Category: IT

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Picked my KW902 apart today to see what’s inside. It features probably a SN65HVDA1050A CAN tranciever (ISO 11898-2 high speed up tp 1 Mbps) a BK3231S SoC for Bluetooth 3.0 and 4.0 programmable via JTAG/FLASH both controlled by a PIC18F25K80 (cheapest of the family, also up to 1Mbps bit rate, comforms to CAN 2.0B) programmable via ICSP.

KW902 ODB2 dongle on the inside

The pins for ICSP may be exposed on the cable for the LED and RST button but since I don’t have the equipment to read out the firmware I didn’t look too closely and called it a day – for now. This cheap IC costs ~2 EUR btw and is well documented.

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tl,dr: `systemctl suspend`

Sometimes I let my pc play music at night. Spotify still didn’t manage to implement a sleep function (even gorram Audible has this – and chances are the app crashes way before anyway).

I usually use `shutdown -h 60` or similar. Suspend tho? That’s another story. Hint: “suspend” is a bash builtin and not what you’d expect 😉

Looks like this changed (again) from `pm-suspend` to… systemd:

> sleep 1h; systemctl suspend

No sudo. yw.

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Did you know `ncdu`? I’m using this for years to find out where all my precious disk space is lost. Unlike other solutions it works in a terminal and this way even on remote servers… or gorram mobile phones always short on anything.