Review on π΅ ICQUANZX 2PCS 2004 20x4 LCD Module IIC I2C Interface Adapter Blue Backlight - Arduino R3 & Raspberry MEGA2560 Compatible by Jeff Warne
Working but I2C driver board is not sold separately
I received this item because the photos led me to believe that the I2C interface board was not soldered, giving me the flexibility to use the parallel interface or serial I2C. One photo even shows an Arduino configured to drive a display without an I2C board, complete with an external contrast potentiometer. It wasn't like that; The I2C board is soldered and it took a long time to desolder it. The contrast potentiometer on the I2C board was all the way down so at first I thought something was wrong, but the text cleared up when I cropped it a bit.
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