Please don't "hardcode" a specififc uart here. Rather make it configurable from the airframe file, e.g.:
```
<makefile target="ap">  
  <file name="hott.c"/>
  <raw>
HOTT_PORT ?= UART1
HOTT_PORT_LOWER=$(shell echo $(HOTT_PORT) | tr A-Z a-z)
HOTT_PORT_UPPER=$(shell echo $(HOTT_PORT) | tr a-z A-Z)
  </raw>
  <define name="HOTT_PORT" value="$(HOTT_PORT_LOWER)"/>
  <define name="USE_$(HOTT_PORT_UPPER)"/>
  <define name="$(HOTT_PORT_UPPER)_BAUD" value="B19200"/>
</makefile>
```
and target should only be "ap"