2018-05-08 17:25:41 +02:00
define(`TITLE', `4 Channel MBus-connected Thermometer, Part 2')
define(`DATE', `2014-03-09')
define(`CONTENT', `
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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.
2018-05-08 17:25:41 +02:00
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