I cannot see any text on my LCD when using I2C.
LCD works when connected directly to the Arduino
MC is ElEGOO Uno R3
Backpack is PCF 8571T
LCD is the one that comes with the Arduino starter kit (I couldn't find any ID on it).
I followed Bill's great instructions to run I2Cexpdiag
Here's the report from I2Cexpdiag:
Checking for required external I2C pull-up on SDA - YES
Checking for required external I2C pull-up on SCL - YES
Checking for I2C pins shorted together - Not Shorted
Scanning i2c bus for all lcd displays
LCD at address: 0x27 | config: P01245673H | R/W control: Yes
Total LCD devices found: 1
No working LCD devices
- I see 16 squares on the top line (2,16) line of the LCD.
- Second line is blank.
- I've carefully examined and cleaned all solder joints
- The PCB foil beneath DB1 on the LCD could be damaged but I don't think so
Thanks for looking,