Greetings. Thank you for reading this.
I am connecting my MLX90614 sensor in I2C bus with 16x02 lcd. I used Adafruit library, I2C LCD library and Wire.h.
When I uploaded the code, the lcd displays weird numbers and letters that I didn't expect. I scan first using I2C Scanner and it found an address of "90" or "0x5A" and upload the code again. This time, it works perfectly fine. The lcd display what I want to see.
HOWEVER, when I want to change the power supply from USB cord (I can't bring my laptop all around) into power adapter. I remove the USB cord and insert the barrel jack, reset the UNO hoping to read the code again. This time, the LCD is displaying weird again. I think, the MLX90614 address wasn't recognize/found by my UNO R3.
If you please, HELP me with this? Your advice is so much appreciated. Thank you so much.