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merbanan / rtl_433

Program to decode radio transmissions from devices on the ISM bands (and other frequencies)
GNU General Public License v2.0
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GERMA (Chinese) 4-Button Keychain Remote #2925

Closed waltje closed 3 months ago

waltje commented 4 months ago

These are samples recorded for the Germa 4-button keychain remote, as found on AliExpress (https://www.aliexpress.us/item/3256805955378503.html) and Amazon (https://www.amazon.com/Control-Duplicator-Electric-Transmitter-Keychain/dp/B0C6LBCQSY/ref=sr_1_3) for next to nothing. GERMA_4Button_433_Remote.zip

zuckschwerdt commented 4 months ago

The signal is somewhat unstable but works. It's also at 434.02M to 434.04M so tuning a little hight would be better. This should work: rtl_433 -f 434.0M -X 'n=name,m=OOK_PWM,s=240,l=740,g=1000,r=8000,t=100'

Codes in the samples are:

which is expected for a EV1527 encoder. Adapt one of our EV1527 conf files, e.g. something like

        bits>=24,
        bits<=25,
        repeats>=3,
        invert,
        get=@0:{20}:code:[859479:REMOTE-A 123456:REMOTE-B],
        get=@20:{4}:button:[1:A 2:B 3:AB 4:C 5:AC 6:BC 7:ABC 8:D 9:AD 10:BD 11:ABD 12:CD 13:ACD 14:BCD 15:ALL],
        unique
waltje commented 4 months ago

This will require some more testing. I received three more sets of these, from a different supplier (red LED and slightly differently colored keys),and those DO get recognized by default.

gdt commented 3 months ago

@waltje Please don't quote email from github in comments. It is very hard to follow and just adds noise.

What's next? Is this an answered question, or is someone(tm) going to contribute a PR that documents this for others?

zuckschwerdt commented 3 months ago

Closed as this is not a todo item for rtl_433. Feel free to ask for further help if needed or add a PR with your findings if you like. Please don't comment chat-like, we can barely handle the volume of issues.