an integer is required

[watakandai]

Although I followed the tutorial and ran the example script
I got an error.
I also activated I2C, but don't know why it is not working.

import time
import board
import busio
import adafruit_vcnl4040

i2c = busio.I2C(board.SCL, board.SDA)
sensor = adafruit_vcnl4040.VCNL4040(i2c)

while True:
    print("Proximity:", sensor.proximity)
    print("Light: %d lux"% sensor.lux)
    time.sleep(1.0)

Traceback (most recent call last):
  File "07_read_vcnl4040.py", line 8, in <module>
    sensor = adafruit_vcnl4040.VCNL4040(i2c)
  File "/usr/local/lib/python3.7/dist-packages/adafruit_vcnl4040.py", line 308, in __init__
    if self._device_id != 0x186:
  File "/usr/local/lib/python3.7/dist-packages/adafruit_register/i2c_struct.py", line 87, in __get__
    out_end=1, in_start=1, stop=False)
  File "/usr/local/lib/python3.7/dist-packages/adafruit_bus_device/i2c_device.py", line 136, in write_then_readinto
    in_start=in_start, in_end=in_end)
  File "/usr/local/lib/python3.7/dist-packages/busio.py", line 91, in writeto_then_readfrom
    in_start=in_start, in_end=in_end, stop=stop)
  File "/usr/local/lib/python3.7/dist-packages/adafruit_blinka/microcontroller/generic_linux/i2c.py", line 61, in writeto_then_readfrom
    readin = self._i2c_bus.read_i2c_block_data(address, buffer_out[out_start:out_end], in_end-in_start)
  File "/home/pi/.local/lib/python3.7/site-packages/Adafruit_PureIO/smbus.py", line 207, in read_i2c_block_data
    reg = c_uint8(cmd)
TypeError: an integer is required (got type bytearray)

[ladyada]

what board are you using?

[watakandai]

A Raspberry Pi 3

[caternuson]

related?
adafruit/Adafruit_CircuitPython_ADS1x15#48

[caternuson]

@watakandai Can you recreate the issue if you start with a fresh OS install? Or a venv if you're familiar with that. See thread linked above. This seems like something potentially related to some kind of software conflict.

[watakandai]

I think the issue is related to the one you posted.
Similar to the thread, the OS is the latest Raspbian and I also added few libraries.
I could try to indtsll a fresh OS today and see what would happen.

Or maybe it is due to the updates on smbus or busio, but not sure.

[watakandai]

With a freshly installed OS (Raspbian 4.19.75-v7), it worked perfectly.
Even if I installed pyqt5 sudo apt-get install python3-pyqt5, it worked.

[caternuson]

OK, let's close this for now. The person in the other issue was also able to get around this with a fresh OS install. If you run into this again and can narrow it down to a specific package install or something, please let us know and we can reopen the issue.

Thanks for testing with a fresh OS image.

[ladyada]

@caternuson i think this is from old libraries, maybe we should tell em to do a full pip update:

https://stackoverflow.com/questions/2720014/how-to-upgrade-all-python-packages-with-pip

[caternuson]

@watakandai Do you still have your non-working setup? If so, can you try the above and see if that gets it back to working?

[watakandai]

Hi @caternuson, I still do. I will try the above method and let you know what will happen.

[ladyada]

please do it as a user and also after sudo bash as root

[watakandai]

It worked using

pip freeze --local | grep -v '^\-e' | cut -d = -f 1  | xargs -n1 pip install -U

Thank you so much @caternuson and @ladyada

[Grandpa-G]

I did this also on my Raspberry and will post the results in the other issue. It worked.

[lemonkey]

A similar error happened with my si7021 temperature/humidity board (on a fresh Raspbian Buster install, after running sudo pip3 install adafruit-circuitpython-si7021).

It turned out that somehow I had an older version of Adafruit-PureIO installed (0.2.3) instead of the latest as of this comment (1.0.4).

After a pip install -U Adafruit-PureIO, I was able to run the sample code without errors:

import time
import board
import busio
import adafruit_si7021

# Create library object using our Bus I2C port
i2c = busio.I2C(board.SCL, board.SDA)
sensor = adafruit_si7021.SI7021(i2c)

while True:
    print("\nTemperature: %0.1f C" % sensor.temperature)
    print("Humidity: %0.1f %%" % sensor.relative_humidity)
    time.sleep(2)