I found that the display should have a charge pump to get the needed LCD voltage if VCC is 3.3V. But this charge pump is not fitted on my display, so it is not for 3.3V use :( Thanks, Pollin ... But fitting this charge pump may be an alternative to 5V and I2C level shifters. https://www.element14.co...

Hello, I have connected an ODROID 20x4 LCD from Pollin: https://www.pollin.de/p/odroid-h2-i2c-20x4-lcd-modul-810957 I can see the text on the display, but it is also weak and dark and not white as it should be. If I reconnect the display while ESPeasy is running, I get (of course) random characters,...