x-yuri

Merging Rubygems and Bundler

1.sh:

#!/bin/sh
set -eux
rm -rf rubygems bundler
git clone https://github.com/rubygems/rubygems
git clone https://github.com/rubygems/bundler

stecman

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.

mrcrowl

// path: store/basket/basket.ts (module)

import { RootState } from "../../store"
import inventory, { Product } from "../inventory/inventory"

export interface Item { productId: string, quantity: number }
export interface DisplayItem { product: Product, quantity: number }
export interface BasketState { items: Item[], isLoading: boolean }

const initialBasketState: BasketState = { items: [], isLoading: false }