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Add in_waiting property to busio.UART #1104

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Merged
makermelissa merged 1 commit into from
Apr 15, 2026
+16 −0
Merged

Add in_waiting property to busio.UART #1104

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5 changes: 5 additions & 0 deletions src/adafruit_blinka/microcontroller/rp2040/uart.py
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Original file line number Diff line number Diff line change
Expand Up @@ -50,3 +50,8 @@ def readline(self):
def write(self, buf):
"""Write to the UART from a buffer"""
return self._uart.write(buf)

@property
def in_waiting(self):
"""The number of bytes in the input buffer, available to be read"""
return self._uart.any()
11 changes: 11 additions & 0 deletions src/busio.py
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Original file line number Diff line number Diff line change
Expand Up @@ -628,3 +628,14 @@ def readline(self):
def write(self, buf):
"""Write to the UART from a buffer"""
return self._uart.write(buf)

@property
def in_waiting(self):
"""The number of bytes in the input buffer, available to be read"""
# Custom UART implementations (e.g. RP2040) that provide in_waiting directly
if hasattr(self._uart, "in_waiting"):
return self._uart.in_waiting
# MicroPython's machine.UART uses any() for the same purpose
if hasattr(self._uart, "any"):
return self._uart.any()
raise NotImplementedError("in_waiting not supported on this platform")
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