STM32F103RB i2c with Arduino IDE

[Peter Paulsen]

Posted on July 06, 2018 at 16:23

Hi, guys!

Trying to connect the MCP4725 DAC to my STM32F103RB by following this tutorial:

https://learn.adafruit.com/mcp4725-12-bit-dac-tutorial/

 Sadly I'm getting no response. I've tried with a regular Arduino UNO, where everything works as it should. Also tried running a i2c scanner code, which gave no results. With the Arduino the correct address is 0x60.So do anybody know what I can do differently to get this working? Should the wiring be any different? What upload settings should I use?Best regards,Peter#i2c #f103 #arduino

[Peter Paulsen · Accepted solution]

Posted on July 09, 2018 at 09:42

Fixed it! Just had to add some pull up resistors! Works fine now :)