96 lines
1.8 KiB
Markdown
96 lines
1.8 KiB
Markdown
# bme680
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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.
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Connecting the purple BME680 module board to SPI:
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| SPI func | BME680 Pin | Raspberry Pi Pin |
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| -------- | ---------- | ---------------- |
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| MISO | "SDO" | GPIO 9 (Pin 21) |
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| MOSI | "SDA" | GPIO 10 (Pin 19) |
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| SCLK | "SCL" | GPIO 11 (Pin 23) |
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| CS | "CS" | GPIO 8 (Pin 24) |
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## spi demo
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```
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par_t1: 26203
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par_t2: 26519
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par_t3: 3
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par_p1: 35008
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par_p2: -10284
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par_p3: 88
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par_p4: 9692
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par_p5: -202
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par_p6: 30
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par_p7: 24
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par_p8: -4
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par_p9: -3469
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par_p10: 30
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par_h1: 794
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par_h2: 1007
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par_h3: 0
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par_h4: 45
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par_h5: 20
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par_h6: 120
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par_h7: -100
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par_g1: 208
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par_g2: 59781
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par_g3: 18
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range_switching_error: 19
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res_heat_range: 1
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res_heat_val: 46
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float mode
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tfine: 104906.162500
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temp: 20.489485 degC
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press: 100089.609193 Pa
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humidity: 64.456540 % RH
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gas resistance: 12100.310308 Ohm
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== for heater target=300.0 and ambient temp=19.0 (degC)
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=== gas_valid_r: 1
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=== heat_stab_r: 1
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```
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## i2c demo
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```
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par_t1: 26125
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par_t2: 26370
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par_t3: 3
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par_p1: 36262
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par_p2: -10371
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par_p3: 88
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par_p4: 6713
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par_p5: -103
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par_p6: 30
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par_p7: 31
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par_p8: -251
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par_p9: -3158
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par_p10: 30
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par_h1: 776
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par_h2: 1010
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par_h3: 0
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par_h4: 45
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par_h5: 20
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par_h6: 120
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par_h7: -100
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par_g1: 183
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par_g2: 59281
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par_g3: 18
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range_switching_error: 19
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res_heat_range: 1
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res_heat_val: 39
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float mode
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tfine: 97289.819111
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temp: 19.001918 degC
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press: 100226.479673 Pa
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humidity: 67.022216 % RH
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gas resistance: 14702.868852 Ohm
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== for heater target=300.0 and ambient temp=19.0 (degC)
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=== gas_valid_r: 1
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=== heat_stab_r: 1
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```
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Note: Two different BME680 devices, one on each type of bus. Perhaps they'd read closer to eachother following a burn-in or something.
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