Deep in the heart of a Chinese click farm — and probably used by the company your company hired to build an ‘app’ — is a magical device. Call it a Beowulf Cluster of Phones. Call it the farm. By any name, it’s a whole bunch of smartphones, smart watches, tablets, and other Smart Things all controlled remotely. This is OpenSTF, or a Smartphone Test Farm. You can build your own, but as with anything requiring a whole lot of cables and devices, if you don’t plan it well, it’s going to look like crap.
[Paul] needed an OpenSTF device lab, and found the perfect product to repurpose into a great looking enclosure. This device was the Griffin MultiDock 2, a charging station for smartphones and tablets ostensibly designed for classrooms. There really isn’t a lot going on inside this $500 phone charger, with a few modifications this enclosure can become an awesome phone farm.
This charging station is not meant to be used this way. On the outside, there are ten USB ports for ten different devices. Inside, there are three four-port USB hubs providing ten ports. ADB simply doesn’t work with this setup, so [Paul] had to completely replace the USB brains of this device. With new USB hubs, an Intel Compute Stick, and Sugru, [Paul] got OpenSTF up and running. While this would have been a fantastic waste of money had [Paul] bought this phone charging dock at full retail price, he didn’t. He apparently picked this up at a reasonable price, giving him a great looking phone farm that works just like he wanted.