mirror of
https://github.com/UtilitechAS/amsreader-firmware.git
synced 2026-01-17 00:52:12 +00:00
61 lines
2.0 KiB
Markdown
61 lines
2.0 KiB
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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## HAN_ESP_TSS721 (The current design)
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This is the current and most robust design for the [main board](HAN_ESP_TSS721). There's been great help in creating this, both here on GitHub, but also at the Norwegian home automation forum, [www.hjemmeautomasjon.no](https://www.hjemmeautomasjon.no/forums/topic/1982-lesing-av-ams-data-amshan-iot/)
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The board
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* uses TSS721 for MBus to TTL conversion
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* holds ESP8266 for processing and transmit HAN data to WiFi / MQTT
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* full schematics and PCB in editable [KiCad](http://www.kicad-pcb.org/) source files
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* features a temperature sensor (DS18B20)
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* uses a modular design, leaving these features optional
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* temperature sensor
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* M-bus TX
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* WiFi (Leave ESP, power supply and use for only M-bus to TTL)
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### Status
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At the time of this writing, this has never been tried as a whole, but all parts has been prototyped individually. First PCB prototypes are very soon in the order.
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## HAN_ESP_Simple (Was: Board 1)
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The project's original [board design](HAN_ESP_Simple). 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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## HAN_TTL_TSS721 (Was: Board 2)
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This [board design](HAN_TTL_TSS721) 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 isolate
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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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## MBUS_Simulator (Was: Board 3)
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This [board](MBUS_Simulator) 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 AMS unit.
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### Status
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Implementation done.
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Please also see [Getting started building or modifying](GETTING_STARTED.md)
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