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About mayor
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10-21-2020
01-27-2022
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Solution
11-05-2020
11:32 AM
Hi, I have two BME680s running on the same hardware/software platform. One is producing strange oscillations, the other is fine. Is there anything I can do to sort it out? Is it a defective unit? Samples are taken every 60 seconds, using code largely inspired by the Bosch GitHub examples, ie: /* Set the temperature, pressure and humidity settings */
gas_sensor.tph_sett.os_hum = BME680_OS_2X;
gas_sensor.tph_sett.os_pres = BME680_OS_4X;
gas_sensor.tph_sett.os_temp = BME680_OS_8X;
gas_sensor.tph_sett.filter = BME680_FILTER_SIZE_3;
/* Set the remaining gas sensor settings and link the heating profile */
gas_sensor.gas_sett.run_gas = BME680_ENABLE_GAS_MEAS;
/* Create a ramp heat waveform in 3 steps */
gas_sensor.gas_sett.heatr_temp = 320; /* degree Celsius */
gas_sensor.gas_sett.heatr_dur = 150; /* milliseconds */
/* Select the power mode */
/* Must be set before writing the sensor configuration */
gas_sensor.power_mode = BME680_FORCED_MODE; Oscillating: Oscillating Working: Normal
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10-30-2020
11:19 AM
Thanks- the right lib for this target is the IAR 7 version for Cortex M4F. I had tried the gcc and armcc versions to no avail.
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10-29-2020
10:40 PM
Hi, uh, I don't see CC13XX as an option in the BSEC package anywhere. Do you have a URL? The arduino github doesn't seem to contain it, nor does the latest BSEC download.
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10-29-2020
09:36 PM
Hello, wondering if the BSEC library has been compiled against the TI CC13X2 Cortex M4F target? I've tired the Cortex M4F lib that's currently available, but the linker is having problems finding symbols when I try "bsec_init();" undefined first referenced
symbol in file
--------- ----------------
__hardfp_floorf /LIBS/BME680/bosch/BSEC/Cortex_M4F/libalgobsec.lib<GasHumidityBaselineTracker.o>
__hardfp_fminf /LIBS/BME680/bosch/BSEC/Cortex_M4F/libalgobsec.lib<GasHumidityBaselineTracker.o>
__hardfp_log10f /LIBS/BME680/bosch/BSEC/Cortex_M4F/libalgobsec.lib<log10.o>
__hardfp_sinf /LIBS/BME680/bosch/BSEC/Cortex_M4F/libalgobsec.lib<HumidityTemperatureCorrector.o>
__hardfp_sqrtf /LIBS/BME680/bosch/BSEC/Cortex_M4F/libalgobsec.lib<sqrt.o> Am I missing something?
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10-22-2020
12:41 PM
Hi Vincent, thanks for your patience and help on this. It was entirely on my end (yes i2c writes were a problem still), so apologies for the waste of bandwidth. Results now: T: 23.1599 degC, P: 1021.8499 hPa, H 39.4690 0.0000rH , G: 21594 ohms
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