Build Your Own Amazon Dash With the Raspberry Pi
Amazon Dash is a pretty silly way to re-order various items from Amazon. That said, if you like the idea of this and prefer more control, Master Denis Papatanasiou will show you how to create your own with a Raspberry Pi.
The Papatanasiou version gives you a lot more control over what you order and how much you pay. Basically, you connect the Pi to a scanner and scan the items you want to order. It works with any product and you can refuse an order if it is too high. Basically, this is a really useful Amazon Dash. You can find the manual and software to do it yourself on the Papatanasiu website below.
PiScan: Open Source Version of Amazon Dash Button Using Raspberry Pi | Denis Papatanasius