i have the 634-SI7210-B-00-IVR sensor and it has the device address 0x30. I wanna have the same sensor with a different address and when i search it i can find the same sensor from b-00 up to b-04 although the data sheet says, that there are only 4 different device id´s. does anyone have experience with this sensor and knows which one has whcih id
thx
The only way to do this is to have one of these:-
Then you can control 8 different devices.
From the Magnetic Sensors Selection Guide page 6:
You will need to order the sensor with a specific part number to match the I2C address you require, or use an I2C mux as already suggested.
The data sheet from here:-
https://uk.farnell.com/silicon-labs/si7201-b-20-ivr/hall-effect-magnetic-sensor/dp/3856489?CMP=KNC-MUK-GEN-KWL&msclkid=d71aed79dab4161261158a21aa1ebe41
Makes no mention of I2C at all, as a search of the data sheet will show.
... the datasheet for the si7210 (not si7201) does mention I2C ...
You can order the various addresses from Mouser by part number as noted on the data sheet. An easier way might be to use a controller with more than one I2C bus like the Raspberry Pi Pico.
Sry, i ment si7210 
Ty:)