Hello:
I am using the latest C code provided in the gitHub repository: bme680.c, bme680.h, and bme680_defs.h
I have built a functional code module to configure and read the BME680. It configures good, I get back a 0x61 for the module type, and no other errors during the initialization or setup as I check the "rslt" flag each time.
The controller is a STM32L4 series and the I2C seems to be functioning good. I have an array of 30 bytes in which to contain the return data after a read.
This is passed back to the BME software via the read and write calls:
int8_t user_i2c_read(uint8_t dev_addr, uint8_t reg_addr, uint8_t *reg_data, uint16_t cnt)
int8_t user_i2c_read(uint8_t dev_addr, uint8_t reg_addr, uint8_t *reg_data, uint16_t cnt)
I am using the exact example code as provided on the page: https://github.com/BoschSensortec/BME680_driver, in the section "Example for reading all sensor data"
The read at an interval of 1 second. below is the first 12 prints from the conversion, along with the status byte.
[0]T: 21.61 degC, P: 940.05 hPa, H 100.00 %rH
status = 80
[1]T: 21.61 degC, P: 648.99 hPa, H 100.00 %rH
status = 80
[2]T: 21.61 degC, P: 648.99 hPa, H 100.00 %rH
status = 80
[3]T: 21.60 degC, P: 648.99 hPa, H 100.00 %rH
status = 80
[4]T: 21.60 degC, P: 648.99 hPa, H 100.00 %rH
status = 80
[5]T: 21.61 degC, P: 648.99 hPa, H 100.00 %rH
status = 80
[6]T: 21.60 degC, P: 648.99 hPa, H 100.00 %rH
status = 80
[7]T: 21.60 degC, P: 648.99 hPa, H 100.00 %rH
status = 80
[8]T: 21.60 degC, P: 648.99 hPa, H 100.00 %rH
status = 80
[9]T: 21.60 degC, P: 648.99 hPa, H 100.00 %rH
status = 80
[10]T: 21.60 degC, P: 648.99 hPa, H 100.00 %rH
status = 80
[11]T: 21.60 degC, P: 648.99 hPa, H 100.00 %rH
status = 80
[12]T: 21.60 degC, P: 648.99 hPa, H 100.00 %rH
status = 80
The temperature is very accurate, and it responds perfectly to any changes. However, the RH and Humidity seem to be incorrect. Humidity never moves from 100%, and the pressure (649hPa=65kPa)) should be close to the current value of 100kpA .
Can anyone provide some help on what the issue might be?
Thank you,
Gary