README

README.md

@@ -1,38 +1,21 @@
 # bme680
 
-Example implementation, just lacking proven SPI connectivity for now.
+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](.gitea/pi.png)
+
+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
 ```
-i2c_init
-i2c_read: D0 (1) [61]
-i2c_write: E0 [B6]
-i2c_read: E9 (2) [5B, 66]
-i2c_read: 8A (2) [97, 67]
-i2c_read: 8C (1) [03]
-i2c_read: 8E (2) [C0, 88]
-i2c_read: 90 (2) [D4, D7]
-i2c_read: 92 (1) [58]
-i2c_read: 94 (2) [DC, 25]
-i2c_read: 96 (2) [36, FF]
-i2c_read: 99 (1) [1E]
-i2c_read: 98 (1) [18]
-i2c_read: 9C (1) [FC]
-i2c_read: 9E (2) [73, F2]
-i2c_read: A0 (1) [1E]
-i2c_read: E2 (2) [FA, 31]
-i2c_read: E1 (2) [3E, FA]
-i2c_read: E4 (1) [00]
-i2c_read: E5 (1) [2D]
-i2c_read: E6 (1) [14]
-i2c_read: E7 (1) [78]
-i2c_read: E8 (1) [9C]
-i2c_read: ED (1) [D0]
-i2c_read: EB (2) [85, E9]
-i2c_read: EE (1) [12]
-i2c_read: 04 (1) [13]
-i2c_read: 02 (1) [16]
-i2c_read: 00 (1) [2E]
 par_t1: 26203
 par_t2: 26519
 par_t3: 3
@@ -59,98 +42,51 @@ par_g3: 18
 range_switching_error: 19
 res_heat_range: 1
 res_heat_val: 46
-i2c_write: 74 [B4]
-i2c_write: 72 [04]
-i2c_write: 75 [1C]
-i2c_write: 6D [BC]
-i2c_write: 63 [E7]
-i2c_write: 59 [28]
-i2c_write: 6C [BC]
-i2c_write: 62 [E7]
-i2c_write: 58 [28]
-i2c_write: 6B [BC]
-i2c_write: 61 [E7]
-i2c_write: 57 [28]
-i2c_write: 6A [BC]
-i2c_write: 60 [E7]
-i2c_write: 56 [28]
-i2c_write: 69 [BC]
-i2c_write: 5F [E7]
-i2c_write: 55 [28]
-i2c_write: 68 [BC]
-i2c_write: 5E [E7]
-i2c_write: 54 [28]
-i2c_write: 67 [BC]
-i2c_write: 5D [E7]
-i2c_write: 53 [28]
-i2c_write: 66 [BC]
-i2c_write: 5C [E7]
-i2c_write: 52 [28]
-i2c_write: 65 [BC]
-i2c_write: 5B [E7]
-i2c_write: 51 [28]
-i2c_write: 64 [BC]
-i2c_write: 5A [E7]
-i2c_write: 50 [28]
-i2c_write: 71 [10]
-i2c_write: 70 [00]
-i2c_write: 74 [B5]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-...many identical lines omitted...
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [20]
-i2c_read: 1D (1) [80]
-i2c_read: 22 (3) [75, 3D, D0]
-i2c_read: 1F (3) [55, 22, 30]
-i2c_read: 25 (2) [63, 2E]
-i2c_read: 2A (2) [00, 28]
-i2c_read: 2B (1) [28]
 float mode
-tfine: 98700.755011
+tfine: 104478.758986
-temp: 19.277491 degC
+temp: 20.406008 degC
-press: 96363.204250 Pa
+press: 99649.423644 Pa
-humidity: 68.749455 % RH
+humidity: 65.368724 % RH
-gas resistance: 48633.411307 Ohm
+gas resistance: 10989.279979 Ohm
-== for heater target=320.0 and ambient temp=25.0 (degC)
+== for heater target=300.0 and ambient temp=19.0 (degC)
-i2c_deinit
 ```
-Low air pressure due to storm not bad sensor
+
+## 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.