Error in interfacing BME280 with Beaglebone black wireless

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1

File “Adafruit_BME280_Example.py”, line 3, in
sensor = BME280(t_mode=BME280_OSAMPLE_8, p_mode=BME280_OSAMPLE_8, h_mode=BME280_OSAMPLE_8)
File “/var/lib/cloud9/Adafruit_Python_BME280/Adafruit_BME280.py”, line 136, in init
self._load_calibration()
File “/var/lib/cloud9/Adafruit_Python_BME280/Adafruit_BME280.py”, line 147, in _load_calibration
self.dig_T1 = self._device.readU16LE(BME280_REGISTER_DIG_T1)
File “/usr/local/lib/python2.7/dist-packages/Adafruit_GPIO-1.0.3-py2.7.egg/Adafruit_GPIO/I2C.py”, line 187, in readU16LE
return self.readU16(register, little_endian=True)
File “/usr/local/lib/python2.7/dist-packages/Adafruit_GPIO-1.0.3-py2.7.egg/Adafruit_GPIO/I2C.py”, line 166, in readU16
result = self._bus.read_word_data(self._address,register) & 0xFFFF
File “/usr/local/lib/python2.7/dist-packages/Adafruit_PureIO-0.2.3-py2.7.egg/Adafruit_PureIO/smbus.py”, line 187, in read_word_data
ioctl(self._device.fileno(), I2C_RDWR, request)
IOError: [Errno 16] Device or resource busy

i getting this error try to find option but not working please help me…

2

I just used BME280 with BB black with a c written example based on their drivers: https://github.com/BoschSensortec/BME280_driver

and it worked no issue. Can u confirm which I2C line you are connected to? run i2cdetect -l to get enabled i2c lines and i2cdetect -y -r <i2c_number> to get of list of device addresses. I think mine was on 0x76 i2c-2. check for yours and make sure it is not showing as “U” which would explain why you are getting resources busy (either that or your device is not connected properly)

3

debian@beaglebone:/var/lib/cloud9$ i2cdetect -y -r 2
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: – -- – -- – -- – -- – -- – -- –
10: – -- – -- – -- – -- – -- – -- – -- – --
20: – -- – -- – -- – -- – -- – -- – -- – --
30: – -- – -- – -- – -- – -- – -- – -- – --
40: – -- – -- – -- – -- – -- – -- – -- – --
50: – -- – -- UU UU UU UU – -- – -- – -- – --
60: – -- – -- – -- – -- – -- – -- – -- – --
70: – -- – -- – -- – 77

i got this result what does it mean?

4

It means that if ur sensor is connected to i2c-2 then your address is prob 0x77. Are you sure you are using correct address?

5

so now how to use that C code which you provided in link.
sorry for trouble but i am very new to this things that’s why don’t know how to run.

6

Clone the following into your BB and change the values in there accordingly (which i2c line, which device address…) and compile it and run it from user space:

https://github.com/BoschSensortec/BME280_driver/blob/master/examples/linux_userspace.c