Hello,
Today I done some new test. The hardware configuration remain the same but I added delay_ms(10) in two positions in software: between initialization and sweep (you suggested 1 ms) and after loop for waiting correct results (checking D2 bit in status register)
//wait for correct results
while(!(Byte_read(0x8F) & 0x02));
delay_ms(10);
Results are now closer to true value but they are still no repeatable... Here is the graph.
Regards.
