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Fabian Peter Hammerle 6908fb3511 transmit command: configure transceiver after reading from stdin to avoid delay between configuration and transmission, if pipe is slow		3 years ago
.github	2d2c1ebaba added method `.unlock_spi_device` to release the lock manually	3 years ago
cc1101	6908fb3511 transmit command: configure transceiver after reading from stdin to avoid delay between configuration and transmission, if pipe is slow	3 years ago
examples	78da9b6a06 release v2.3.0	3 years ago
tests	283dc66a0d private class _ReceivePacket: rename attribute `data` to `payload` to match argument of `transmit` method	3 years ago
.gitignore	f6fccfd243 pipeline: added pytest-cov	4 years ago
.pylintrc	2bc397185f setup ci pipeline	4 years ago
CHANGELOG.md	6908fb3511 transmit command: configure transceiver after reading from stdin to avoid delay between configuration and transmission, if pipe is slow	3 years ago
COPYING	994a9a5ede added GPLv3+	4 years ago
Pipfile	ebed8f8706 env: add upper version constraint for pytest to keep compatibility with python3.5	3 years ago
Pipfile.lock	ebed8f8706 env: add upper version constraint for pytest to keep compatibility with python3.5	3 years ago
README.md	9d34140b5b added command `cc1101-transmit` to transmit via command-line interface	3 years ago
mypy.ini	991cc935f0 mypy: ignore missing imports	4 years ago
setup.py	9d34140b5b added command `cc1101-transmit` to transmit via command-line interface	3 years ago

python-cc1101

Python Library & Command Line Tool to Transmit RF Signals via CC1101 Transceivers

Setup

$ pip3 install --user --upgrade cc1101

On Raspbian / Raspberry Pi OS, dependencies can optionally be installed via:

$ sudo apt-get install --no-install-recommends python3-spidev

Wiring Raspberry Pi

Connect the following pins directly:

C1101	Raspberry Pi
VDD	3.3V (Pin 1 or 17)
SI	MOSI (Pin 19)
SO	MISO (Pin 21)
CSn	CE0 (Pin 24)
SCLK	SCLK (Pin 23)
GND	Ground

If these pins are already in use, select a different SPI bus or chip select: https://www.raspberrypi.org/documentation/hardware/raspberrypi/spi/README.md (permalink)

No resistors required. GDO0 & GDO2 are currently unused.

Raspberry Pi GPIO docs: https://www.raspberrypi.org/documentation/usage/gpio/

Usage

Library

See examples.

import cc1101

with cc1101.CC1101() as transceiver:
    transceiver.set_base_frequency_hertz(433.92e6)
    print(transceiver)
    transceiver.transmit(b"\x01\xff\x00 message")

In case CC1101 is connected to a different SPI bus or chip select line than /dev/spidev0.0, use CC1101(spi_bus=?, spi_chip_select=?).

Command Line

$ printf '\x01\x02\x03' | cc1101-transmit -f 433920000 -r 1000

See cc1101-transmit --help.

Troubleshooting

In case a PermissionError gets raised, check the permissions of /dev/spidev*. You'll probably need sudo usermod -a -G spi $USER, followed by a re-login.

Consult CC1101's offical docs for an in-depth explanation of all options: https://www.ti.com/lit/ds/symlink/cc1101.pdf