I have an Uno R3 which works properly with an Adafruit 2.8” capacitive touch screen. However, I then inserted a Duinotech Screw shield between the Uno and the touchscreen so that I could add a real time clock to the setup. Unfortunately the screen then does not work. I only get the screen backlight working. If I touch the screen, it dims slightly, but it does not work. One point which may be relevant – I have soldered across the jumper pads on the touch screen to shift the SDA and SCL pins to the Arduino A4 and A5 pins. This is because the screw shield does not include SDA and SCL.
Has anyone else come across this, or has a suggestion, please?
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