Nov 15, 2011

2.4GHz (WiFi) Arduino Spectrum Analyzer - Part 3, CYWM6935 Wireless Radio Module


CYWM6935 Wireless Module

This module is the heart of the Spectrum Analyzer.  Since I "borrowed" the code from  Richi's Blog, I can't really explain how the code is working. But, it does work! Richi's code examples are available on github.

I fork from Richi's "Fritzing" picture example in my final prototype (no wiring picture available for that, see video below) in that I don't make any attempt at level shifting, I run my Atmega chip at 3.3V directly from a battery.

The tricky thing with the CYWM6935 is the spacing on the already-soldered pins - they're too narrow for standard 0.1" female jumpers that you may get from sparkfun or Pololu. For prototyping, I used some very narrow female-to-male jumpers from SchmartBoard, these worked great. In the finished product, I used narrow-spaced IDC 10-pin female header cable, similar to this one at sparkfun,  to connect up the CYM6935.
IDC 2x5 Pin Female Cable


Here's a video showing the transition from prototype to (more-or-less) finished product:







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