BMP280 read reset values in normal mode

Hello

Reading temp and press from BMP280 in normal mode, return reset values 0x80000 for both of them.

In forced mode reading returns expected values.

I use the APIs provided here https://github.com/boschsensortec/BMP2-Sensor-API, ported for ESP32.

I'm aware about the old topic /mems-sensors-forum-jrmujtaw/post/bmp280---always-initial-values-wfe6w4mIV3wDFrD but the behavior i see is different. and the sensor power supply should be fine.

In my case after a power cycle of the system, the reading is normal. If i reset esp32 (hard or soft) then reading returns 0x80000. This happens only if power mode is set to BMP2_POWERMODE_NORMAL. If power mode is set to BMP2_POWERMODE_FORCED then no issue.

API sequence used is the following in both cases: normal and forced

1. bmp2_init()
2. bmp2_get_config() // get initial configuration
3. bmp2_set_power_mode() // set power mode and new configuration
4. bmp2_get_config() // ensure new values are stored on device
5. // bmp2_set_regs() //select forced mode in 0xf4 ; commented out in normal mode
6. bmp2_get_status() // not needed for normal mode, but i keep it here for forced mode
7. bmp2_get_sensor_data()
8. loop to #5

The configuration i use is this one:

conf.os_mode = BMP2_OS_MODE_ULTRA_HIGH_RESOLUTION;
conf.filter = BMP2_FILTER_COEFF_16;
conf.os_pres = 0; 
conf.os_temp = 0; 
conf.odr = BMP2_ODR_500_MS;

and i can see it in registers.

It puzzles me it works fine after power cycle but not after reset. My guess is that a power cycle does a reset of bmp280 different from the software reset.

What can i do to bring the sesor in working mode after reset?

Regards

Ves011