Takeshi Ueno utaani

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Controlling the Brother P-Touch Cube label maker from a computer

The Brother PTP300BT label maker is intended to be controlled using the official Brother P-Touch Design & Print iOS/Android app. The app has arbitrary limits on what you can print (1 text object and up to 3 preset icons), so I thought it would be a fun challenge to reverse engineer the protocol to print whatever I wanted.

Python code at the bottom if you want to skip the fine details.

Process

Intitially I had a quick peek at the Android APK to see if there was any useful information inside. The code that handles the communication with the printer in Print&Design turned out to be a native library, but the app clearly prepares a bitmap image and passes it to this native library for printing. Bitmaps are definitely something we can work with.

エンジニア向け研修

CARTA HOLDINGS（旧VOYAGE GROUP）
- 技術広報が新卒研修<Open AIハッカソン>をスパイしてみた - (2023/04/11)
- @t_wadaに学ぶテスト駆動開発【CARTA 23新卒研修】 - (2023/04/19)
- 【新卒研修】監修者@t_wadaと読む！プログラマが知るべき97のこと読書会 - (2024/04/09)
Classi
- 当たり前にリリースしていく ~ 新卒研修編 - (2021/05/20)
- リモートワークのための質問力向上研修を実施しました - (2021/12/07)
- Classi 2025年新卒エンジニア研修「そーだい塾」を開催しました - (2025/06/18)
CyberZ

Raspberry Pi 3 B+ を NOOBS 1.92からセットアップ直後からスタートする。

利用するGPS製品ははこれ

ＧＰＳ受信機キット　１ＰＰＳ出力付き　「みちびき」対応: センサ一般秋月電子通商電子部品ネット通販

Vcc GND Txd Rxd と 1pps出力の5線あるうち1pps出力以外の4線を利用する。

Vcc に 5V、TxdとRxdは3.3VでOK

リアルタイム動画配信コトハジメ

日時:	2016-01-23
作:	@voluntas
バージョン:	0.1.2
url:	https://voluntas.github.io/

Intro

The plan is to create a pair of executables (ngrok and ngrokd) that are connected with a self-signed SSL cert. Since the client and server executables are paired, you won't be able to use any other ngrok to connect to this ngrokd, and vice versa.

DNS

Add two DNS records: one for the base domain and one for the wildcard domain. For example, if your base domain is domain.com, you'll need a record for that and for *.domain.com.

	# Digital Watch Face
	#
	# Author: Tony Goodhew (28th January 2023)
	# Updates: Toby Roberts, Andrew Scheller & Alasdair Allan (March 2023)
	#
	# Original code taken from https://www.instructables.com/Digital-Watch-Display-MicroPython/

	from machine import Pin,I2C,SPI,PWM
	import framebuf
	import time

	#!/bin/bash
	#
	# This version uses September 2017 august stretch image, please use this image
	#

	if [ "$EUID" -ne 0 ]
	then echo "Must be root"
	exit
	fi

	<!DOCTYPE HTML>
	<html>
	<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
	<meta name="viewport" content="width=device-width, minimum-scale=1, maximum-scale=1, initial-scale=1.0, user-scalable=no">
	<title>map</title>
	<style>
	html, body, #map-canvas {height: 97%; margin: 0; padding: 0}
	table {border-collapse:collapse; margin:0; padding:0}
	tr, td {margin:0; padding:0}