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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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Modification of library to work with Arduino Uno (16MHz) #3

Closed rocksyne closed 6 years ago

rocksyne commented 7 years ago

Dear Christoph,

Greetings. Regarding the use of this great library, I read in one of the opened issues that you only tested it on 12MHz board. What I intend to do is to read data from the antenna reception into the MCU. I have been trying to modify the code to adapt to my board but I am unable to tune the antenna. The best frequency I am getting is [Frequency: 2057 ] and subsequently:

Testing bit: 4 Frequency: 2057 Testing bit: 3 Frequency: 3 Testing bit: 2 Frequency: 3 Testing bit: 1 Frequency: 3 Testing bit: 0 Frequency: 3 Calibration for antenna 1 fails

Can you please recommend to me a solution approach? Thank you for your time and have a blessed day.

Kind regards, Rockson.

LieBtrau commented 7 years ago

Hi Rockson, For the autocalibration steps, the freqcount-library is used, which was designed for 16MHz Arduino uno. I think the autocalibration steps should work without modifications. To be honest, I spent quite some time adjusting my hardware to make this work. The parallel capacitors should be matched to your coil for parallel resonance on 125kHz. I think the problem was caused by my hardware. The parallel caps should be as close as possible to the coils. You'd better use the design of the evaluation kit as a start.

rocksyne commented 7 years ago

Thank you very much for your quick response. I will redo my hardware and test again as recommended.

Regards, Rockson.