Joseph Ellsworth
Testing SHT75 humidity sensor on STM F303K8 board.
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Nucleo-F303K8-SSD1306_OLED
by 
Joseph Ellsworth
Sample code to test SHT75 humidity sensor using STM F303K8 board. Uses a 3.3V from board to power sensor. 10K resistor Pull-up on data. Must not be on same pins as I2C. Uses D0 for Clk and D1 for Data.
I had to modify sample code supplied by https://developer.mbed.org/users/nimbusgb/code/SHT75/ because the sensor failed to read without the softReset() and readStatus() at beginning of measurement loop. I think this is caused by the 72Mhtz speed of the F303K8 but did not attempt to fully diagnose.
The readStatus() method from library seems to malfunction and always return a -1 which never changes even when sensor is unplugged.
See https://www.sensirion.com/fileadmin/user_upload/customers/sensirion/Dokumente/Humidity_Sensors/Sensirion_Humidity_Sensors_SHT7x_Datasheet_V5.pdf section 2.1 for wiring.
mbed.bld@5:4b66dfbc52a5, 2016-07-27 (annotated)
- Committer:
- joeata2wh
- Date:
- Wed Jul 27 19:54:51 2016 +0000
- Revision:
- 5:4b66dfbc52a5
- Parent:
- 0:fa185766e039
updated comments
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| joeata2wh | 0:fa185766e039 | 1 | http://mbed.org/users/mbed_official/code/mbed/builds/c0f6e94411f5 |