{"id":5097,"date":"2023-09-30T09:50:07","date_gmt":"2023-09-30T07:50:07","guid":{"rendered":"https:\/\/www.sigalou-domotique.fr\/?p=5097"},"modified":"2026-01-02T16:57:13","modified_gmt":"2026-01-02T14:57:13","slug":"jintegre-le-power-boost-em112-de-chez-carlo-gavazzi-dans-home-assistant-via-le-port-rd485-modbus","status":"publish","type":"post","link":"https:\/\/www.sigalou-domotique.fr\/en\/jintegre-le-power-boost-em112-de-chez-carlo-gavazzi-dans-home-assistant-via-le-port-rd485-modbus","title":{"rendered":"I integrate the Power Boost EM112 from Carlo Gavazzi into Home Assistant via RS485 (Modbus)"},"content":{"rendered":"

Important information<\/h3>\r\n
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Note that the integration described below can only work if the USB\/RS485 stick is the only equipment on the RS485 bus connected to the EM112. Indeed (and with the help of Eric G.) I understood that there could only bea single master equipment on the bus<\/strong>. The master is the one who questions and the slave the one who answers. EM112 is therefore a slave.<\/p>\r\n

My first idea was to sniff out the lines of dialogue between EM112 and my Wallbox, the Wallbox being the master, I cannot do that. For the beauty of the exercise, I tested with two masters, it works we find values but from time to time, when the two masters ask a question together, we find ourselves with an error.<\/p>\r\n

If someone can point me towards a way of \u2018snipping\u2019 bus 485 to intercept the information that the EM112 sends to a Wallbox, for example, I am a taker because at this stage I cannot have a Wallbox and a RS485\/USB Key in parallel (two masters).<\/strong><\/p>\r\n<\/blockquote>\r\n

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 Equipment used and drivers<\/h3>\r\n

The most expensive piece of equipment in my entire painting (\u20ac1.33 on Ali<\/a> \ud83d\ude02), it works, obviously there are fake keys, I may have been lucky but this seller is serious.<\/p>\r\n