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Automatic Band Filter (ABF)
letter keys output lowercase characters
Portable IoT terminals: Unit CardKB v1
M5Stack CardKB v1.1 I2C Mini Keyboard Unit (ATMega8A) cursor: pointerDescription M5Stack CardKB v1. 1 is a card sized QWERTY 50 key PCB matrix keyboard unit for compact text input in embedded projects. The Unit CardKB v1. 1 uses an ATMega8A encoding MCU and outputs key values over I2C, so it works as an I2C mini keyboard for M5Stack Core and compatible host controllers. With the HY2. 0 4P Grove interface, an onboard RGB status LED, Shift Sym Fn key modes, and Arduino UIFlow support, M5Stack CardKB v1. 1 helps M5Stack
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