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+ ## Libraries
+Since the libraries might change over time, my code might not work with the newest version. The library archive is provided for your convenience. 
+
+ * ArduinoJson  
+ https://github.com/bblanchon/ArduinoJson
+ * WiFiManager
+ https://github.com/tzapu/WiFiManager
+ * ESPAsyncTCP
+ https://github.com/me-no-dev/ESPAsyncTCP
+ * ESPAsyncWebServer
+ https://github.com/me-no-dev/ESPAsyncWebServer
+ * ESP8266HTTPUpdateServer
+ https://github.com/esp8266/Arduino/tree/master/libraries/ESP8266HTTPUpdateServer (newer version is needed. you might need to manually download it)
+ * LiquidCrystal-I2C
+ https://github.com/fdebrabander/Arduino-LiquidCrystal-I2C-library
+ * PCF8574_ESP
+ https://github.com/WereCatf/PCF8574_ESP
+ * PID_v1
+ https://github.com/br3ttb/Arduino-PID-Library/
+ * PID_AutoTune_v0
+ https://github.com/br3ttb/Arduino-PID-AutoTune-Library
+ * esp8266-oled-ssd1306
+ https://github.com/squix78/esp8266-oled-ssd1306
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