05-01-2019, 20:57
(05-01-2019, 09:23)41south Wrote: Are you meaning in regard to it being 5v levels due to the extended bus?
I have made sure that any modules I buy are 5v compatible such as this one from Adafruit. Or is there another issue to be aware of?
https://www.adafruit.com/product/2857
Its not about the voltage, its about the current required on the Extended I2C bus.
After having noticed a considerable drop on the lifetime of the new SHT31 modules, engolling and t3gathome, did a research on this matter, and have concluded that the SHT31 chip can only drive 5mA while the Extended I2C bus may require up to 30mA.
Older models of the SHT31 modules used some transistors to act as levels shifters, those transistors can deal with the current required by the Extended I2C bus, that's why they can work connected directly on the EI2C port.
I trust on the engolling and t3gathome conclusions, that's why I'm talking about it.