PT100 sensors over I2C interface - Raspberry Pi Forums

hello,

new in raspberry pi , run project contains 9 pt100 temperature sensors. need read values these sensors. have 2 options. first use 9 pt100s spi interface using max61385 chips. second option use i2c interface. question is, if there chips max61385 convert variable resistor value in digital value , support i2c interface (max61385 supports spi). if nobody knows, please suggest me kind measure pt100s on i2c? thermocouple not solution me

maybe xtr105 chip converts rtd value analog , usage of adc solution need more information chip numbers etc.

thanks,
dimitris

you can use 9 rtds on spi bus, too. there posts talking cs generated using 74hc138. way can use 16 pcs of rtds.

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