* companion: SSD1306 display now dynamically detected at runtime.

src/helpers/ui/SSD1306Display.cpp

@@ -1,7 +1,13 @@
 #include "SSD1306Display.h"
 
+bool SSD1306Display::i2c_probe(TwoWire& wire, uint8_t addr) {
+  wire.beginTransmission(addr);
+  uint8_t error = wire.endTransmission();
+  return (error == 0);
+}
+
 bool SSD1306Display::begin() {
-  return display.begin(SSD1306_SWITCHCAPVCC, DISPLAY_ADDRESS, true, false);
+  return display.begin(SSD1306_SWITCHCAPVCC, DISPLAY_ADDRESS, true, false) && i2c_probe(Wire, DISPLAY_ADDRESS);
 }
 
 void SSD1306Display::turnOn() {

src/helpers/ui/SSD1306Display.h

@@ -3,6 +3,7 @@
 #include "DisplayDriver.h"
 #include <Wire.h>
 #include <Adafruit_GFX.h>
+#define SSD1306_NO_SPLASH
 #include <Adafruit_SSD1306.h>
 
 #ifndef PIN_OLED_RESET
@@ -18,6 +19,7 @@ class SSD1306Display : public DisplayDriver {
   bool _isOn;
   uint8_t _color;
 
+  bool i2c_probe(TwoWire& wire, uint8_t addr);
 public:
   SSD1306Display() : DisplayDriver(128, 64), display(128, 64, &Wire, PIN_OLED_RESET) { _isOn = false; }
   bool begin();