I'm using FRDM-KW019032 to interface it with external hardware.
Device is running LF/RF Communication KDS3 rev. 1 libraries, provided by NXP, with minor modifications. Power supply is connected in J3.16, also tested in J28, and MKW01 is not sending data via UART0 until external interference (disconnecting and reconnecting UART0's wires). After that, it works perfectly.
While UART0 is working, D17 usually emits green light. FDRM rarely sends data with D17 turned off.
No Resistor or any other component were removed or added to default board.