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About wenwenchen
since
05-12-2020
12-02-2020
wenwenchen
Member
7
Posts
1
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2
Solutions
12-02-2020
09:17 AM
Actually, I need the bme680 also work with c code, because our code is written in c and it still does not work! Pls contact me via email/skype/teams (wenwen.chen@de.bosch.com) for a bug session.
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10-05-2020
04:25 PM
1 Like
Hi, you do not need to use i2c multiplexer, BME680 is able to be addressed by two i2c addresse, see https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bme680-ds001.pdf section 6.1 Interface selection. To configure i2c addresse, you can use the macro from BME680_driver: https://github.com/BoschSensortec/BME680_driver/blob/master/bme680_defs.h#L104-L105. Additionally, using TCA9548A, the i2c address will keep the same.
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09-30-2020
11:13 AM
I spend another day to debug and find out the problem: After soft resetting, I am not able to set value to any register. I checked with osciloscope, the I2c communication looks good and there is no error reported by i2c driver. Here some more logs: w: 0xe0: 0xb6
r: 0xe0: 0x0
r: 0xd0: 0x61
r: 0x89: 0x0 0xd2 0x66 0x3 0x30 0x7a 0x8d 0x70 0xd7 0x58 0x0 0x1c 0x23
0x67 0xff 0x29 0x1e 0x0 0x0 0xd 0xf6 0xb2 0xf5 0x1e 0x9b
r: 0xe1: 0x41 0x57 0x24 0x0 0x2d 0x14 0x78 0x9c 0x1d 0x66 0x3d 0xe2 0xdf
0x12 0x16 0x0
r: 0x2: 0x16
r: 0x0: 0x20
r: 0x4: 0x23
set sensor_mode
r: 0x74: 0x0
r: 0x74: 0x0
set settings
w: 0x74: 0x0
r: 0x74: 0x0
r: 0x72: 0x0
w: 0x72: 0x2
r: 0x72: 0x0
r: 0x75: 0x0
r: 0x74: 0x0
r: 0x72: 0x0
r: 0x71: 0x0
w: 0x75: 0x8
r: 0x75: 0x0
w: 0x74: 0x8c
r: 0x74: 0x0
w: 0x72: 0x2
r: 0x72: 0x0
w: 0x71: 0x10
r: 0x71: 0x0
r: 0x70: 0x0 0x0 0x0 0x0 0x0 0x0
r: 0x5a: 0x0
r: 0x64: 0x0
set settings again
w: 0x74: 0x0
r: 0x74: 0x0
r: 0x72: 0x0
w: 0x72: 0x2
r: 0x72: 0x0
w: 0x5a: 0x79
r: 0x5a: 0x0
w: 0x64: 0x65
r: 0x64: 0x0
r: 0x74: 0x0
r: 0x75: 0x0
r: 0x74: 0x0
r: 0x72: 0x0
r: 0x71: 0x0
w: 0x75: 0x0
r: 0x75: 0x0
w: 0x74: 0x0
r: 0x74: 0x0
w: 0x72: 0x0
r: 0x72: 0x0
w: 0x71: 0x0
r: 0x71: 0x0
r: 0x70: 0x0 0x0 0x0 0x0 0x0 0x0
r: 0x5a: 0x0
r: 0x64: 0x0
set sensor_mode
r: 0x74: 0x0
w: 0x74: 0x1
r: 0x74: 0x0
r: 0x74: 0x0 The bme680 python library https://github.com/pimoroni/bme680-python works direcly on my raspberry. But I can not understand, why the c code not.
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09-25-2020
05:12 PM
Hi, I tested the sensor with esp32 using the simily code like https://github.com/BoschSensortec/BME680_driver/blob/master/Self%20test/bme680_selftest.c, it works perfectly, then I used the (almost) same code running on raspberry, unfortunetely, it does not work properly. Did you test the sensor with a raspberry using I2c? If not, can you please test it? Here some debug output of my test setup: first: get dur delay 183 ms get data read from pid 5 r: 1d:0080008000800800004 read from pid 5 r: 1d:0080008000800800004 read from pid 5 r: 1d:0080008000800800004 read from pid 5 r: 1d:0080008000800800004 read from pid 5 r: 1d:0080008000800800004 read from pid 5 r: 1d:0080008000800800004 read from pid 5 r: 1d:0080008000800800004 read from pid 5 r: 1d:0080008000800800004 read from pid 5 r: 1d:0080008000800800004 read from pid 5 r: 1d:0080008000800800004 Error [2] : Unknown error code T: -5.68 degC, P: 0.06 hPa, H 1993407.88 %rH set sensor_mode read from pid 5 r: 74:0 w: 74:1 w: 74:1 write to from pid 5 second: get dur delay 183 ms get data read from pid 5 r: 1d:005a68807d9ba0445f800088ba read from pid 5 r: 1d:005a68807d9ba0445f800088ba read from pid 5 r: 1d:005a68807d9ba0445f800088ba read from pid 5 r: 1d:005a68807d9ba0445f800088ba read from pid 5 r: 1d:005a68807d9ba0445f800088ba read from pid 5 r: 1d:005a68807d9ba0445f800088ba read from pid 5 r: 1d:005a68807d9ba0445f800088ba read from pid 5 r: 1d:005a68807d9ba0445f800088ba read from pid 5 r: 1d:005a68807d9ba0445f800088ba read from pid 5 r: 1d:005a68807d9ba0445f800088ba Error [2] : Unknown error code T: -5.68 degC, P: 0.07 hPa, H 1993407.88 %rH , G: 92860 ohms set sensor_mode read from pid 5 r: 74:8c w: 74:8d w: 74:8d write to from pid 5 In attachment, you can also find the debug output from my osciloscopy. And what I just wonder, after setting Baudrate to 40000 in raspberry, one of bme680 sensor in our project, it works well, but a second on board not. If you like to know more, you can also write me email to wenwen.chen@de.bosch.com
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05-18-2020
02:42 PM
Is there a function to dump all current BME680 register map? I will be in vocation next two month. I will give you more information in juni.
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