can use OLED (ssd1306) display with esp32 too

tools/esp8266/app.cpp

@@ -36,7 +36,9 @@ app::app() {
 }
 
 #ifdef ENA_SSD1306
-SSD1306Wire display(0x3c, 4, 5);
+/* esp8266 : SCL = 5, SDA = 4 */
+/* ewsp32  : SCL = 22, SDA = 21 */
+SSD1306Wire display(0x3c, SDA, SCL);
 
 static unsigned char bmp_arrow[] PROGMEM = {
         B00000000, B00011100, B00011100, B00001110, B00001110, B11111110, B01111111,

tools/esp8266/platformio.ini

@@ -144,3 +144,21 @@ monitor_filters =
 	;default   ; Remove typical terminal control codes from input
 	time      ; Add timestamp with milliseconds for each new line
     log2file  ; Log data to a file “platformio-device-monitor-*.log” located in the current working directory
+
+[env:esp32-wroom32-ssd1306]
+platform = espressif32
+board = lolin_d32
+build_flags = -D RELEASE -std=gnu++14 -DENA_SSD1306
+build_unflags = -std=gnu++11
+monitor_filters =
+	;default   ; Remove typical terminal control codes from input
+	time      ; Add timestamp with milliseconds for each new line
+    ;log2file  ; Log data to a file “platformio-device-monitor-*.log” located in the current working directory
+
+lib_deps =
+    https://github.com/yubox-node-org/ESPAsyncWebServer
+	nrf24/RF24
+	paulstoffregen/Time
+	knolleary/PubSubClient
+	bblanchon/ArduinoJson
+    https://github.com/ThingPulse/esp8266-oled-ssd1306.git