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6d11d6a73f
The design in mbus_master_004.qucs-s.sch only "works" when given a constant initial 5V or 0V input. When given a pulse as input mbusminus does not properly go back to VCC as intended. This redesign provides a solution to do so.
Overview
Here are links to the different board designs together with a short summary.
Board 1
The project's original board design. It
- is based on the ESP8266 chip.
- is powered by USB.
- uses a very simple voltage divider to demodulate the M-bus signal.
- has shematic and pcb design only available as finished pdf/png files.
Status
Prototypes have been made and some people have started using them(?).
Board 2
This board design is a newer alternative to the original. It
- is an Arduino shield.
- uses the industry standard TSS721 chip to interface the M-bus.
- is optically isolated.
- has shematic and pcb design available in editable KiCad source files.
Status
Unfinished, just started.
Board 3
This board is a M-bus master simulator to be able to develop and test the other boards without being dependent on having and using a real AMS unit.
Status
Implementation done.