Smart Electronics LCD Module Display Monitor 1602 5V Blue

LiquidCrystal-Display blue 1602 Arduino Nano

I recently bought several “Smart Electronics LCD Module Display Monitor 1602 5V Blue” for building a wifi alarm clock. It uses the very common Hitachi HD44780 driver. To verify if they are working I followed this well described tutorial on arduino.cc and used a arduino nano for that. Removing the 10k ohms resistor, because it dimmed the LED background light way to much and after adjusting the potentiometer to about 1,64k ohms the visibility of desired output was optimal.

For the sake of documentation the:

Wiring

Code

The next step is to connect it to an esp8266 and figuring out if the new 3.3V signal strength will be enough. A possible solution would be to use the esp8266 only as a communication device.