dev-tests/test-allow-missing-uart.py

@@ -0,0 +1,25 @@
+from pybricks.iodevices import UARTDevice as _UARTDevice
+from pybricks.tools import wait
+from uerrno import ETIMEDOUT
+
+class FakeUART:
+    def __init__(self, port, baudrate, timeout):
+        self.timeout = timeout
+        print("Warning: No physical UART detected. Using simulator.")
+
+    def read(self, length=1):
+        if self.timeout is not None:
+            wait(self.timeout)
+            raise OSError(ETIMEDOUT)
+        else:
+            while True:
+                wait(1000)
+
+    def write(self, data):
+        pass
+
+def UARTDevice(port, baudrate=9600, timeout=None):
+    try:
+        return _UARTDevice(port, baudrate, timeout)
+    except OSError:
+        return FakeUART(port, baudrate, timeout)