The ElectroSeed SamD21 WB USB board offers 36 USB inputs/outputs, including 14 analog inputs. 4 analog inputs have pull-up resistors, which allows direct connection of bodacs, thus adding the possibility of connecting 20 additional buttons.
The 5v is available around the serial port to connect a Nextion screen or a 7-segment display. The 5v is also exposed to connect RGB leds. Screen and leds are managed with SimHub software.
The following connectors are also proposed :
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A 4-pin JST 2.0 connector to easily connect an aviation connector.
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A USB-C connector to program the board or connect a USB extension.
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A 2-pin JST 2.0 connector with 5v to power permanently button leds for example.
If you choose a customized firmware option, NodeBlue package is included with the board, so you can have any configuration you need. A configuration form will be sent after your order, so you can specify the desired programming. The board will be programmed accordingly and the wiring schematics will be provided. You can check here if your configuration is possible.