Hi,
I can successfully setup a tph read using the following function call sequence as per the forced mode example:
init_I2c (my fcn to init my i2c link)
bme68x_set_conf (setup a config in which I am sampling 1x for temp and press and 8x for humidity, no filter or odr)
bme68x_set_heatr_conf (with heater disabled)
bme68x_set_op_mode (to enable forced mode read)
bme68x_get_meas_dur (to get the read delay)
... wait the read delay ... about 25 mSec
bme68x_get_data (read the data)
All data seems valid and accurate. Temp is 21 degC, pressure is just over 100 kPa, and RH is 46 percent. This matches other sensors nearby.
I then try and repeat forced reads every min by repeating bme68x_set_op_mode (), bme68x_get_meas_dur(), wait, bme68x_get_data() every min.
... and both temp and pressure data looks good, but humidity always reads 100 percent.
If I execute bme68x_set_conf(), bme68x_set_heatr_conf() with heater still off, bme68x_set_op_mode (), bme68x_get_meas_dur(), wait, bme68x_get_data() every min, all data looks ok.
Why do I need to set configs each time in order to get valid humidity data?
Thanks in advance.
Mark J