From a77c072cb56de00ca2fa2970925a0597c2a1f8fd Mon Sep 17 00:00:00 2001
From: PopCorn <popcorn@192.168.1.45>
Date: Thu, 13 Nov 2025 15:49:29 +0800
Subject: [PATCH] =?UTF-8?q?modbus=E8=BF=94=E5=9B=9E=E6=95=B0=E6=8D=AE?=
 =?UTF-8?q?=E6=A0=A1=E9=AA=8C?=
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---
 client.go | 48 ++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 40 insertions(+), 8 deletions(-)

diff --git a/client.go b/client.go
index a22e2a5..5e5ebc8 100644
--- a/client.go
+++ b/client.go
@@ -1232,21 +1232,53 @@ func (mc *ModbusClient) readRegistersWithFunctionCode(addr uint16, quantity uint
 	}
 
 	// validate the response code
+	// switch {
+	// case res.functionCode == req.functionCode:
+	// 	// make sure the payload length is what we expect
+	// 	// (1 byte of length + 2 bytes per register)
+	// 	if len(res.payload) != 1+2*int(quantity) {
+	// 		err = ErrProtocolError
+	// 		return
+	// 	}
+
+	// 	// validate the byte count field
+	// 	// (2 bytes per register * number of registers)
+	// 	if uint(res.payload[0]) != 2*uint(quantity) {
+	// 		err = ErrProtocolError
+	// 		return
+	// 	}
+
+	// 	// remove the byte count field from the returned slice
+	// 	bytes = res.payload[1:]
+
+	// case res.functionCode == (req.functionCode | 0x80):
+	// 	if len(res.payload) != 1 {
+	// 		err = ErrProtocolError
+	// 		return
+	// 	}
+
+	// 	err = mapExceptionCodeToError(res.payload[0])
+
+	// default:
+	// 	err = ErrProtocolError
+	// 	mc.logger.Warningf("unexpected response code (%v)", res.functionCode)
+	// }
+
 	switch {
 	case res.functionCode == req.functionCode:
 		// make sure the payload length is what we expect
 		// (1 byte of length + 2 bytes per register)
-		if len(res.payload) != 1+2*int(quantity) {
-			err = ErrProtocolError
-			return
-		}
+		// if len(res.payload) != 1+2*int(quantity) {
+		// 	err = ErrProtocolError
+		// 	return
+		// }
 
 		// validate the byte count field
 		// (2 bytes per register * number of registers)
-		if uint(res.payload[0]) != 2*uint(quantity) {
-			err = ErrProtocolError
-			return
-		}
+		// if uint(res.payload[0]) != 2*uint(quantity) {
+		// 	err = ErrProtocolError
+		// 	return
+		// }
 
 		// remove the byte count field from the returned slice
 		bytes = res.payload[1:]