(sysname='FiPy', nodename='FiPy', release='1.18.1.r7', version='v1.8.6-849-d1c5ea9 on 2018-12-17', machine='FiPy with ESP32', lorawan='1.0.2', sigfox='1.0.1')

FiPy on Expansion3
P21 and P22 connected to provide UART loopback

[1] - uart 'constructor' doesn't accept pins as per online documentation, must use init
[2] - use of object after uart.deinit causes divide by zero panic

[1]

uart = machine.UART(1, baudrate=9600, pins=('P21', 'P22'))
uart.init(baudrate=9600, bits=8, parity=None, stop=1)
uart.write('hello')
5
time.sleep(0.5)
uart.any()
0

0 bytes received, expected 5...

uart = machine.UART(1, baudrate=9600)
uart.init(baudrate=9600, bits=8, parity=None, stop=1, pins=('P21', 'P22'))
uart.write('hello')
5
time.sleep(0.5)
uart.any()
5

5 bytes received as expected

[2]
read or write after deinit causes catastrophic failure

uart.deinit()
uart.any()
0
uart.read(1)
Guru Meditation Error: Core 1 panic'ed (IntegerDivideByZero)
. Exception was unhandled.

Exception