The Grove Shield Kit breaks out four of the six i/o connections on the Digispark development board into two Grove system compatible connectors.
One connector is compatible with Grove I2C and Digital modules and the second is compatible with only Digital modules.
They also may be compatible with some analog modules.
This is an unassembled kit and requires basic soldering.
This is designed for use with the Digispark development board, which is not included.
Schematic design of Grove Shield Kit
Instruction and Tutorials of Grove Shield Kit
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