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I keep forgetting the default-password of the Growatt ShineWiFI-X used to connect the Growatt PV-Inverters to their cloud-service. Therefore I created this blogpost to keep me reminded of the password userd to connect to the Wi-Fi dongle during the first setup. growatt growatt-20221120 (put the current date in there) 12345678 Additionally, a installer code is needed during the registration of the inverter in the app. If you live in germany and are not willing to request a code on your own (by mail to: service....

During the morning of the 8th of November 2022 multiple customers contacted me regarding connectivity issues to services pretty much all across the internet. Once I started digging through the traceroutes and MTRs of customers, I found most of them showing excessive packetloss starting at a hop resolving to “dtag.equinix-fr5.nl-ix.net”. Until that point, I have not even been aware that Deutsche Telekom (AS3320) is connected to NL-ix as they’ve neither listed their presence at PeeringDB…...

Today, I had a strange issue with IPv6 on my Proxmox VE based Hypervisors. I configured IPv6 for a customer by using a transfer subnet between our gateway router and the virtuel firewall. Additionally, I’ve routed a /56 subnet to be used by the customer onto the firewall and added a few /64s onto the internal interfaces of the customer. Once I configured static addresses on the servers running behind the firewall, they were able to reach the IPv6 internet without any issues....

During the last month, our engery supplier installed a digital meter for our power usage at home. As he in addition to that offered to unlock the device or to give us the PIN to unlock it ourselves, I were looking for a solution to extract the data from the meter and push it into our Home Assistant installation. I bought the Volkszähler TTL from eBay and wired it onto the serial interface of an ESP8266 laying around on my desk....

Flying has been always one of my dreams. My aviation career initially started as a small kid when my parents registered me on a holiday-course to build a small model glider (Graupner RC UHU). After roughly one week of crafting, the small model airplane was ready and successfully had its maiden flight on a hill near the village I lived. A few months later, I upgraded it with a kit providing an electric motor and a bigger battery so it could stay in the air even during bad wind conditions....