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About jlehman
since
02-27-2019
03-18-2019
jlehman
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Solution
03-18-2019
09:17 PM
Found my problem. The write function was using an uninitialized stack value, causing random values to be sent to the control registers of the BMS280.
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03-15-2019
12:32 AM
I am using forced once every 5 minuetes. I am using the code as presented in the BME280 datasheet. See attached source file #define CTRL_HUM_VAL 0x01 // 1x samples of humidity #define CTRL_MEAS_VAL 0b00100101 // 1x samples of temp and pressure in force mode #define CONFIG_VAL 0x00 // no filter and forced trigger The read is a one block read of 8 bytes at address 0xF7 #define DATA_BLK_ADR 0xF7 #define DATA_BLK_LEN 8 I have attached the code and a 14hr run where you can see the pressure going in and out of the correct value.
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03-14-2019
02:48 AM
I am using the BME280 to get temp, pressure and humidity in demand mode 1/sec. I have over sampling for each parameter set to 1. Temp and humidity work. The pressure should be around 1020 but comes back around 630. Sometimes I get the correct value but most of the time it is stuck in the 630s. Any idea what I am doing wrong? I am using the 64 bit compensation functions from the data sheet. Thanks
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- BME280
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