Hello forum.
I have problem with Arduino Wemos D1 R1 and MPR121 3x4 keypad.
I connect keypad to Wemos with I2C , 3V and GND Pins.
also LCD 16x2 with i2c connection is connected to board.
It get randomly i2c address , sometimes 0x5A and sometime 0x5B
I checked it on 10 mpr121 boards.
whats the problem?
thank you.
MPR121 I2C Address problem
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- adafruit_support_carter
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Re: MPR121 I2C Address problem
Which specific product is this? Can you link to the product page.MPR121 3x4 keypad.
Please be positive and constructive with your questions and comments.