From 9607586695eb55651595b7ddc74a2fc1d1a33c75 Mon Sep 17 00:00:00 2001 From: Roar Fredriksen Date: Thu, 1 Mar 2018 21:41:02 +0100 Subject: [PATCH] Info about HAN_ESP_TSS721 --- Electrical/README.md | 33 ++++++++++++++++++++++++--------- 1 file changed, 24 insertions(+), 9 deletions(-) diff --git a/Electrical/README.md b/Electrical/README.md index f38f723d..38b687a9 100644 --- a/Electrical/README.md +++ b/Electrical/README.md @@ -3,16 +3,33 @@ Here are links to the different board designs together with a short summary. +## HAN_ESP_TSS721 (The current design) +This is the current and most robust design for the [main board](HAN_ESP_TS7221). 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/) + +The board + +* uses TSS721 for MBus to TTL conversion +* holds ESP8266 for processing and transmit HAN data to WiFi / MQTT +* full schematics and PCB in editable [KiCad](http://www.kicad-pcb.org/) source files +* features a temperature sensor (DS18B20) +* uses a modular design, leaving these features optional + * temperature sensor + * M-bus TX + * WiFi (Leave ESP, power supply and use for only M-bus to TTL) + +### Status + +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. ## HAN_ESP_Simple (Was: Board 1) The project's original [board design](HAN_ESP_Simple). 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. +* 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 @@ -24,8 +41,8 @@ This [board design](HAN_TTL_TSS721) 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](http://www.kicad-pcb.org/) source files. +* is optically isolate +* has shematic and pcb design available in editable [KiCad](http://www.kicad-pcb.org/) source files ### Status @@ -34,12 +51,10 @@ Unfinished, just started. ## MBUS_Simulator (Was: Board 3) This [board](MBUS_Simulator) 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. +test the other boards without being dependent on having and using a real AMS unit. ### Status Implementation done. - Please also see [Getting started building or modifying](GETTING_STARTED.md)