I2C2 now working on pico?

You are reading a single comment by @alexanderbrevig and its replies. Click here to read the full conversation.

•

alexanderbrevig
Did you add the pullup resistors @user54499? They are necessary to keep a reliable state on the bus. Devices that are inherently slaves should not have pullups (though some will have them in 20k-100k range and will provide a weak current).
I would add 4k7 (seems to be a popular compromise) near the master and see if it helps.
```
R = 4k7 (4700) ohm

VCC--+--+
     |  |
     R  R
     |  |
SDA--+--|--->
SCL-----+--->
```

About

Avatar for alexanderbrevig @alexanderbrevig started