1-Wire bus implementation in PIC18F series for Parallax ColorPAL #28380 sensors
First of all, you shouldn't use a UART because it's an Open-Collector interface - the pin used for the serial data should never be driven high. It should be set to tri-stated (high-impedance input) to transmit a "one" bit and set to an output driven low to transmit a "zero" bit, and this data should be sent at a prescribed baud rate. I'm pretty confident that any UART by itself will drive the signal both high and low. So if you want to use a UART to implement this interface, you need to introduce some external hardware. The following circuit is taken from an Atmel app-note:



I think the module you've linked to provides the (equivalent of) the 4.7kOhm pullup, but it's hard to say.