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Another is that there's no error checking or bi-directional link - that means the remote doesn't know if the module received the message or not
Useful spec: 3
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What can I show on this display
CP2102: onboard USB TO UART chip
MCP23017 I2C 16-Input/Output Port Expander 2305 Another is that there's noAdd another 16 pins to your microcontroller using a MCP23017 port expander. The MCP23017 uses two i2c pins (these can be shared with other i2c devices), and in exchange gives you 16 general purpose pins. You can set each of 16 pins to be input, output, or input with a pullup. There's even the ability to get an interrupt via an external pin when any of the inputs change so you don't have to keep polling the chip. Use this chip from 2. 7 5. 5V (good for
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