Simulating RF Remote Control

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i trying send commands ceiling fans using arduino nano , rf transmitter (ucec xy-mk-5v). took me long time stage believe have right commands , can duplicated them. however, fan not respond commands. fan listed 434mhz rf device , using sdrsharp believe frequency 433.925mhz. used universal radio hacker record signals remote. used arduino transmit signal. attached image shows parts of signal. @ bottom recorded remote , on top emit. copy pretty close in timing original. note beginning , there 4x more after again timing quite similar. biggest difference original shows 4 sinus waves per bit while copy has many more (which why shows black). have feeling can't trust signals though because device runs @ 434mhz , sampling @ 1msps. record on-off states , in between random. still, maybe reason why can't control fan. if can shed light on appreciate it.

looks me carrier frequency way high compared original waveform.

i've never used 433mhz radio modules, imagine need send message envelope radio , radio sends envelope modulated @ correct frequency, resulting in correct waveform.

can post arduino code?


Arduino Forum > Using Arduino > Networking, Protocols, and Devices (Moderator: fabioc84) > Simulating RF Remote Control


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