Talal TalalMash

Hijacking Wi-Fi Direct for Seamless Wi-Fi Onboarding on Raspberry Pi without using BLE

SoftAP multi-role Issues

Acting as access point and client at the same time

In captive portal applications, specifically when using Wi-Fi onboarding flow over the same Wi-Fi adapter:

Windows, iOS and macOS will retry during the disconnection while scanning the same SSID, which works well if the authentication succeeds and connection is established in less than 5 seconds. Otherwise, the user has to be instructed to manually reconnect, breaking UX flow.
Android, GNOME, and ChromeOS will disconnect if their connectivity check endpoint does not return 204 at any time during the short period of disconnection.

USB ethernet gadget on Raspberry Pi OS compatible with:

Windows 10 1709+ (driverless)
MacOS
iOS 13+
Android (RNDIS is used for Android 6 and below) *1
Linux (ECM supported *2)

*1 Android will not request for an IP address if gateway is empty or internet is not found after the first connection, requiring a reboot. To mitigate, add captive portal redirect page or toggle airplane mode.

Effective on any OLED display and 600+ nit LCD display, only with good ambient light.

Set color profile to Cinema

Comparision with HDR10+ display, reference on left:

Comparision without 3D-LUT: Plex tonemapping, Handbrake bt.709, Netflix... ingot is dim and shadows are darker:

Requirements:

Rigid couplers (use ball bearing inside the coupler for flexible type)
Add extra 20mm in your Z limit configuration to allow stepper stalling
Physical limiter (e.g a screw in the extrusion on both sides with equal distances)
(Optional) Software current control for low noise on stalls; using TMC in this example

Functions:

Aligns the two leadscrew-driven motors only once after powerup on the first G28 command until next power cycle.

	#!/bin/sh

	#Youtube playlist/video archiver, downloads changes on subsequent run, keeps track in archive.txt file.

	#Install yt-dlp from pip: pip install yt-dlp --break-system-packages
	#Reopen terminal, run `sh ytdl.sh https://playlistvideourlhere <optional command>`
	#Use cookies and remove sleep-interval max-sleep-interval for much faster playlist parsing and speeds.
	# --cookies ${COOKIES} \
	#https://chromewebstore.google.com/detail/get-cookiestxt-locally/cclelndahbckbenkjhflpdbgdldlbecc

	import 'package:flutter/material.dart';
	import 'package:flutter/gestures.dart';
	import 'dart:async';
	import 'dart:io' show Platform;
	import 'package:flutter/foundation.dart' show kIsWeb;
	import 'package:universal_html/html.dart' as html;

	bool isDesktop() {
	final userAgent = html.window.navigator.userAgent.toString().toLowerCase();
	if (kIsWeb) {

	Download binaries: https://github.com/TalalMash/ubond/releases/tag/v0.1.1
	Disable encryption for 400Mbit+ , force DNS over HTTPS if needed.
	Temporarily running as root. (tun bugfix TODO)
	----------------------
	VPS/crontab -e:
	@reboot screen -d -m sh -c "/root/startubond.sh"
	----------------------
	/root/startubond.sh
	----------------------
	#!/bin/sh

	Rule1 ON sr04#distance>0 DO Backlog var1=((((%value%)-20)-(EM-20))/(EM-20))-100; var2=(var10.01)LT; event sendval ENDON
	Rule1 + ON event#sendval DO publish tele/watertank/LEVEL %var1% ENDON ON event#sendval DO publish tele/watertank/VOLUME %var2% ENDON
	Rule1 1

	Replace:
	-LT with the number of liters
	-EM with the distance when the tank is empty.

	You will get percentage (level) and number of liters, accurate starting from 60cm deep tanks.
	SR-04 (water proof) is recommended for use.