The TIDA-01212 reference design provides a ultra-low power yet simple and low-cost solution for adding a bi-directional IrDA PHY link at 9600 bps to any Smart Metering or sub-metering device. Using a single IR LED: a resistor and internal 1.27 V reference: controlled by an optimized software inside the Sensor Controller engine: both transmitter and receiver for IrDA PHY @ 9600 bps is implemented. This design approach can be used with the TI CC13xx and CC26xx SimpleLink™ Wireless MCUs to reduce cost by replacing legacy optical IrDA PHY modules with two separate LEDs.