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@@ -174,3 +174,82 @@ Watch Ben Eater's Reliable data transmission: https://www.youtube.com/watch?v=eq
 ![game-372-a.jpg](./screenshots/game-372-a.jpg "game 372 screenshot")
 ![game-372-b.jpg](./screenshots/game-372-b.jpg "game 372 screenshot")
 ![game-372-c.jpg](./screenshots/game-372-c.jpg "game 372 screenshot")
+
+
+## [DAY-373] communication
+
+
+Make a simple interface to draw characters/shapes on ssd1306 oled display
+
+![game-373.jpg](./screenshots/game-373.jpg "game 373 screenshot")
+
+
+> I made the code and the device, but left the part that handles the keypresses to her, I printed the gfx pdf: https://cdn-learn.adafruit.com/downloads/pdf/adafruit-gfx-graphics-library.pdf of course she decided to write a$$ :)
+
+```
+#include <SPI.h>
+#include <Wire.h>
+#include <Adafruit_GFX.h>
+#include <Adafruit_SSD1306.h>
+
+Adafruit_SSD1306 screen(128, 64, &Wire, -1);
+int pins[6] = { 12, 11, 10, 7, 6, 4 };
+int pressed[6] = { 0, 0, 0, 0, 0, 0 };
+
+void setup() {
+  Serial.begin(9600);
+
+  screen.begin(SSD1306_SWITCHCAPVCC, 0x3C);
+  screen.clearDisplay();
+  screen.display();
+
+  // setup pins to INPUT mode
+  for (int i = 0; i < 6; i++) {
+    pinMode(pins[i], INPUT_PULLUP);
+  }
+}
+
+void loop() {
+  for (int i = 0; i < 6; i++) {
+    int v = digitalRead(pins[i]);
+    if (v == 0) {
+      // press
+      if (!pressed[i]) {
+        pressed[i] = 1;
+        press(i);
+      }
+    } else {
+      pressed[i] = 0;
+    }
+  }
+}
+int x = 0;
+
+void press(int button) {
+  if (button == 0) {
+    screen.clearDisplay();
+  }
+  if (button == 1) {
+    screen.drawChar(x, 30, 65, WHITE, BLACK, 5);
+    x += 25;
+  }
+  if (button == 2) {
+    screen.fillRect(x, 32, 40, 20, WHITE);
+  }
+  if (button == 3) {
+    screen.drawChar(x, 30, 36, WHITE, BLACK, 5);
+    x += 25;
+  }
+  if (button == 4) {
+    screen.fillRoundRect(x, 40, 20, 20, 10, WHITE);
+  }
+  if (button == 5) {
+    screen.fillTriangle(x, 20, 45, 40, 60, 63, WHITE);
+  }
+
+
+
+  screen.display();
+}
+
+```