smbus

library1.1.post2pypypi✓ verified 84d ago

Python bindings for Linux SMBus access through i2c-dev. Current version 1.1.post2. Minimal maintenance, not actively developed.

devops http-networking

pip install smbus

package ↗homepage ↗

INSTALL

IMPORT

SIG · SMBUS

smbus

devopspythonv1.1.post2

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

SMBus

✓ from smbus import SMBus

✗ import smbus; bus = smbus.SMBus(1)

Direct import is preferred but old style still works. However, using from smbus import SMBus is more explicit.

Open I2C bus 1, read one byte from register 0x00 of device at address 0x48.

from smbus import SMBus bus = SMBus(1) # /dev/i2c-1 address = 0x48 data = bus.read_byte_data(address, 0x00) print(f"Read: {data}") bus.close()

Debug

Known issues

gotchasmbus requires root/sudo access to /dev/i2c-* devices. Running without privileges causes PermissionError.

fix

Run script with sudo or add user to i2c group: sudo usermod -aG i2c $USER

affects: all

gotchasmbus is Python 2 only in older versions; version 1.1.post2 supports Python 3 but check system Python version.

fix

Use smbus >=1.1 for Python 3 support, or install smbus-cffi as alternative.

affects: <1.1

deprecatedsmbus package is largely unmaintained; consider migrating to smbus2 or smbus-cffi for active support and Python 3 compatibility.

fix

Replace import with smbus2 (from smbus2 import SMBus) for nearly identical API.

affects: all

Errors

Common errors & fixes

ModuleNotFoundError: No module named 'smbus'

smbus package not installed.

fix

pip install smbus

PermissionError: [Errno 13] Permission denied: '/dev/i2c-1'

User does not have access to I2C bus.

fix

Run script with sudo or add user to i2c group.

FileNotFoundError: [Errno 2] No such file or directory: '/dev/i2c-1'

I2C device not enabled or incorrect bus number.

fix

Enable I2C via raspi-config or check bus number with i2cdetect -l.

Upgrade

Version history

1.1.post2latest on PyPI · released Mar 8, 2019

Audit

Dependencies

No dependency data recorded yet.

Agent activity

9 hits · last 30 days

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OpenAI (training)

Resources

packagehttps://pypi.org/project/smbus/ ↗

homepagehttps://i2c.wiki.kernel.org/index.php/I2C_Tools ↗