I'm starting working with Arduino UNO and LCD screens. I bought the uLCD-144-G2 but I can't show info in the screen. I think the connection is right but I'm not sure. The connection is the following:
+5V of LCD is connected with +5V of Arduino
GND of LCD is connected with GND of Arduino
RESET of LCD is connected with the digital pin 8 of the Arduino (for example)
RX of LCD is connected with the TX of Arduino
TX of LCD is not connected
For example, I would like to show "HELLO" in the screen but I can't it. Could you help me about the code and if the connection is right, please?
The uLCD-144-G2 is a Serial display, which talks over a Serial UART, not SPI and not I2C.
I am unsure what TFT.h library is, but it most certainly is not a library made by 4D Systems.
Looking at your screenshots you have the display with SPE (Serial Platform Emulator) loaded, which is the default configuration when shipped. You talk to the uLCD-144-G2 using the Serial Protocol, and use the Serial Library which they provide.