Today, Tom has built a simple program for using a Matrix keypad over I2C. Ihe I2C port expander used is an MCP23017, with the columns connected on GPB0-2, and the rows connected on GPB4-7.
Today, Tom has built a simple program for using a Matrix keypad over I2C. Ihe I2C port expander used is an MCP23017, with the columns connected on GPB0-2, and the rows connected on GPB4-7.
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