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About cweaver
since
01-09-2022
04-06-2022
cweaver
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04-06-2022
10:46 PM
I can't. I have an intermediary controller that helps communicate between a Raspberry Pi and 32 I2C buses.
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03-22-2022
04:11 PM
Thank you. I have tried and confirmed that my order of operations is identical to the parallelmode sample. Do you have any insight on approximate parameter values?
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03-14-2022
06:11 PM
I am collecting TPHG data from an array of 64 BME688 sensors to identify gases. For now, I just want to collect raw gas resistance and may add the BSEC algorithm in the future. When I collect data, the GAS_MSB = 0x00, GAS_LSB = 0x04 and the upper byte of MEAS_STATUS changes from 0xE and 0x8. Let me know if there's any other information I can provide. Thank you so much!
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03-12-2022
11:10 PM
Hi! I'm working on a project involving an array of BME688 sensors and I can't use the provided BME68x API code. I'm currently having issues collecting the gas sensing data and was hoping someone could look over the parameters I'm using. Perhaps, I have an error in how I calculate or read my data. I collect data about every 100ms. I'm hoping to add more heater profiles once I get one working. Also, there is a significant current draw once I set the sensors to parallel mode. Thanks for any help! osrs_t = 0b001 osrs_p = 0b010 osrs_h = 0b100 iir_filter = 0 nb_conv = 0b001 gas_wait_shared = 18 gas_wait_0 = 20 res_heat_0 = 193
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01-25-2022
12:26 AM
I've been reading through the BME688 datasheet and the BME68x API and am confused about the purpose of the Gas_wait registers. From what I can tell, the res_heat values are fully calculated using a target temperature and the sensor parameters. If this sets the target resistance for a target temperature, what is the purpose of the gas_wait register? Does it take a significant amount of time to heat up and therefore other values (TPH) can be evaluated during this period? Thanks for any clarification!
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