Specifications

4.0_keyboard

BT/USB Docking Keyboard Electronic Specifications

Basic features

 BT/USB dual modes, switches between two modes automatically

 BT should be compatible with Raspberry Pi 3B+

 Hardware connection will be pogo pins

 Operating system will be pi-top Polaris (Rasbian/linux based)

 Needs 100-200mAh battery, charging via pogo pins

 Pogo pins should contain 5V, USB-, USB+, GND, 1-wire(ID)

 The controller needs a single wire communication through pogo pin

to system MCU

 LED indicators should include charging/BT paring/low

power/mode(potentially)

 No external power button/charging port needed

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4.
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Detail specifications 1. Pogo pin  5V: From system to keyboard for charging.  USB pair: For USB mode.  Single wire: For system MCU can read keyboard’s Bluetooth ID or MAC, any data can let system know which keyboard is connecting. So the OS can pair to the particular keyboard.
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2. USB/BT Modes Swings  When dock pogo connects, keyboard switches to USB mode automatically, and the Bluetooth should stay on but no data transmitting.  When dock pogo disconnects, keyboard should start sending data to system back to use Bluetooth keyboard function, this should be seamless.  When dock pogo connects, keyboard should communicate with system via single wire pin, and send Bluetooth ID to system. 3.
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FCC Warnning: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.