MicroPython Forum (Archive)

Posted: **Tue Nov 12, 2019 2:16 pm**

hello,
i try read a bmp180 , i downloaded bmp180.py

from bmp180 import BMP180
from machine import I2C, Pin                        
bus =  I2C(scl=Pin(4), sda=Pin(5), freq=100000)

with i2c.scan() = [118]
i have changed , in bmp180.py ,

_bmp_addr = 119

by

_bmp_addr = 118

but

bmp180 = BMP180(bus)

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "bmp180.py", line 22, in __init__
OSError: [Errno 19] ENODEV

I do not understand why
can you help please

Posted: **Tue Nov 12, 2019 2:21 pm**

I looks like your BMP180 is not connected properly, check the wiring.

Posted: **Tue Nov 12, 2019 2:25 pm**

i think of yes , because with i2c.scan() = 118

Posted: **Tue Nov 12, 2019 2:41 pm**

I think
I2C(scl=Pin(4), sda=Pin(5), freq=100000)

should be
I2C(scl=Pin(5), sda=Pin(4), freq=100000)

Garry

Posted: **Tue Nov 12, 2019 2:51 pm**

ok i put I2C(scl=Pin(5), sda=Pin(4), freq=100000)

same error

Posted: **Tue Nov 12, 2019 3:02 pm**

it's ok , i download for bme280 :

https://github.com/catdog2/mpy_bme280_esp8266

it's good
thank you

bmp180