Smart-Meter madness I want to read out the meter values from my smart power meter (Sagemcom T210-D). It does come with a P1 port (DSMR 5 standard). I have the proper cable, and I do receive frames from the meter. They’re encrypted with AES 128-GCM. In addition, an AAD (“additional authentication data”) is needed. I did request the keys from my utility company, but according to them they can’t get the keys from their distributor (Kapsch).

wM-Bus follow up I did receive the AES key from the “Wasserverband Steinberg” - http://www.wv-steinberg.at . They’ve been very helpful, the key was delivered as KEM file together with the decryption pin. The wmbusmeters utilities allowed me to extract the AES key. Unfortunately I was not able to receive any frames with the nanoCUL device from the Kamstrup Multical 21. The reason was that it does send C1 telegrams. And the latest release from culfw does not include C1 support (only T1 and S1).

Introduction Wireless-M-Bus (EN13757-4:2014-2) is integrated in a lot of modern smart meters. My water utility company replaced the old analog meter with a Kamstrup Multical 21 water meter. It includes a wM-Bus module and transmits data every 16 seconds. Software I’ll be using the ‘wmbusmeters’ project to receive the meter data. The package is included in latest Fedora Linux, together with rtl-sdr, so installation was quick and easy. Hardware There are different hardware options to receive wM-Bus signals on a linux based computer.

Introduction This is a follow up to the ESP8266 article on agocontrol news. The GY-63 sensor board is drawing a lot current (around 2mA) due to its level shifters and the voltage regulation. Hence I’ve abandoned my plan to use one. I’ll probably get a few test units of the Bosch BE280, it might be a good option for a esp8266 based battery powered weather station. For now I’m going to use a DHT22 as I want to measure a scenario with real sensors.

Disclaimer This information is provided as is with no warranty. If you burn your kitchen sink don’t blame me. Introduction This tells the tale of our VoIP-tests. Prerequisites * Cisco 2800 Router (with DSPs) * Cisco VIC2-2BRI-NT/TE or EM-4BRI-NT/TE * IOS ipvoice or other voice feature sets Sample Network Asterisk — Router0 — ISDN PtP BRI Hints * use „compand-type alaw“ in voice-port or you get distorted sound * set „static-tei 0“ or point-to-point setup won’t work * don’t send the „display-ie“, Austria Telecom doesn’t like this * without „isdn sending-complete“ you can’t initiate calls (Phunny note: Cisco says: „required in Hong Kong…“) * handle your cisco gear with care!

Disclaimer This information is provided as is with no warranty. If you burn your kitchen sink don’t blame me. Introduction This tells the tale of our CEoIP-tests. Prerequisites Cisco Router (2600XM or bigger, needs 128 MB RAM) Cisco Network Module NM-CEM-4SER or NM-CEM-4TE1 IOS 12.3(7)T, one of the following Featuresets: • SP Services • Enterprise Services • Advanced Enterprise Services • Advanced IP Services • 128 MB RAM for your Router

Disclaimer This information is provided as is with no warranty. If you burn your kitchen sink don’t blame me. Copyright © 2002 vt100.at Introduction This is a small howto play Dune Emperor in LAN Multiplayer mode with the nodes sitting in different subnets. We use the udp forwarding feature of Cisco („ip helper“) to unicast forward the initial game setup broadcast packets from the client to the game host.