WietseWind

# Auto resume claude

# -- Claude Code: auto-resume sessions --
autoload -Uz add-zsh-hook
    
_claude_session_check() {
  if [[ -f .claude_session ]]; then
    echo "💡 Saved Claude Code session found. Run 'claude' to resume."
  fi
} 

WietseWind

Flashing Espruino on Seeed XIAO ESP32-C3 (macOS)

1. Detect connected USB devices

system_profiler SPUSBDataType

The XIAO ESP32-C3 shows up as a CP2102N USB to UART Bridge Controller (Silicon Labs) when using an older unit, or as a native USB-Serial/JTAG device on newer units.

WietseWind

var  on = false;
const blinkInterval = setInterval(function() {
  on = !on;
  LED1.write(on);
}, 500);

 var WIFI_NAME = "Test";
 var WIFI_OPTIONS = { password : "xxxx" };

var wifi = require("Wifi");

WietseWind

#!/usr/bin/env node

import { SerialPort } from 'serialport';
import { setTimeout as sleep } from 'timers/promises';
import { parseArgs } from 'util';

// --- SHDLC protocol ---------------------------------------------------------

const SHDLC_DELIM = 0x7e;
const STUFF = { 0x7e: [0x7d, 0x5e], 0x7d: [0x7d, 0x5d], 0x11: [0x7d, 0x31], 0x13: [0x7d, 0x33] };

WietseWind

#!/bin/bash
# ZFS Performance Tuning - Non-persistent (apply after each reboot)
# Auto-detects pools, datasets, and disks

set -e

echo "=== ZFS Performance Tuning ==="

# --- ARC: set to ~200GB (adjust if your servers have less RAM) ---
ARC_MAX=214748364800

WietseWind

import lib from "xrpl-accountlib";
import { XrplClient } from 'xrpl-client'

const vanityAccount = "rrrrrrrr";
const signWithRegularKeySecret = "ssssss"; // or use secret numbers and change the derive fn below

const tx = {
  TransactionType: "Payment",
  Account: vanityAccount,
  Fee: "12",

WietseWind

[validator_list_sites]
https://vl.ripple.com
https://unl.xrplf.org

[validator_list_keys]
# Ripple
ED2677ABFFD1B33AC6FBC3062B71F1E8397C1505E1C42C64D11AD1B28FF73F4734
# XRPLF
ED42AEC58B701EEBB77356FFFEC26F83C1F0407263530F068C7C73D392C7E06FD1

WietseWind

# NOTE!! DO THIS ONE BY ONE, IT FAILS IF TWO NODES TRY TO JOIN AT THE SAME TIME!

# export LANG=en_US.UTF-8
# export LC_ALL=en_US.UTF-8

#pvecm expected 1

# Clear join (back to standalone)

systemctl stop pve-cluster corosync

WietseWind

// Eg run @ https://www.programiz.com/java-programming/online-compiler/
// data: 48 65 6C 6C 6F 20 57 6F 72 6C 64
// CRC-16: 52 7B


class Main {
    public static byte[] calculateCRC16(byte[] bytes) {
        byte chBlock;
        int wCRC = 0x6363;
        int i = 0;

WietseWind

#!/bin/bash
PORT=12345
RESULTS_DIR="udp_receiver_results_$(date +%Y%m%d_%H%M%S)"
mkdir -p "$RESULTS_DIR"

echo "Starting UDP fragmentation test - Receiver"
echo "----------------------------------------"
echo "Port: $PORT"
echo "Results directory: $RESULTS_DIR"