ozon

Currently working on a #canbus to #HomeAssistant gateway with #esphome that supports DBC files.
Problem: ESP32 needs a physical connection to said CAN bus.

Sane solution: physically move ESP32 contraption to the CAN bus.

ADHD brainfart:
Set up Raspberry Pi with MCP2515 and immutable Alpine Linux that runs off RAMFS. Cross-compile Cannelloni for aarch64. Tunnel CAN bus to local machine's USB-CAN adapter. While we are at it, include serial2net.

Yes, it works. Yes, I drank too much Club Mate.

Always remember to print a date code on your PCBs so that you are always reminded that your personal project time management sucks :)

Just finished some USB-C powered #darkroom far-red led lights

did you know that the #DWD has public access to all the #Wetter data?
https://opendata.dwd.de/climate_environment/CDC/observations_germany/

I was able to pull a dataset from my local weather station and generate a simple 3d plot wit #pandas #numpy and #matplotlib to show the number of days in a year for a given temperature bin.
This is really helpful to find the sweet spot for a new #warmepumpe installation

Playing around with a simple avalanche based pulse generator. Now thats what I call fast rise time. 500MHz TDS744A scope, 1.8A peak current

"Hurr durr have you seen the recent news, #signal has been hacked"

Me: No, some politician was careless and fell victim to a simple phishing attempt and shared the login credentials. Signal is still safe.

"No that can't be true, they are politicians!"

This literally happened, twice.

1000€ worth of magic smoke.
Poor LEM Ultrastab :(
18V Zener on the -15V rail went up in flames, my guess someone swapped GND and -15V.

Fun with #Linux part 0xEF:
If you forget your emtpy µSD to SD card adapter in the SD card reader, sh!t will hit the fan.

=> BIOS will take forever to timeout to check for boot media
=> lvm2-monitor.service will take 13 minutes to time out
=> if you think it's a broken update because you are impatient and try to chroot from bootable usb: lvm2-monitor.service will wait forever

Just because two 0B disks are reported to your system.

(╯°□°)╯︵ ┻━┻

Fun with #Linux
Chasing a weird socketcand problem with savvycan for an entire afternoon just to find out it's a missing firewall entry and a savvycan quirk. You can't connect manually via TCP, it *requires* the UDP broadcast to get the connection string.

That's the nice thing about being distracted by a side-project: building your own tools.
In this case a RFC2217 compliant wifi to uart bridge including DTR/RTS for ESP programming, with galvanic isolation.
You can pass the "--port rfc2217://IP:PORT" argument to esptool and it simply works
Now I can flash and monitor from my android phones linux VM.