From 981bdc7cd8ce10bca3e53fbc0436f4833e8f1576 Mon Sep 17 00:00:00 2001
From: Tod Kurt <todbot@users.noreply.github.com>
Date: Fri, 11 Oct 2024 16:09:56 -0700
Subject: [PATCH] adafruit_pio_uart.receive() should return None on no bytes
 received (timeout), to match busio.UART

---
 adafruit_pio_uart.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/adafruit_pio_uart.py b/adafruit_pio_uart.py
index 426e90b..0a4f703 100644
--- a/adafruit_pio_uart.py
+++ b/adafruit_pio_uart.py
@@ -184,6 +184,8 @@ def read(self, n):
         else:
             buf = bytearray(n)
         n = self.readinto(buf)
+        if n == 0:
+            return None
         if n < len(buf):
             return buf[:n]
         return buf