Tried to get this to work "properly" using ESP tools. But really, just use the Arduino IDE, it's just a few steps and it's that simple: 1) Download the latest Arduino IDE 2) Visit github (dot)com/espressif/arduino-esp32 and follow the Instructions to add an ESP32 through the board. 3) Open the Arduino IDE under Tools → Board. Now there are many new boards at the bottom of the list. Select "Haltec WiFi Kit 32" - also select the correct COM port. 4) To view the library: Sketch → Include Library → Manage Libraries. find u8g2 and install it. Then paste this into the sketch: * reset = * / 16); // ESP32 OLED WiFi Kit on LED board #define LED_PIN 25 // ESP32 OLED WiFi Kit "PRG" button to call programs #define PRG_BUTTON_PIN 0void setup() { u8g2 .Start(); u8g2.setFont(u8g2_font_6x12_mf); // pretty small font u8g2.setFontRefHeightExtendedText(); u8g2.setDrawColor(1); // normal, not inverted u8g2.setFontPosTop(); // x,y are at the top of the font u8g2.setFontDirection(0); // not rotated u8g2.drawStr(0, 0, "It works!"); u8g2.sendBuffer();}This is my new development MCU. OLED makes debugging easy, and there's at least one "PRG" button to watch in your sketch. I bought more of these through another listing and it's the same charge. Oh, and don't press REALLY HARD on the face of the OLED like you're trying to smack it against another circuit board. If you do it hard enough you could break the edge of the LCD and destroy the words on display. :D So now I'm trying not to put any pressure on the OLED itself. These boards are pretty tough. Soldering isn't too difficult either - while you're near the ribbon cable for the display, keep the iron outside of the pin and board. Also, PWM on pins 25 and 26 is very easy to set up. // pwm# define SIG_OUT 26double freq = 15.8; const int pwmChannel = 0; // This is not an output pin that will be connected later! const int resolution = 10; // resolution 8, 10, 12, 15 -> higher frequency = lower resolution PinMode(SIG_OUT, OUTPUT); // Set up LED PWM functionality ledcSetup(pwmChannel, freq, Resolution); // connect a managed channel to GPIO2 ledcAttachPin(SIG_OUT, pwmChannel); // Set duty cycle based on 2^10 ledcWrite(pwmChannel, 64);
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