Conlan Kreher conlank

Create Root CA (Done once)

Last update: Nov 2025.

Create Root Key

Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!

openssl ecparam -genkey -name secp384r1 | openssl ec -aes256 -out rootCA.key

Prerequisite - Outdated. I don't use the resonance testing branch or pulses method anymore.

I recommend running Dmitry’s latest resonance testing branch and using the pulses method outlined below:

https://github.com/Klipper3d/klipper/issues/4560
https://github.com/dmbutyugin/klipper/tree/resonance-test-methods

I would only go down this path if you're getting ghosting with really high speed prints. On the Annex Engineering K3 for example, no matter how perfect the graphs looked, I was still getting some ghosting. That prompted me to go down this path. I'm now able to print at 20-30k acceleration, 250-350mm/s, and 15scv with perfect quality that can usually only be seen at significantly slower speeds.

The default settings in Klipper have the damping ratio set to .1. This should be fine for most people with sane settings. I like to go for the insane.

Frequency Testing

This will allow you to test a specific frequency that you hear when you do your resonance testing in Klipper and potentially track down where extra peaks are coming from. If something is rattling at a specific frequency, you can specify that frequency and feel around the printer until you track it down.

Code was adopted by zifnab from somewhere in Klipper.

Usage

You have to have [resonance_holder] in your printer.cfg.

The command is HOLD_RESONANCE AXIS=<axis> FREQ=int SECONDS=<seconds>

	#!/bin/sh
	if [ "$#" -eq 1 ]; then stdinmsg=$(cat); fi
	exec <"$0" \|\| exit; read v; read v; read v; exec /usr/bin/osascript - "$@" "$stdinmsg"; exit

	-- another way of waiting until an app is running
	on waitUntilRunning(appname, delaytime)
	repeat until my appIsRunning(appname)
	tell application "Messages" to close window 1
	delay delaytime
	end repeat

	# ========================================================
	# Setup a Dumb AP, Wired backbone for OpenWRT / LEDE
	# ========================================================
	# Set lan logical interface as bridge (to allow bridge multiple physical interfaces)
	uci set network.lan.type='bridge'
	# assign WAN physical interface to LAN (will be available as an additional LAN port now)
	uci set network.lan.ifname="$(uci get network.lan.ifname) $(uci get network.wan.ifname)"
	uci del network.wan.ifname
	# Remove wan logical interface, since we will not need it.
	uci del network.wan