I 'm working on a little project with a Grid Eye AMG8833 Infrared Array Sensor.
The measured values are displayed on a TFT display.
I used an UNO R3 and it worked fine but slow.
So I tried an UNO R4 and it doesn't work. The I2C communication between the R4 and the Grid Eye is not ok. The sketch is properly loaded and is sending error codes error (-99) codes to the monitor.
I 'm using the 'SparkFun_GridEYE_Arduino_Library' , also the Arduino Wire library is involved.
I already tried a I2C adress scanner; With the R3 the scanner found the correct adress x069.
With the R4 nothing was found.
I also tried examples in the Sparkfun library. Same results, With R3 ok, with R4 nok.
With example 4 I measured the SDA and CLK signals. With the R3 they are in good shape.
With the R4 ->errorcode -99 and no signals; SDA = HIGH and CLK = Low.
On using the R4 I saw that the compiler gives some Warnings. They are about the bufferlenght for I2C.
They are changed to 255 and back to 32. It has to do with using the UNO R4.
I 'm wondering if the library is compatible with the UNO R4.
Who can help me?
See this thread
@ard_fgk please answer the question in the last post of that thread. I have the impression that you are not paying attention to the help you are getting.
The problem is solved by placing a level shifter.