Touch the banana, get the Wi-Fi password

Bet your office doesn’t share wireless network credentials like this… 

Turns out, bananas aren’t just an excellent source of potassium, they’re also an excellent source of wireless network credentials. Just ask Danish Reddit user and network administrator “Sysvival” who recently decided to use the fruit as a unique way to distribute Wi-Fi passwords to guests at his workplace.


The idea originated after Sysvival was asked to set up a captive portal for his office, like those seen in most hotel chains and coffee shops. The administrator decided to generate a pool of 5,000 passwords, each of which were valid for eight hours of access. These temporary codes are stored on a Raspberry Pi, which is connected to a Makey Makey GO (ATmega32U4) via a USB cable. The Makey Makey forms the a connection between the banana and Pi.

Now, whenever a visitor needs to get onto the Wi-Fi network, all he or she has to do is touch the banana, which triggers the Raspberry Pi to spit out a password on an attached display. When contact is established, the capacitance of the banana drops. The Makey Makey detects this change and interprets it as the press of a key, therefore sending the signal to the Pi that it needs to hand out a password voucher.


Why go through such lengths? According to Sysvival, “It’s fun, it’ll make people smile, it beats a static WPA password in funniness, and when people leave our office, they can’t access our Wi-Fi because there’s no banana to touch.” Intrigued? You can check out the entire project on its Reddit thread here.

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