Frequently Asked Questions
Is the Droidalyzer a professional Breathalyzer that outputs a BAC (Blood Alcohol Content) reading?
No, while the Droidalyzer does contain a real alcohol sensor (semiconductor based) and plays different audio responses relative to alcohol levels, it does not output BAC and rather is a novelty device for entertainment purposes only.
Can I calibrate it myself to output BAC?
Since it's open source, technically you could modify the source code, attempt to calibrate the sensor, and then add a BAC reading. We highly recommend not to do this however and we purposely did not go here as reports have shown that while semiconductor based alcohol sensors are acceptable for detecting the presence of alcohol in human breath, they are not accurate enough for a precise BAC reading. If you want BAC, best to look for a professional Breathalyzer with a fuel cell based alcohol sensor.
What is included with the Droidalyzer?
The Droidalyzer comes fully assembled in a laser cut mint tin with bluetooth, re-chargeable battery, and a micro USB cable. A USB charger is not included, use a USB charger with a micro USB connector such as this one.
How do I Bluetooth pair the Droidalyzer to my Android phone?
Pair is just like any other Bluetooth device from Android Settings --> Wireless & Networks --> Bluetooth Settings --> Scan for Devices. Then look for IOIO and use code "4545". You can also refer to this video which illustrates the Bluetooth pairing process.
Can I pesonalize the Droidalyzer with my own alcohol level responses?
Yes, there is a Text to Speech mode where you can enter your own response for each of the four alcohol levels.
What version of Android is required to run the Droidalyzer?
You'll need a device with Android version 2.3.3 or higher to use the Droidalyzer in Bluetooth mode. Android 2.1 and above will also work over Bluetooth but you'll need to enter the Bluetooth pairing pin for each session (kind of a pain). Bluetooth will NOT work for Android 1.6 up to 2.1, for these devices you'll instead connect the Droidalyzer to your phone with the included USB cable. As each Android device manufacturer does things a little different, we cannot guarantee 100% compatability across all Android devices but we can say most devices will work with the exception of Android Honeycomb tablets which are not supported. You can reference this list and see if your specific device has been tested.
What is IOIO?
IOIO is the name of the open source microprocessor board used by the Droidalyzer. The Droidalyzer will show up in Bluetooth as IOIO for pairing. If you can do a little coding, this means in addition to the alcohol detection function, the Droidalyzer can be expanded to do other things.
Is the alcohol sensor replaceable?
Yes, the alcohol sensor part number is MQ303A, you can buy a replacement here. Simply pop out the existing one and plug in the new one. Note you'll want to clip the leads of the new alcohol sensor before popping it in as they will too long.
What if I lose the Bluetooth dongle?
No worries, just get a replacement USB bluetooth dongle. Note that not all Bluetooth dongles are compatible so choose one of these which have been tested.
How long will the Droidalyzer battery last before it needs re-charging?
Assuming normal use meaning you turn it off when not in use, it should last 2 or 3 nights when used on nights out with friends. There is a battery indicator on the Droidalyzer app.
Does it work on the iPhone too?
Not at this time, we'd love to do an iPhone app but special permission is required from Apple to make an iPhone hardware accessory.