MPR121 I2C Address problem

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taknamecom
 
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Joined: Fri Jul 23, 2021 7:03 pm

MPR121 I2C Address problem

Post by taknamecom »

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.

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adafruit_support_carter
 
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Re: MPR121 I2C Address problem

Post by adafruit_support_carter »

MPR121 3x4 keypad.
Which specific product is this? Can you link to the product page.

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