merbanan
Support for wireless freezer refrigerator thermometer model "WA150KM"
Hello everyone,
I recently got a 433MHz freezer/refrigerator thermometer from Amazon branded as "ORIA" with model name "WA150KM" and tried to read it with rtl_433. Unfortunately it's an unknown device still.
The transmitter is labeled with FCC ID "2AZUG-WA144" which has some FCC data, but nothing regarding the encoding.
I captured samples and tabled the temperature readings on the headunit, but I'm struggling with the analysis.
I analyzed the samples with rtl_433 -A sample.cu8 and it came up with a rather consistent flex decoder config
-X 'n=name,m=OOK_PWM,s=488,l=976,r=3948,g=0,t=0,y=304', which I modified to
-X 'n=WA144,m=OOK_PWM,s=488,l=976,r=8000,g=0,t=0,y=304' to keep the preamble in the message payload, but I'm unable to read anything out of the codes. I'm not even sure if the flex decoder config is right - still a newbie regarding this stuff unfortunately.
Capture log (HW: Nooelec RTL-SDR v5 SDR without antenna, receiver about 5cm away):
> rtl_433 -S unknown
rtl_433 version 24.10 (2024-10-30) inputs file rtl_tcp RTL-SDR with TLS
Found Rafael Micro R820T tuner
[SDR] Using device 0: Realtek, RTL2838UHIDIR, SN: 00000001, "Generic RTL2832U OEM"
Exact sample rate is: 250000.000414 Hz
[R82XX] PLL not locked!
*** Saving signal to file g001_433.92M_250k.cu8 (128385 samples, 262144 bytes)
*** Saving signal to file g002_433.92M_250k.cu8 (128385 samples, 262144 bytes)
*** Saving signal to file g003_433.92M_250k.cu8 (128400 samples, 262144 bytes)
[...]
WA144_Samples.zip Sample_Values.csv
Can anyone give me a hint on how to proceed here?
Thanks a lot!
Jan Niklaas
Samples look great, it's OOK, a warmup of ~10x 490 µs pulse / 2932 µs gap, then three packets with a 2980 µs packet gap of 24x preamble 490 / 490 µs, then 490 µs Manchester code. I.e.
-X 'n=name,m=OOK_PCM,s=490,l=490,g=1500,r=4000' for raw data and
-X 'n=name,m=OOK_MC_ZEROBIT,s=490,l=490,g=1500,r=4000' for Manchester decoded data.
But that won't work well, -X 'n=name,m=OOK_MC_ZEROBIT,s=490,l=490,r=1500' is somewhat better.
Use this collected PCM data
{227}aaaaaaaaaaaa66aa5665a655595a59966565559555665599a5a699690[g001]
{227}aaaaaaaaaaaa66aa6665a655595a5996656555955566659999a699690
{227}aaaaaaaaaaaa66aa6665a655595a5996656555955566659999a69969
{227}aaaaaaaaaaaa66aa5565a655595a59966565559555665659a66699690[g002]
{227}aaaaaaaaaaaa66aa6565a655595a599665655595556666599a6699690
{227}aaaaaaaaaaaa66aa6565a655595a599665655595556666599a669969
{227}aaaaaaaaaaaa66aa5665a655595a5955a565559555665659555699690[g003]
{227}aaaaaaaaaaaa66aa6665a655595a5955a565559555666659695699690
{227}aaaaaaaaaaaa66aa6665a655595a5955a56555955566665969569969
{227}aaaaaaaaaaaa66aa5565a655595a5965a56555955566655956aa99690[g004]
{227}aaaaaaaaaaaa66aa6565a655595a5965a5655595556659596aaa99690
{227}aaaaaaaaaaaa66aa6565a655595a5965a5655595556659596aaa9969
{227}aaaaaaaaaaaa66aa5665a655595a5999a565559555669a5955a999690[g005]
{227}aaaaaaaaaaaa66aa6665a655595a5999a56555955566aa5969a999690
{227}aaaaaaaaaaaa66aa6665a655595a5999a56555955566aa5969a99969
{227}aaaaaaaaaaaa66aa5565a655595a59555965559555669559959599690[g006]
{227}aaaaaaaaaaaa66aa6565a655595a5955596555955566a559a99599690
{227}aaaaaaaaaaaa66aa6565a655595a5955596555955566a559a9959969
{227}aaaaaaaaaaaa66aa5665a655595a59595965559555669a59965a99690[g007]
{227}aaaaaaaaaaaa66aa6665a655595a5959596555955566aa59aa5a99690
{227}aaaaaaaaaaaa66aa6665a655595a5959596555955566aa59aa5a9969
{227}aaaaaaaaaaaa66aa5565a655595a59965965559555666659956699690[g008]
{227}aaaaaaaaaaaa66aa6565a655595a59965965559555665a59a96699690
{227}aaaaaaaaaaaa66aa6565a655595a59965965559555665a59a9669969
{227}aaaaaaaaaaaa66aa5665a655595a59a59965559555669a59669a99690[g009]
{227}aaaaaaaaaaaa66aa6665a655595a59a5996555955566aa595a9a99690
{227}aaaaaaaaaaaa66aa6665a655595a59a5996555955566aa595a9a9969
{227}aaaaaaaaaaaa66aa5565a655595a59a99965559555669659655599690[g010]
{227}aaaaaaaaaaaa66aa6565a655595a59a9996555955566a659595599690
{227}aaaaaaaaaaaa66aa6565a655595a59a9996555955566a65959559969
{227}aaaaaaaaaaaa66aa5665a655595a5955696555955566a659aa5599690[g011]
{227}aaaaaaaaaaaa66aa6665a655595a59556965559555669a59965599690
{227}aaaaaaaaaaaa66aa6665a655595a59556965559555669a5996559969
{227}aaaaaaaaaaaa66aa5565a655595a59a56965559555666959a95999690[g012]
{227}aaaaaaaaaaaa66aa6565a655595a59a56965559555665659955999690
{227}aaaaaaaaaaaa66aa6565a655595a59a5696555955566565995599969
{227}aaaaaaaaaaaa66aa5665a655595a59696965559555669599aa6699690[g013]
{227}aaaaaaaaaaaa66aa6665a655595a5969696555955566a599966699690
{227}aaaaaaaaaaaa66aa6665a655595a5969696555955566a59996669969
{227}aaaaaaaaaaaa66aa5565a655595a5956696555955566a659a99699690[g014]
{227}aaaaaaaaaaaa66aa6565a655595a59566965559555669a59959699690
{227}aaaaaaaaaaaa66aa6565a655595a59566965559555669a5995969969
{227}aaaaaaaaaaaa66aa5665a655595a5995a965559555669a595aa699690[g015]
{227}aaaaaaaaaaaa66aa6665a655595a5995a96555955566aa5966a699690
{227}aaaaaaaaaaaa66aa6665a655595a5995a96555955566aa5966a69969
{227}aaaaaaaaaaaa66aa5565a655595a59a5a96555955566a959595a99690[g016]
{227}aaaaaaaaaaaa66aa6565a655595a59a5a965559555669659655a99690
{227}aaaaaaaaaaaa66aa6565a655595a59a5a965559555669659655a9969
{227}aaaaaaaaaaaa66aa5665a655595a5999a9655595556695995aa999690[g017]
{227}aaaaaaaaaaaa66aa6665a655595a5999a96555955566a59966a999690
{227}aaaaaaaaaaaa66aa6665a655595a5999a96555955566a59966a99969
{227}aaaaaaaaaaaa66aa5565a655595a59a9a96555955566a659595599690[g018]
{227}aaaaaaaaaaaa66aa6565a655595a59a9a965559555669a59655599690
{227}aaaaaaaaaaaa66aa6565a655595a59a9a965559555669a5965559969
{227}aaaaaaaaaaaa66aa5665a655595a5996a9655595556699995aa599690[g019]
{227}aaaaaaaaaaaa66aa6665a655595a5996a96555955566a99966a599690
{227}aaaaaaaaaaaa66aa6665a655595a5996a96555955566a99966a59969
{227}aaaaaaaaaaaa66aa5565a655595a5995566555955566695999a599690[g020]
{227}aaaaaaaaaaaa66aa6565a655595a59955665559555665659a5a599690
{227}aaaaaaaaaaaa66aa6565a655595a59955665559555665659a5a59969
{227}aaaaaaaaaaaa66aa5665a655595a59a556655595556655999a5999690[g021]
{227}aaaaaaaaaaaa66aa6665a655595a59a55665559555666599a65999690
{227}aaaaaaaaaaaa66aa6665a655595a59a55665559555666599a6599969
{227}aaaaaaaaaaaa66aa5565a655595a59a55665559555665659999999690[g022]
{227}aaaaaaaaaaaa66aa6565a655595a59a55665559555666659a59999690
{227}aaaaaaaaaaaa66aa6565a655595a59a55665559555666659a5999969
{227}aaaaaaaaaaaa66aa5665a655595a5965566555955566aa599aa999690[g023]
{227}aaaaaaaaaaaa66aa6665a655595a59655665559555669599a6a999690
{227}aaaaaaaaaaaa66aa6665a655595a59655665559555669599a6a99969
{227}aaaaaaaaaaaa66aa5565a655595a5965566555955566a959996999690[g024]
{227}aaaaaaaaaaaa66aa6565a655595a59655665559555669659a56999690
{227}aaaaaaaaaaaa66aa6565a655595a59655665559555669659a5699969
{227}aaaaaaaaaaaa66aa5665a655595a59955665559555666a599a6599690[g025]
{227}aaaaaaaaaaaa66aa6665a655595a59955665559555665599a66599690
{227}aaaaaaaaaaaa66aa6665a655595a59955665559555665599a6659969
{227}aaaaaaaaaaaa66aa5565a655595a5996a965559555669a59596599690[g026]
{227}aaaaaaaaaaaa66aa6565a655595a5996a96555955566aa59656599690
{227}aaaaaaaaaaaa66aa6565a655595a5996a96555955566aa5965659969
{227}aaaaaaaaaaaa66aa5665a655595a59a9a96555955566a5995a9599690[g027]
{227}aaaaaaaaaaaa66aa6665a655595a59a9a965559555669999669599690
{227}aaaaaaaaaaaa66aa6665a655595a59a9a96555955566999966959969
{227}aaaaaaaaaaaa66aa5565a655595a5999a965559555669659596999690[g028]
{227}aaaaaaaaaaaa66aa6565a655595a5999a96555955566a659656999690
{227}aaaaaaaaaaaa66aa6565a655595a5999a96555955566a65965699969
{227}aaaaaaaaaaaa66aa5665a655595a5959a9655595556655995a5999690[g029]
{227}aaaaaaaaaaaa66aa6665a655595a5959a965559555666599665999690
{227}aaaaaaaaaaaa66aa6665a655595a5959a96555955566659966599969
{227}aaaaaaaaaaaa66aa5565a655595a59a5a96555955566a959595a99690[g030]
{227}aaaaaaaaaaaa66aa6565a655595a59a5a965559555669659655a99690
{227}aaaaaaaaaaaa66aa6565a655595a59a5a965559555669659655a9969
{227}aaaaaaaaaaaa66aa9665a655595a59a5a965559555665599aa9999690[g031]
{227}aaaaaaaaaaaa66aaa665a655595a59a5a965559555666599969999690
{227}aaaaaaaaaaaa66aaa665a655595a59a5a96555955566659996999969
{227}aaaaaaaaaaaa66aa5565a655595a5995a965559555669959596699690[g032]
{227}aaaaaaaaaaaa66aa6565a655595a5995a96555955566a959656699690
{227}aaaaaaaaaaaa66aa6565a655595a5995a96555955566a95965669969
{227}aaaaaaaaaaaa66aa9665a655595a5995a965559555666a59aaa599690[g033]
{227}aaaaaaaaaaaa66aaa665a655595a5995a96555955566559996a599690
{227}aaaaaaaaaaaa66aaa665a655595a5995a96555955566559996a59969
{227}aaaaaaaaaaaa66aa5565a655595a59966965559555665a59a96699690[g034]
{227}aaaaaaaaaaaa66aa6565a655595a59966965559555666a59956699690
{227}aaaaaaaaaaaa66aa6565a655595a59966965559555666a5995669969
{227}aaaaaaaaaaaa66aa9665a655595a599669655595556699995aa599690[g035]
{227}aaaaaaaaaaaa66aaa665a655595a5996696555955566a99966a599690
{227}aaaaaaaaaaaa66aaa665a655595a5996696555955566a99966a59969
{227}aaaaaaaaaaaa66aa5565a655595a5956696555955566a659a99699690[g036]
{227}aaaaaaaaaaaa66aa6565a655595a59566965559555669a59959699690
{227}aaaaaaaaaaaa66aa6565a655595a59566965559555669a5995969969
And paste it in a BitBench with decoding set to Manchester.
There is a nibble sum, then another checksum byte and a fixe 0xa6 value at the end. The temperature is a field in the middle, values are bit-reflected. See this BitBench.
Wow, you literally decoded this in half an hour! I'll try to understand that and capture some more samples to come up with explanations for the rest of the data.
Thanks so much! Jan Niklaas
@janiwe I took a stab at a flex decoder in case this helps you gather data. There's no direct flex support for the LSB BCD values in this signal, but I put in a brief lookup table to get a few integer values.
# WA150KM Thermometer
# https://github.com/merbanan/rtl_433/issues/3136
decoder {
name = 2AZUG-WA144_Thermometer,
modulation = OOK_PCM,
short = 488,
long = 488,
reset = 1500,
preamble = {32}aaaa66aa,
symbol_zero = {2}4,
symbol_one = {2}8,
get = unknown:@0:{8}:%02x,
get = temp_bcd_lsb:@24:{16}:%04x,
get = temp_c:@32:{8}:[68:22 196:23 36:24 164:25 100:26 228:27 20:28],
get = sum:@56:{8}:%02x,
get = chk:@64:{8}:%02x,
}
Hi, I was able to collect some more samples and identified a few more fields in the data: Bitbench
Some observations:
- In normal operation, the MSG_TYPE toggles between fa20 and fa28 with every send (interval is ~34 seconds)
- Forced transmissions with the TX button have a MSG_TYPE=fa21
- DEVICE_IDs stay consistent over powercycles
- The devices transmit a "battery low" signal encoded in the byte after the temperature
- Negative temperatures have another single bit set
Best Jan Niklaas
Hi, I spent some time writing a basic decoder. It does not respect the battery low signals or message types, but it seems to work and put out correct temperature readings. See above PRs, would you have a look and consider a merge? Cheers, Jan Niklaas
@janiwe Is there anything useful in this issue that is not in the PRs? (I would be in favor of comments in the code to be merged, to have comments with all useful knowledge, since i like to get issues closed to avoid cognitive overload.)
Maybe you could see about that, and rebase to current master, and poke reviewers.
@gdt Done and done, I added the collected knowledge from this issue as comment in the devices c file.
What would I need to do to test this? I have a "KeeKit Fridge Thermometer", same FCC ID, it looks identical.
I'm probably doing something wrong, but I can't get it to decode.
Hi @AJolly , I did a review of the code of @janiwe , the data layout based on your samples and from @janiwe samples too.
I'm able to identify the check, it's 16 bit XOR, the last byte 0x65 is not taken into account and can be ignored.
@AJolly , based on your samples, the temp was 26.4 °C, 27.1 °C and 27.2 °C , is it correct ?
The bitbench from few samples
Notice that it's after MC decoded, I removed the preamble/syncword from the data it was 0xffffff5f to keep only usefull information.
Took me forever to figure out how to get this compiled and running under home assistant, but it does seem to work correctly. The oen change I'd make is changing temperature to temperature_C so it's properly parsed from rtl_433 MQTT auto discovery.
I've noticed that it will occasionally decode to a wildly wrong number (green/blue lines are using the wa150km sensors) Unsure if we are ignoring the checksum, or whats the best way to log everything to better troubleshoot this?
You need to log all messages and their decode values until we find the bad decodes. Then we might be able to filter it out. But right now it does not seem to have a checksum. We need messages to figure that out.
Is that the -F logging or -S known or something else? I'm happy to run the logging, but im not quite sure which option to use. Is there an signal save option for a specific decoder?
We need the bitstream of the messages that deviates. Either the sensor is buggy or we need to filter messages better.
in 02/2025 i made a private decoder for all the new Oregon clones based on -R12
Codename ist Oregon-v3 it handles all the yet known clones PLUS Oria !
the new Oria-WA15KM is one of this clones ,without Humidity! SID, ID, Channel, Battery, Test, and ofc. CHS works. feel free to use the code for improving -R288 as usual under false flag -R1
BIG THX to Bruno, Christian , janiwe, AJolly
have fun.
