How to use SHT21 humidty sensor with i2c2 on STM32F103?

[kadir ustun1]

Hello everyone,

I want to receive humidty from SHT21 sensor. I received first or a few data and then this communication stop. Why? Can you help me please ?

http://www.farnell.com/datasheets/1780639.pdf this is datasheet of SHT21

Thank you

[Eleon BORLINI]

Hi @kadir üstün​ , did you check the I2C pattern with an oscilloscope or a pattern analyzer? You should take care of pull-up values and of Vdd/VddIO range, but I suggest you to directly check the issue with Sensirion company support. Regards