I own the radio clock on the title picture. I’ve used it for some time but it annoyed me because it drifted a lot (several seconds a day). It’s synchronized to power network frequency but it doesn’t work well in my case and I hate to adjust the clock over and over again. So I decided to sync it automatically using esp8266. Continue reading Old radio clock upgraded to NTP
Openshift: exit code 137
If your pod exited with exit code 137 so you see something like this in pod Details page:
Last State Terminated at Jan 7, 2018 5:00:15 PM with exit code 137 (Error)
your pod has been killed with signal 9. Continue reading Openshift: exit code 137
How to recover containerized etcd in Openshift cluster
If you tried to add node to your etcd cluster and it failed, your cluster may have lost quorum and will not start again. To recover it you need to create new cluster identity. This is a short howto. Continue reading How to recover containerized etcd in Openshift cluster
ST-Link clone as STM32 dev board
Last time I played with this device, I only uploaded gnuk token software and it was done. This time I wanted to try some developement in Arduino framework. Continue reading ST-Link clone as STM32 dev board
DIY reflow fail
I wanted to try reflow soldering in kitchen owen. I had two boards – one with working ESP12 module (left) and one with working base board (right):
LEDE: added support for Kimax U25AWF-H1
Cron jobs in OpenShift
If you need to periodically run some job in OpenShift you have several options. Continue reading Cron jobs in OpenShift
ESP32 NTP OLED clock
As a first project with my new ESP32 module with OLED display I chose to build OLED clock. I thought I’ll just find some existing code, upload it and it’s done. There are a few such projects for ESP8266 in NodeMCU. So I started with NodeMCU upload. Continue reading ESP32 NTP OLED clock
WiFi enabled sprinkler controller
This project took me a year to finish but finally it’s done. What I wanted is to build an automatic IoT sprinkler controller from cheap parts. This is my story.
$2 USB crypto token for use with GPG and SSH
If you are interrested in security devices this post may be for you. Recently I’ve found a software which makes a GPG security device out of a STM32. It’s called Gnuk. You just need a compatible board, programmer, flash the firmware and you are ready to go. I was just hoping to find some cheap device to flash to play with it.
Continue reading $2 USB crypto token for use with GPG and SSH