draw-delay-on-of-30m
nazarijtipusak080/prototype-relay/draw-delay-on-of-30m
Writes string to display buffer. To show content of display buffer on screen use node send-buffer-to-display.
draw-delay-on-of-30m
@/draw-delay-on-of-30m
Writes string to display buffer. To show content of display buffer on screen use node send-buffer-to-display.
DEVwayland/ssd1306-oled-i2c/ssd1306-oled-i2c-device
An SSD1306 OLED device.
Xnumber
Cursor position x coordinate.
Ynumber
Cursor position y coordinate.
UPDpulse
Update. Trigger write to display buffer.
DONEpulse
Pulses on completion.
C++ implementation
#pragma XOD evaluate_on_pin disable
#pragma XOD evaluate_on_pin enable input_UPD
struct State {
};
{{ GENERATED_CODE }}
void evaluate(Context ctx) {
// The node responds only if there is an input pulse
if (!isInputDirty<input_UPD>(ctx))
return;
// Get a pointer to the `Adafruit_SSD1306` class instance
auto display = getValue<input_DEV>(ctx);
auto cursor_x = getValue<input_X>(ctx);
auto cursor_y = getValue<input_Y>(ctx);
// `length` returns the number of characters and you need an extra one to keep the
// terminal NUL-character used in C string representation. Initialize to 0’s to
// ensure the last char is indeed NUL
// The following line worked on Arduino, but would not compile for esp8266:
// char cString[length(xString) + 1] = { 0 };
// Bug fixed by the following four lines provided by Martin Brader:
// Use full 256 char 'Code Page 437' font
display->cp437(true);
display->setTextWrap(true);
display->setCursor(cursor_x, cursor_y);
display->setTextSize(0x01);
display->setTextColor(1);
display->println("some text");
emitValue<output_DONE>(ctx, 1);
}