From 19b6225b25e93cf81dc9433a2ad063eb7745bc93 Mon Sep 17 00:00:00 2001
From: Eveldee <eveldee0680@live.fr>
Date: Mon, 14 Dec 2020 22:00:38 +0100
Subject: [PATCH] Check amount of received data

Fix a bug
---
 WaveshareUARTFingerprintSensor/FingerprintSensor.cs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/WaveshareUARTFingerprintSensor/FingerprintSensor.cs b/WaveshareUARTFingerprintSensor/FingerprintSensor.cs
index b60c9da..c1de856 100644
--- a/WaveshareUARTFingerprintSensor/FingerprintSensor.cs
+++ b/WaveshareUARTFingerprintSensor/FingerprintSensor.cs
@@ -110,7 +110,13 @@ namespace WaveshareUARTFingerprintSensor
                 _serialPort.Write(buffer, 0, buffer.Length);
 
                 // Response
-                _serialPort.Read(buffer, 0, buffer.Length);
+                int length = buffer.Length;
+                int offset = 0;
+                do
+                {
+                    int toRead = length - offset;
+                    offset += _serialPort.Read(buffer, offset, toRead);
+                } while (offset < length);
 
                 if (buffer[0] != PacketSeparator || buffer[7] != PacketSeparator || buffer[1] != (byte)commandType)
                 {