define(`TITLE', `4 Channel MBus-connected Thermometer, Part 2') define(`DATE', `2014-03-09') define(`CONTENT', ` AVR-Arduino replaced by ARM-based Teensy, due to memory shortness: MBus-transceiver TSS721A in breadbroad setup with two opto-coupler, connected to the thermometer and to the lab MBus-master: 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 ...): 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. ')