From bc135ecd665393309e504a0054f32e83e651252a Mon Sep 17 00:00:00 2001
From: Chester <chester4444@wolke7.net>
Date: Sat, 29 Feb 2020 21:57:44 +0100
Subject: [PATCH] Update README.md

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 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index 259ad22..aa0af02 100644
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 # esp-multical21
 ESP8266 decrypts wireless MBus frames from a Multical21 water meter
+
+A CC1101 868 MHz modul is connected via SPI to the ESP8266 an configured to receive Wireless MBus frames. The Multical21 is sending every 16 seconds wireless MBus frames (Mode C1, frame type B). The frames are encrypted and the ESP decrypts them with AES-128-CTR. The meter information (total counter, target counter, medium temperature, ambient temperature, alalm flags (BURST, LEAK, DRY, REVERSE) are sent via MQTT to a smarthomeNG/smartVISU service (running on a raspberry).