фиксы до работы с перемычкой вместо оптики

OpticalChannelTester/Display.cpp

@@ -1,5 +1,6 @@
 #include "Display.h"
 #include "Config.h"
+#include "Log.h"
 #include <Wire.h>
 #include <string.h>
 
@@ -9,6 +10,7 @@ bool Display::begin() {
   Wire.begin(GPIO_SDA, GPIO_SCL);
   ok_ = oled_.begin(SSD1306_SWITCHCAPVCC, OLED_ADDRESS);
   if (ok_) { oled_.setTextColor(SSD1306_WHITE); oled_.setTextSize(1); }
+  Log::printf("OLED", "initialization %s, I2C address=0x%02X", ok_ ? "OK" : "FAILED", OLED_ADDRESS);
   return ok_;
 }
 
@@ -22,9 +24,11 @@ void Display::fit(char *s) {
 }
 
 void Display::show(const char *a, const char *b) {
-  if (!ok_) return;
   char one[32], two[32];
   snprintf(one, sizeof(one), "%s", a ? a : ""); snprintf(two, sizeof(two), "%s", b ? b : "");
+  // Serial is the primary UI mirror and remains available when OLED is absent.
+  Log::printf("UI", "%s | %s", one, two);
+  if (!ok_) return;
   fit(one); fit(two);
   oled_.clearDisplay(); oled_.setCursor(0, 3); oled_.print(one);
   oled_.setCursor(0, 19); oled_.print(two); oled_.display();
@@ -41,4 +45,3 @@ void Display::formatDuration(uint64_t us, char *out, size_t n) {
   if (minutes < 60) snprintf(out, n, "%02llu:%02llu", minutes, (us / 1000000ULL) % 60ULL);
   else snprintf(out, n, "%llu:%02llu", minutes / 60ULL, minutes % 60ULL);
 }
-