Virtual Arduino serial comms


While working on Telemetry Viewer, see Java grapher for Arduino serial monitor, as I didn’t have a working Arduino, I wondered if I could fake some incoming serial comms so that it appeared that there was an Arduino connected which was sending sensor data.

I mean, how hard can it be? Surely using the UNIX underbelly of OS X, with a couple of redirections and pipes, it must be easy, right? Well, no, not so easy…

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In Thailand residences, the network access is normally via building-wide Wi-Fi, and you are given a username and password and can only connect one device at a time – unless you pay for another Wi-Fi account (around 500-700 Baht/month). However, what do you do if you, like most people, have more than one device. It is somewhat of a pain to keep on having to log off on one device and then log on with another device, each time you need to swap laptop/tablet/phone/etc.

Obviously the way to do it is to connect to the Wi-Fi with a laptop, share that Wi-Fi point through the laptop’s Ethernet to your LAN. Easily done on a Mac. However, your tablets and phones (and other wireless devices, without access to Ethernet) will still be left out in the cold. So you then need to share the Ethernet  on to your own private Wi-Fi network. Here is how to do it on a subsequent spare Windows 7 laptop

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