Blog

Own syncserver with Firefox 80 (79 on Android)

Posted on August 29, 2020

Since the Firefox update to version 80 and 79 on android a few things have changed to be able to use your own syncserver as described in the blog post Setup your own Firefox Sync Server with Docker. [Read More]

Tags: firefox howto cloud

Docker monitoring

with Grafana, prometheus, cadvisor and exporter

Posted on August 15, 2020

[Read More]

Tags: Docker Grafana Monitoring Raspberry Pi HowTo

ESP32 DeepSleep and LoraWAN OTAA join

Posted on April 13, 2020

When the ESP32 goes into DeepSleep and wake up, it will not restart the code execution from where it entered DeepSleep, like an ATmega witch restarts code execution at the same place including all set variables. The ESP32 starts in the Setup function an reinitializes all variables, this means that... [Read More]

Tags: ESP32 LoraWAN Arduino µC LMIC TTN

Low power Arduino Pro Mini

Posted on December 27, 2019

For various projects where a long runtime with batteries is important I use a modify Arduino Pro Mini 328 3.3V/8Mhz (ATmega328P). As an example a flashing sketch is used, which turns the LED on for 1 second and off for 8 seconds. [Read More]

Tags: howto hack Arduino µC Hardware

gnupg cannot connect to keyserver

keyserver receive failed: Connection refused

Posted on June 7, 2019

On a docker project where i had to add gnupg keys i always got an error keyserver receive failed: Connection refused. After a while of troubleshooting, i realized it’s not a connection or DNS problem. But that the Dirmngr did not use the configured DNS servers of the system. gpg... [Read More]

Tags: docker error troubleshooting

Security hardware key on Github with Firefox

Spoof User Agent in Firefox

Posted on June 7, 2019

Github currently supports hardware security keys (SoloKeys, Yubico, …) as second factor only with Google Chrome but not with Firefox, although Firefox supports U2F and on other sites this also works flawlessly. This browser doesn’t support the FIDO U2F standard yet. [Read More]

Tags: howto firefox U2F SoloKeys security FIDO U2F 2FA

PowerShell and MQTT

Posted on June 5, 2019

A small blog entry how to use MQTT in Powershell, as a library I use M2MQTT. [Read More]

Tags: powershell code mqtt iot

Setup your own Firefox Sync Server with Docker

Posted on November 3, 2018

If you don’t want your bookmarks, tabs, cronics, … to be stored by Firefox in the Firefox cloud, you can run your self-hosted Firefox Sync server. After that, only the Mozilla-hosted accounts server (https://accounts.firefox.com) is used, but the data is stored locally. [Read More]

Tags: docker howto network cloud firefox

Overlapping subnetworks or how to change Docker default subnet size?

Posted on October 31, 2018

Several services already running were no longer available from subnets after a new container was created using docker-compose. The control of the IP addresses showed that a new network 192.168.X.0/20 was created, which overlapped the existing networks and therefore the communication did not work anymore. [Read More]

Tags: docker howto error troubleshooting network

Git Server on Synology NAS

Posted on August 25, 2018

Short HowTo to install and configure of a Git Server on a Synology NAS with DSM 6.2. [Read More]

Tags: git synology howto