![]() By itself, this module isn't HID capable. ![]() This cheaper module is the HC-05 and sells for around $3 on ebay. The flashing process of the HC-05 itself takes no longer than a minute after we have extracted the firmware from the RN-42 once. It may look like there's a lot of steps below, but it's actually just a very thorough guide. With a bit of a firmware hack though, we can turn this cheaper module into a bluetooth HID module. An inexpensive bluetooth serial module commonly used by hobbyists, the HC-05, sells for $3 USD, but is not HID capable by default. If we're looking to build our own bluetooth HID device, the hefty price of a single HID module can spike the budget of a project (like the BlueSMiRF HID for $40 USD, or the BlueFruit EZ-KEY HID for $20 USD). ![]() Bluetooth HID (human interface device) modules will let you create bluetooth peripherals that can pair with mobile devices out-of-the-box (like bluetooth keyboards, gamepads, mice, etc.). ![]()
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