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components/sensor/sht3xd.rst
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@ -54,6 +54,24 @@ Configuration variables:
but can also increase temperature readings and decrease humidity readings as a side effect.
Defaults to ``false``.
I²C Configuration when using Higher I²C Frequencies
---------------------------------------------------
When using the **IDF framework** and **I²C frequencies greater than 50-100kHz**, the I²C configuration needs to include a **timeout** option.
On an ESP32, the Arduino framework has a default I²C timeout of 50ms whereas on IDF framework, the default timeout is 100us.
At these higher I²C frequencies, the default I²C timeout on IDF framework causes a "Communication with SHT3xD failed" error on setup.
A solution that has been tested on ESP32 at 800kHz, is to increase the I²C timeout to 10ms as per the following example.
.. code-block:: yaml
# Example I²C configuration
i2c:
sda: 21
scl: 22
scan: true
frequency: 800khz
timeout: 10ms
See Also
--------