// Calibration code for touchscreen : for 4 inch & Rotation = 3
tft.setRotation(3);
uint16_t calData[5] = { 312, 3564, 379, 3395, 0 };
tft.setTouch(calData);
Thats the Data for MY TFT!! Maybe we need an Option at beginning on to check and Calibrate the TFT first bevor the H.Radio start. Maybe stored in a File like /TouchCalData3. And the H.Radio its looking for this File, if its present, the TFT its calibratet and H.Radio starts , if they not found this File, the Calibrating starts and the Data´s will be stored in this File in the SPIFFS Folder.
OR...maybe you have a other Idea!?

Klaus