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Wolfgang Hottgenroth
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<title>Projects - just for fun</title>
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AVR-Arduino replaced by ARM-based Teensy, due to memory shortness:
<a href="http://a385e-5.de/wp-content/uploads/2014/03/Foto-2.jpg"><img src="http://a385e-5.de/wp-content/uploads/2014/03/Foto-2-300x225.jpg" alt="Foto 2" width="300" height="225" class="alignnone size-medium wp-image-416" /></a>
MBus-transceiver TSS721A in breadbroad setup with two opto-coupler, connected to the thermometer and to the lab MBus-master:
<a href="http://a385e-5.de/wp-content/uploads/2014/03/Foto-1.jpg"><img src="http://a385e-5.de/wp-content/uploads/2014/03/Foto-1-300x225.jpg" alt="Foto 1" width="300" height="225" class="alignnone size-medium wp-image-415" /></a>
Test setup with thermometer, MBus-transceiver and lab MBus-master (still open enclosure since over current protection is not yet available, just to not forget it ...):
<a href="http://a385e-5.de/wp-content/uploads/2014/03/Foto-4.jpg"><img src="http://a385e-5.de/wp-content/uploads/2014/03/Foto-4-300x225.jpg" alt="Foto 4" width="300" height="225" class="alignnone size-medium wp-image-414" /></a>
And, yes, it works so far. Although it was a bit of a surprise to see the echo of any sent frame, however, the documentation revealed that this is actually a collision detection feature.
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