mirror of
https://github.com/UtilitechAS/amsreader-firmware.git
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41 lines
984 B
Markdown
41 lines
984 B
Markdown
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# Overview
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Here are links to the different board designs together with a short summary.
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## Board 1
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The project's original [board design](Board_001). It
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* is based on the ESP8266 chip.
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* is powered by USB.
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* uses a very simple voltage divider to demodulate the M-bus signal.
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* has shematic and pcb design only available as finished pdf/png files.
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### Status
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Prototypes have been made and some people have started using them(?).
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## Board 2
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This [board design](Board_002) is a newer alternative to the original. It
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* is an Arduino shield.
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* uses the industry standard TSS721 chip to interface the M-bus.
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* is optically isolated.
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* has shematic and pcb design available in editable [KiCad](http://www.kicad-pcb.org/) source files.
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### Status
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Unfinished, just started.
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## Board 3
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This [board](Board_003) is a M-bus master simulator to be able to develop and
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test the other boards without being dependent on having and using a real
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AMS unit.
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### Status
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Implementation done.
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