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Photo 01: From the photo, PFU HAPPY HACKING KEYBOARD PD-KB420B, East Play Realforce 91U, R3HC22 keatop.It seems to have the same shape
R3HC22 can be built in two AA batteries for Bluetooth.However, at the time of USB connection, it can only operate by power supply from the USB side, and there is no need to put a battery even if it is connected to Bluetooth.This is a big advantage.First, battery devices always need to manage the remaining amount, which is troublesome.The other is the liquid leakage of the battery.Domestic batteries are less than in the past, but if you forget to put batteries, they may be rusted by liquid leakage.In this regard, I am grateful that it can work without the battery.
Bluetooth can connect up to four units, and can be switched with a combination of FN keys and numeric keys 1 to 4.You can freely set the Bluetooth device name to advertise during pairing, and then add "1" to "4" behind.In addition, R3 Software can record the device name of the connection destination.With this consideration, you do not need to learn which computer paired which number was paired.In the past, I used a number of Bluetooth keyboards that could be connected to multiple computers, but if I didn't use it a little, I would forget the correspondence, so I had to put a sticker on the keyboard.
Another thing that seems to be "Yokatta" is that the side of the back side is flat, and it can be set up here.I don't know if it was designed with the most consciousness.
Key map replacement
If you use R3 software, you can change the output code (USB HID USAGE) when you press the key (Photo 02).Since this is recorded inside the keyboard, you can use a customized keymap without a dedicated software.
In the case of a key map replacement, the two arrays when the normal state and the FN key are pressed can be registered as two patterns, A and B.Since the switch between A and B can be performed on a keyboard, one of the patterns can be assigned for non -PC devices.You can specify the USAGE to be assigned by a hexadecimal (0x00 to 0xdf).This is called user prison.Although there is no detailed explanation, it is probably defined by the USB HID keyboard/keypad page usage ID in numerical values.The USB HID defines various keys and buttons in 32 -bit USage.The usage is divided into the top 16 -bit Page and the lower 16 -bit USAGE ID.The usage is defined in the following documents:
·USB.Org Hid usage tableshttps: // www.USB.Org/SITES/DEFAULT/Files/Documents/Hut1_12V2.pdf
The key code prepared as a multimedia key with a key map replacement function includes AC Home (the Application Control Home of the USAGE ID. It is equivalent to the home screen key on Android and Chromebook), but "return" (the same AC "(the same AC."Some keys such as Back) and "Going" (AC Forward) are not defined.Since this is a Consumer Page usage, it does not seem to be compatible with a user prison that defines a USAGE ID assuming a keyboard/keypad page.This area seems to be a purely software problem.This is because it is hard to think of a hardware reason why AC Forward/Back is not assigned to assign AC Home.It may be a simple "forgetting".I would like to expect this to upgrade this in the future.
I have been touching R3HC22 for the past month, but at least the use of the desktop has no noticeable problems and is generally a good impression.Unfortunately, I haven't been out of the corona, and I rarely appreciate the use on the go.The same electrostatic capacity -free 91U has been playing 91Us since 2006-7, for over 10 years, but there is no problem.The R3HC22, which uses the same key switch, seems to be uneasy in terms of durability.
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