Use the OpenSmart TFT IL9320 Display 2.8 inch with touch function as a scene controller

The test application OpenSmartLcdTouch at ../../Tests/OpenSmartLcdTouch shows the touch point coordinates and pressure.

VERY IMPORTANT: After every getPoint call, you have to set the 4 pins back to inputs again, otherwise the writing to the TFT display fails!!!!!

For better pressure precision, we need to know the resistance between X+ and X-. Use any multimeter to read it. For the one we're using, its 397 ohms.

Programmimng the Arduino with pio run -t upload only works when the display is unplugged from the Uno.

With tft.setRotation(0), which is portrait mode with the icons at the bottom, the touch screen coordinate numbers range as follows:

Side Coordinate
Left 914
Right 122
Top 932
Bottom 91

The screen shows 4 rounded rectangles which serve as buttons.


MISO = M1, MOSI = M0

Component Pin Wire/Component Pin Component
NRF24L01+ VCC (3.3V) red 3V3 Arduino Uno 3.3V
NRF24L01+ GND brown GND Arduino Uno 3.3V
NRF24L01+ CE blue 9 ?? other pin! Arduino Uno 3.3V
NRF24L01+ CSN purple 10 ?? other pin!! Arduino Uno 3.3V
NRF24L01+ SCK yellow 13 Arduino Uno 3.3V
NRF24L01+ M0 (MOSI) gray 11 Arduino Uno 3.3V
NRF24L01+ M1 (MISO) white 12 Arduino Uno 3.3V
NRF24L01+ IRQ green 2 ?? Not connected Arduino Uno 3.3V
Tags: domotica nodes