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LieBtrau / arduino-as3933

Arduino interface to the AS3933 3D LF wakeup receiver
GNU General Public License v3.0
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Manchester pattern #1

Closed ashiq1213 closed 8 years ago

ashiq1213 commented 8 years ago

I want to generate 125Khz signal with manchester pattern. I tried using this library but couldn't find the output in CRO.

ashiq1213 commented 8 years ago

this is my thesis. I jus want AS3933 to detect 125kHz signal and give an interrupt to microcontroller to make it awake from sleep mode. I am using 868MHz indoor antenna to receive the signal and it is followed by impedance matching and Envelope detector to As3933. I tried giving 125Khz signal to 9th pin of As3933 and check the output of wake pin in oscilloscope. It gave some negative spikes with pulse. And using interrupt program I realized am getting 0 as output from wake pin. I will try to redo my schematic and hardware.

LieBtrau commented 8 years ago

So you're AM-modulating a 125KHz waveform onto an 868MHz carrier? I haven't seen AM-modulation on that frequency. Most modules uses some kind of FM. There must be a reason for that. Do you already have hardware to do that? I hope so, otherwise you won't be able to test your AS3933 circuit. I suggest you then build your receiver circuit (disconnecting the AS3933 on pin 9) and check what waveform you're receiving. If the demodulated waveform looks ok, then you can hook up the AS3933 to it and start debugging.

ashiq1213 commented 8 years ago

Am using an signal generator for modulation. I read from a research paper with this kind of testing. And this As3933 also has a feature of going to receiving mode without pattern detection. Am trying to figure out how to check this As3933 working without pattern detection. On 10 Sep 2016 09:48, "Christoph Tack" notifications@github.com wrote:

So you're AM-modulating a 125KHz waveform onto an 868MHz carrier? I haven't seen AM-modulation on that frequency. Most modules uses some kind of FM. There must be a reason for that. Do you already have hardware to do that? I hope so, otherwise you won't be able to test your AS3933 circuit. I suggest you then build your receiver circuit (disconnecting the AS3933 on pin 9) and check what waveform you're receiving. If the demodulated waveform looks ok, then you can hook up the AS3933 to it and start debugging.

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LieBtrau commented 8 years ago

Hi Ashiq,

If you experience problems with the library, let me know in a new issue. Almost all functionality of the AS3933 is covered now. e.g. "receiving mode without pattern detection": setWakeUpProtocol(As3933::WK_FREQ_DET_ONLY)

I'll close this issue, because your initial problem "can't create manchester code output" has been solved.

We went way out of topic with this issue. I won't make this a habit. You should ask guidance from your thesis promotor. If you have problems not concerning this library, I'll close them as being irrelevant.

ashiq1213 commented 8 years ago

thank you for your library On 10 Sep 2016 20:31, "Christoph Tack" notifications@github.com wrote:

Closed #1 https://github.com/LieBtrau/arduino-as3933/issues/1.

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