I2C Length limitations & MCP2221A

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calemaynes
 
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I2C Length limitations & MCP2221A

Post by calemaynes »

I have an IoT system that uses 2x bmp280 pressure sensors roughly 120" away from an RPi4. I have been told that this is too long for the I2C protocol to give clean data. Would it be better to use the MCP2221A USB-I2C breakout board, or is my only option to switch to SPI?

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adafruit_support_bill
 
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Re: I2C Length limitations & MCP2221A

Post by adafruit_support_bill »

There is the LTC4311 I2C Active Terminator which can greatly extend the range of the bus:
https://www.adafruit.com/product/4756

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