налажена связь между 2 esp

OpticalChannelTester/Display.cpp

@@ -2,14 +2,28 @@
 #include "Config.h"
 #include "Log.h"
 #include <Wire.h>
+#include <esp_log.h>
 #include <string.h>
 
 Display::Display() : oled_(128, 32, &Wire, -1) {}
 
 bool Display::begin() {
   Wire.begin(GPIO_SDA, GPIO_SCL);
+  // An absent optional OLED produces a large burst of ESP-IDF NACK messages.
+  // Probe it once and keep the I2C driver quiet when no display is connected.
+  esp_log_level_set("i2c.master", ESP_LOG_NONE);
+  Wire.beginTransmission(OLED_ADDRESS);
+  if (Wire.endTransmission() != 0) {
+    ok_ = false;
+    Log::printf("OLED", "not detected at I2C address=0x%02X", OLED_ADDRESS);
+    return false;
+  }
   ok_ = oled_.begin(SSD1306_SWITCHCAPVCC, OLED_ADDRESS);
-  if (ok_) { oled_.setTextColor(SSD1306_WHITE); oled_.setTextSize(1); }
+  if (ok_) {
+    oled_.setRotation(OLED_ROTATION);
+    oled_.setTextColor(SSD1306_WHITE);
+    oled_.setTextSize(1);
+  }
   Log::printf("OLED", "initialization %s, I2C address=0x%02X", ok_ ? "OK" : "FAILED", OLED_ADDRESS);
   return ok_;
 }