diff --git a/GITHUB_SHA.h b/GITHUB_SHA.h
index 919895a..98ac27a 100644
--- a/GITHUB_SHA.h
+++ b/GITHUB_SHA.h
@@ -1 +1 @@
-#define GITHUB_SHA "devel-202301290750Z"
+#define GITHUB_SHA "devel-202302121935Z"
diff --git a/LCN.cpp b/LCN.cpp
index efb49ff..d1e1228 100644
--- a/LCN.cpp
+++ b/LCN.cpp
@@ -43,7 +43,7 @@ void LCN::loop() {
   
   while (stream->available()) {
     int ch = stream->read();
-    if (ch >= 0 && ch <= '9') {  // accumulate id value
+    if (ch >= '0' && ch <= '9') {  // accumulate id value
       id = 10 * id + ch - '0';
     }
     else if (ch == 't' || ch == 'T') { // Turnout opcodes
diff --git a/version.h b/version.h
index 3a0fa9e..21c7ad2 100644
--- a/version.h
+++ b/version.h
@@ -4,7 +4,8 @@
 #include "StringFormatter.h"
 
 
-#define VERSION "4.2.16"
+#define VERSION "4.2.17"
+// 4.2.17 LCN bugfix
 // 4.2.16 Move EX-IOExpander servo support to the EX-IOExpander software
 // 4.2.15 Add basic experimental PWM support to EX-IOExpander
 //        EX-IOExpander 0.0.14 minimum required