Program to decode traffic from Devices that are broadcasting on 433.9 MHz like temperature sensors
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rtl_433 turns your Realtek RTL2832 based DVB dongle into a 433.92MHz generic data receiver



How to add support for unsupported sensors

Read the Test Data section at the bottom.


rtl_433 -h
Usage:	= Tuner options =
	[-d <RTL-SDR USB device index>] (default: 0)
	[-d :<RTL-SDR USB device serial (can be set with rtl_eeprom -s)>]
	[-g <gain>] (default: 0 for auto)
	[-f <frequency>] [-f...] Receive frequency(s) (default: 433920000 Hz)
	[-H <seconds>] Hop interval for polling of multiple frequencies (default: 600 seconds)
	[-p <ppm_error] Correct rtl-sdr tuner frequency offset error (default: 0)
	[-s <sample rate>] Set sample rate (default: 250000 Hz)
	= Demodulator options =
	[-R <device>] Enable only the specified device decoding protocol (can be used multiple times)
	[-G] Enable all device protocols, included those disabled by default
	[-X <spec> | help] Add a general purpose decoder (-R 0 to disable all other decoders)
	[-l <level>] Change detection level used to determine pulses [0-16384] (0 = auto) (default: 0)
	[-z <value>] Override short value in data decoder
	[-x <value>] Override long value in data decoder
	[-n <value>] Specify number of samples to take (each sample is 2 bytes: 1 each of I & Q)
	= Analyze/Debug options =
	[-a] Analyze mode. Print a textual description of the signal. Disables decoding
	[-A] Pulse Analyzer. Enable pulse analysis and decode attempt
	[-I] Include only: 0 = all (default), 1 = unknown devices, 2 = known devices
	[-D] Print debug info on event (repeat for more info)
	[-q] Quiet mode, suppress non-data messages
	[-y <code>] Verify decoding of demodulated test data (e.g. "{25}fb2dd58") with enabled devices
	= File I/O options =
	[-t] Test signal auto save. Use it together with analyze mode (-a -t). Creates one file per signal
		 Note: Saves raw I/Q samples (uint8 pcm, 2 channel). Preferred mode for generating test files
	[-r <filename>] Read data from input file instead of a receiver
	[-w <filename>] Save data stream to output file (a '-' dumps samples to stdout)
	[-W <filename>] Save data stream to output file, overwrite existing file
	[-F] kv|json|csv|syslog Produce decoded output in given format. Not yet supported by all drivers.
		 Append output to file with :<filename> (e.g. -F csv:log.csv), defaults to stdout.
		 Specify host/port for syslog with e.g. -F syslog:
	[-C] native|si|customary Convert units in decoded output.
	[-T] Specify number of seconds to run
	[-U] Print timestamps in UTC (this may also be accomplished by invocation with TZ environment variable set).
	[-E] Stop after outputting successful event(s)
	[-V] Output the version string and exit
	[-h] Output this usage help and exit
		 Use -R, -X, -F, -r, or -w without argument for more help

Supported device protocols:
    [01]  Silvercrest Remote Control
    [02]  Rubicson Temperature Sensor
    [03]  Prologue Temperature Sensor
    [04]  Waveman Switch Transmitter
    [05]* Steffen Switch Transmitter
    [06]* ELV EM 1000
    [07]* ELV WS 2000
    [08]  LaCrosse TX Temperature / Humidity Sensor
    [09]* Template decoder
    [10]* Acurite 896 Rain Gauge
    [11]  Acurite 609TXC Temperature and Humidity Sensor
    [12]  Oregon Scientific Weather Sensor
    [13]* Mebus 433
    [14]* Intertechno 433
    [15]  KlikAanKlikUit Wireless Switch
    [16]  AlectoV1 Weather Sensor (Alecto WS3500 WS4500 Ventus W155/W044 Oregon)
    [17]  Cardin S466-TX2
    [18]  Fine Offset Electronics, WH2, WH5, Telldus Temperature/Humidity/Rain Sensor
    [19]  Nexus Temperature & Humidity Sensor
    [20]  Ambient Weather Temperature Sensor
    [21]  Calibeur RF-104 Sensor
    [22]* X10 RF
    [23]  DSC Security Contact
    [24]* Brennenstuhl RCS 2044
    [25]  GT-WT-02 Sensor
    [26]  Danfoss CFR Thermostat
    [27]* Energy Count 3000 (868.3 MHz)
    [28]* Valeo Car Key
    [29]  Chuango Security Technology
    [30]  Generic Remote SC226x EV1527
    [31]  TFA-Twin-Plus-30.3049 and Ea2 BL999
    [32]  Fine Offset Electronics WH1080/WH3080 Weather Station
    [33]  WT450
    [34]  LaCrosse WS-2310 Weather Station
    [35]  Esperanza EWS
    [36]  Efergy e2 classic
    [37]* Inovalley kw9015b, TFA Dostmann 30.3161 (Rain and temperature sensor)
    [38]  Generic temperature sensor 1
    [39]  WG-PB12V1
    [40]  Acurite 592TXR Temp/Humidity, 5n1 Weather Station, 6045 Lightning
    [41]  Acurite 986 Refrigerator / Freezer Thermometer
    [42]  HIDEKI TS04 Temperature, Humidity, Wind and Rain Sensor
    [43]  Watchman Sonic / Apollo Ultrasonic / Beckett Rocket oil tank monitor
    [44]  CurrentCost Current Sensor
    [45]  emonTx OpenEnergyMonitor
    [46]  HT680 Remote control
    [47]  S3318P Temperature & Humidity Sensor
    [48]  Akhan 100F14 remote keyless entry
    [49]  Quhwa
    [50]  OSv1 Temperature Sensor
    [51]  Proove
    [52]  Bresser Thermo-/Hygro-Sensor 3CH
    [53]  Springfield Temperature and Soil Moisture
    [54]  Oregon Scientific SL109H Remote Thermal Hygro Sensor
    [55]  Acurite 606TX Temperature Sensor
    [56]  TFA pool temperature sensor
    [57]  Kedsum Temperature & Humidity Sensor
    [58]  blyss DC5-UK-WH (433.92 MHz)
    [59]  Steelmate TPMS
    [60]  Schrader TPMS
    [61]* LightwaveRF
    [62]  Elro DB286A Doorbell
    [63]  Efergy Optical
    [64]  Honda Car Key
    [65]* Template decoder
    [66]* Template decoder
    [67]  Radiohead ASK
    [68]  Kerui PIR Sensor
    [69]  Fine Offset WH1050 Weather Station
    [70]  Honeywell Door/Window Sensor
    [71]  Maverick ET-732/733 BBQ Sensor
    [72]* RF-tech
    [73]  LaCrosse TX141-Bv2/TX141TH-Bv2 sensor
    [74]  Acurite 00275rm,00276rm Temp/Humidity with optional probe
    [75]  LaCrosse TX35DTH-IT, TFA Dostmann 30.3155 Temperature/Humidity sensor
    [76]  LaCrosse TX29IT Temperature sensor
    [77]  Vaillant calorMatic 340f Central Heating Control
    [78]  Fine Offset Electronics, WH25, WH24, HP1000 Temperature/Humidity/Pressure Sensor
    [79]  Fine Offset Electronics, WH0530 Temperature/Rain Sensor
    [80]  IBIS beacon
    [81]  Oil Ultrasonic STANDARD FSK
    [82]  Citroen TPMS
    [83]  Oil Ultrasonic STANDARD ASK
    [84]  Thermopro TP11 Thermometer
    [85]  Solight TE44
    [86]  Wireless Smoke and Heat Detector GS 558
    [87]  Generic wireless motion sensor
    [88]  Toyota TPMS
    [89]  Ford TPMS
    [90]  Renault TPMS
    [91]* inFactory
    [92]  FT-004-B Temperature Sensor
    [93]  Ford Car Key
    [94]  Philips outdoor temperature sensor
    [95]  Schrader TPMS EG53MA4
    [96]  Nexa
    [97]  Thermopro TP08/TP12 thermometer
    [98]  GE Color Effects
    [99]  X10 Security
    [100]  Interlogix GE UTC Security Devices
    [101]* Dish remote 6.3
    [102]* SimpliSafe Home Security System (May require disabling automatic gain for KeyPad decodes)
    [103]  Sensible Living Mini-Plant Moisture Sensor
    [104]* Wireless M-Bus, Mode C&T, 100kbps (-f 868950000 -s 1200000)
    [105]* Wireless M-Bus, Mode S, 32.768kbps (-f 868300000 -s 1000000)
    [106]* Wireless M-Bus, Mode R, 4.8kbps (-f 868330000)
    [107]* Wireless M-Bus, Mode F, 2.4kbps
    [108]  WS Temperature Sensor
    [109]  WT0124 Pool Thermometer
    [110]  PMV-107J (Toyota) TPMS

* Disabled by default, use -R n or -G


Command Description
rtl_433 -G Default receive mode, attempt to decode all known devices
rtl_433 -p NN -R 1 -R 9 -R 36 -R 40 Typical usage: Enable device decoders for desired devices. Correct rtl-sdr tuning error (ppm offset).
rtl_433 -a Will run in analyze mode and you will get a text description of the received signal.
rtl_433 -A Enable pulse analyzer. Summarizes the timings of pulses, gaps, and periods. Can be used in either the normal decode mode, or analyze mode.
rtl_433 -a -t Will run in analyze mode and save a test file per detected signal (g###_###M_###k.cu8). Format is uint8, 2 channels.
rtl_433 -r file_name Play back a saved data file.
rtl_433 file_name Will save everything received from the rtl-sdr during the session into a single file. The saves file may become quite large depending on how long rtl_433 is left running. Note: saving signals into individual files with rtl_433 -a -t is preferred.
rtl_433 -F json -U | mosquitto_pub -t home/rtl_433 -l Will pipe the output to network as JSON formatted MQTT messages. A test MQTT client can be found in tests/
rtl_433 -f 433535000 -f 434019000 -H 15 Will poll two frequencies with 15 seconds interval.

This software is mostly usable for developers right now.

Supporting Additional Devices and Test Data

Note: Not all device protocol decoders are enabled by default. When testing to see if your device is decoded by rtl_433, use -G to enable all device protocols.

The first step in decoding new devices is to record the signals using -a -t. The signals will be stored individually in files named gNNN_FFFM_RRRk.cu8 that can be played back with rtl_433 -r gNNN_FFFM_RRRk.cu8.

These files are vital for understanding the signal format as well as the message data. Use both analyzers -a and -A to look at the recorded signal and determine the pulse characteristics, e.g. rtl_433 -r gNNN_FFFM_RRRk.cu8 -a -A.

Make sure you have recorded a proper set of test signals representing different conditions together with any and all information about the values that the signal should represent. For example, make a note of what temperature and/or humidity is the signal encoding. Ideally, capture a range of data values, such a different temperatures, to make it easy to spot what part of the message is changing.

Add the data files, a text file describing the captured signals, pictures of the device and/or a link the manufacturer's page (ideally with specifications) to the rtl_433_tests github repository. Follow the existing structure as best as possible and send a pull request.

Please don't open a new github issue for device support or request decoding help from others until you've added test signals and the description to the repository.

The rtl_433_test repository is also used to help test that changes to rtl_433 haven't caused any regressions.

Google Group

Join the Google group, rtl_433, for more information about rtl_433:!forum/rtl_433


If you see this error:

Kernel driver is active, or device is claimed by second instance of librtlsdr.
In the first case, please either detach or blacklist the kernel module
(dvb_usb_rtl28xxu), or enable automatic detaching at compile time.


sudo rmmod dvb_usb_rtl28xxu rtl2832