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Having Issues with I2C OLED display
Posted: Tue Feb 04, 2025 4:31 pm
by Mihir Fulari
I have recently completed a smart aquarium project. The whole system is controlled through a rotary encoder and 1.3 inch OLED display. I realized later into its development that it is not suggested to use long cables to connect i2c devices. I have a custom 2 meter i2c cable which I have made but it appears that there is a lot of surrounding noise getting fed into the OLED display and I am unable to properly navigate through it. Any tips on how to suppress the noise (like a faraday cage)?
Re: Having Issues with I2C OLED display
Posted: Wed Feb 05, 2025 6:08 pm
by Pr4tham
Hi.
those are very long wires for I2C. Generally I2C doesn't work great with high capacitances. What are the pullup resistor values for I2C being used here?
Re: Having Issues with I2C OLED display
Posted: Thu Feb 06, 2025 5:06 pm
by Mihir Fulari
Pr4tham wrote: ↑Wed Feb 05, 2025 6:08 pm
Hi.
those are very long wires for I2C. Generally I2C doesn't work great with high capacitances. What are the pullup resistor values for I2C being used here?
I am using 5k pull ups on both ends (two 10k resistors in parallel)