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William Clark 9e67234a31 check validity of gas readings and if heater managed to reach target temp within given timeframe
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bme680.c check validity of gas readings and if heater managed to reach target temp within given timeframe 2023-11-06 17:02:41 +00:00
bme680.h check validity of gas readings and if heater managed to reach target temp within given timeframe 2023-11-06 17:02:41 +00:00
bst-bme680-ds001.pdf rewrite wip 2023-11-04 03:42:14 +00:00
i2c.c cleanup. i2c now its own unit. will do same for spi. 2023-11-05 23:43:43 +00:00
i2c.h cleanup. i2c now its own unit. will do same for spi. 2023-11-05 23:43:43 +00:00
main.c check validity of gas readings and if heater managed to reach target temp within given timeframe 2023-11-06 17:02:41 +00:00
Makefile rewrite wip 2023-11-04 03:42:14 +00:00
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registers.h SPI and I2C both working interchangeably 2023-11-06 14:41:32 +00:00
spi.c fix 2023-11-06 15:11:12 +00:00
spi.h SPI and I2C both working interchangeably 2023-11-06 14:41:32 +00:00

README.md

bme680

Example implementation of BME680 software. The I2C/SPI drivers are meant to run on a Raspberry Pi 4 but you can figure out how to port it.

Raspberry Pi

Connecting the purple BME680 module board to SPI:

SPI func BME680 Pin Raspberry Pi Pin
MISO "SDO" GPIO 9 (Pin 21)
MOSI "SDA" GPIO 10 (Pin 19)
SCLK "SCL" GPIO 11 (Pin 23)
CS "CS" GPIO 8 (Pin 24)

spi demo

par_t1: 26203
par_t2: 26519
par_t3: 3
par_p1: 35008
par_p2: -10284
par_p3: 88
par_p4: 9692
par_p5: -202
par_p6: 30
par_p7: 24
par_p8: -4
par_p9: -3469
par_p10: 30
par_h1: 794
par_h2: 1007
par_h3: 0
par_h4: 45
par_h5: 20
par_h6: 120
par_h7: -100
par_g1: 208
par_g2: 59781
par_g3: 18
range_switching_error: 19
res_heat_range: 1
res_heat_val: 46
float mode
tfine: 104478.758986
temp: 20.406008 degC
press: 99649.423644 Pa
humidity: 65.368724 % RH
gas resistance: 10989.279979 Ohm
== for heater target=300.0 and ambient temp=19.0 (degC)

i2c demo

par_t1: 26125
par_t2: 26370
par_t3: 3
par_p1: 36262
par_p2: -10371
par_p3: 88
par_p4: 6713
par_p5: -103
par_p6: 30
par_p7: 31
par_p8: -251
par_p9: -3158
par_p10: 30
par_h1: 776
par_h2: 1010
par_h3: 0
par_h4: 45
par_h5: 20
par_h6: 120
par_h7: -100
par_g1: 183
par_g2: 59281
par_g3: 18
range_switching_error: 19
res_heat_range: 1
res_heat_val: 39
float mode
tfine: 102706.944886
temp: 20.059950 degC
press: 99783.521673 Pa
humidity: 63.931961 % RH
gas resistance: 12028.902897 Ohm
== for heater target=300.0 and ambient temp=19.0 (degC)

Note: Two different BME680 devices, one on each type of bus. Low air pressure due to storm not bad sensor.