hunterkasce.blogg.se - Bmp badge software

#BMP BADGE SOFTWARE HOW TO#
#BMP BADGE SOFTWARE ANDROID#
#BMP BADGE SOFTWARE BLUETOOTH#

Now, instead of sending a single Hello, World! message.

And the last write requests are specific to the second example, this is probably the value for the string:, World!.

The second write request is almost similar, only one byte differs: previously 0x05 for the Hello message, now 0x0E for the Hello, World! message.

The longer the text is, the more data is sent

This time, 14 write requests were sent (instead of 8 previously).

There are lots of interesting information there: When we send the Hello message, we can see the 8 following write requests:Īt that point, it is almost impossible to understand anything. Using Wireshark, we can notice multiple write requests to the characteristic: 0xfee1 of the service 0xfee0.

#BMP BADGE SOFTWARE HOW TO#

It’s now time to understand how to control the device manually.įirst, let’s enable the “Bluetooth HCI snoop log” Developer option ( more info on this article) to see what happens under the hood when we send the Hello message: Surprisingly, you don’t need to pair the device to your phone to change the text. When pressing the send button, the app scans for compatible devices and sends data directly.

#BMP BADGE SOFTWARE ANDROID#

The device is shipped with a very simple iOS / Android application that can send up to 8 different messages to the LED badge.įor each message, you can set some options, such as the display mode or the scrolling speed. Unlike what can be seen on the package, I would not recommend using this badge for your hotel employees, especially if you have fun customers.

#BMP BADGE SOFTWARE BLUETOOTH#

I recently bought a Bluetooth LED name badge thinking it could be a nice external screen for some use cases for an Android Things project (such as displaying the device IP, or some short text). While this could lead to some privacy issues, this can sometimes also be a source of fun, especially when trying to understand how a device works, so we can use it in a different way, or on a totally different platform. Security in Bluetooth LE devices is optional, and many cheap products you can find on the market are not secured at all.