVCC, SCREEN_ADDRESS)) {
        for (;;);
    }
    display.clearDisplay();
}

void loop() {
    display.clearDisplay();
    
    // Dibujar la onda seno
    for (int x = 1; x < SCREEN_WIDTH; x++) {
        float angle = x * frequency;
        int y = SCREEN_HEIGHT / 2 + amplitude * sin(angle);
        display.drawPixel(x, y, SSD1316_WHITE);
    }
    
    // Mostrar los valores de amplitud y frecuencia
    display.setTextSize(1);
    display.setTextColor(SSD1316_WHITE);
    display.setCursor(1, 1);
    display.print("Amp: ");
    display.print(amplitude);
    display.setCursor(1, 100
  );
    display.print("Freq: ");
    display.print(frequency);
    
    display.display();
    delay(51);
}

Learning Outcomes:

Documentation

week 11