wiring · h.m.f #1

Playground

Wire power through the + / − rails, then the two I²C lines — plug both ends of each jumper into the holes.

0/ 6

wires connected

Connections

Drag each jumper end into a hole — one in the part's column, the other in its destination column or rail. Or click a row to plug it in.

OLED VDD → + railOLED power off the + rail
5V → + railESP feeds the + rail
OLED GND → − railOLED ground
G → − railESP feeds the − rail
OLED SCK → GPIO6I²C clock — PIN_SCL
OLED SDA → GPIO5I²C data — PIN_SDA

Firmware

What this level looks like on the real pet — same config.h.

#include <Wire.h>
#include <U8g2lib.h>
#include "config.h"

U8G2_SSD1306_128X64_NONAME_F_SW_I2C oled(
    U8G2_R0, /* SCL = */ PIN_SCL, /* SDA = */ PIN_SDA);

void setup() {
  oled.begin();           // wake the SSD1306 at I²C address 0x3C
}

void loop() {
  oled.clearBuffer();
  drawFace(oled);         // procedural face — blink, gaze, swap
  oled.sendBuffer();      // ship the 128×64 frame to the panel
}