diff --git a/lib/TelnetSpy/TelnetSpy.cpp b/lib/TelnetSpy/TelnetSpy.cpp
index c0d619c..e794597 100644
--- a/lib/TelnetSpy/TelnetSpy.cpp
+++ b/lib/TelnetSpy/TelnetSpy.cpp
@@ -545,7 +545,13 @@ void TelnetSpy::handle() {
 		return;
 	}
 	if (!listening) {
-		if (WiFi.status() != WL_CONNECTED) {
+
+    wifi_mode_t currentMode = WiFi.getMode();
+    bool isAPEnabled = ((currentMode & WIFI_MODE_AP) != 0);
+    bool isSTAconnected = WiFi.status() == WL_CONNECTED;
+
+//		if (WiFi.status() != WL_CONNECTED && !isAPEnabled) {
+		if (!isSTAconnected && !isAPEnabled) {
 			return;
 		}
 		telnetServer = new WiFiServer(port);
diff --git a/src/Afterburner.cpp b/src/Afterburner.cpp
index 0917303..07490b4 100644
--- a/src/Afterburner.cpp
+++ b/src/Afterburner.cpp
@@ -1043,7 +1043,8 @@ bool validateFrame(const CProtocol& frame, const char* name)
 
 int requestOn(bool checkTemp)
 {
-  if(bHasHtrData && (0 == SmartError.checkVolts(FilteredSamples.FastipVolts.getValue(), FilteredSamples.FastGlowAmps.getValue()))) {
+  bool LVCOK = SmartError.checkVolts(FilteredSamples.FastipVolts.getValue(), FilteredSamples.FastGlowAmps.getValue()) != 2;
+  if(bHasHtrData && LVCOK) {
     RTC_Store.setCyclicEngaged(true);    // for cyclic mode
     RTC_Store.setFrostOn(false);  // cancel frost mode
     if(!preemptCyclicMode()) {    // only start if below cyclic threshold when enabled
diff --git a/src/Protocol/SmartError.cpp b/src/Protocol/SmartError.cpp
index 9b5bba6..a3daea3 100644
--- a/src/Protocol/SmartError.cpp
+++ b/src/Protocol/SmartError.cpp
@@ -130,8 +130,12 @@ CSmartError::checkVolts(float ipVolts, float glowI, bool throwfault)
   // Native NV values here are x10 integers
 
   // loom compenstaion, allow 1V drop for 10A current (bit naive but better than no compensation)
-  float cableComp = glowI * 0.1;             
-  float threshLVC = NVstore.getHeaterTuning().getLVC() - cableComp;  // NVstore
+  float cableComp = glowI * 0.1;     
+  float usrLVC = NVstore.getHeaterTuning().getLVC();     
+  if(usrLVC == 0) {
+    return 0;
+  }
+  float threshLVC = usrLVC - cableComp;  // NVstore
   
   // test low voltage cutout
   if(ipVolts < threshLVC) {
@@ -144,6 +148,7 @@ CSmartError::checkVolts(float ipVolts, float glowI, bool throwfault)
 
   // warning threshold
   float threshWarn = threshLVC + 0.5;   // nominally create a warning threshold, 0.5V over LVC threhsold
+/*  
   float alertlimit;                     // but always introduce it if below system voltage
   if(NVstore.getHeaterTuning().sysVoltage == 120) {
     alertlimit = 12.0 - cableComp;
@@ -154,6 +159,7 @@ CSmartError::checkVolts(float ipVolts, float glowI, bool throwfault)
   if(threshWarn < alertlimit) {
     threshWarn = alertlimit;
   }
+*/
 
   if(ipVolts < threshWarn) {
     return 1;  // LVC OK, but below warning threshold, return code = 1
diff --git a/src/Utility/BoardDetect.cpp b/src/Utility/BoardDetect.cpp
index ffb6c47..790857d 100644
--- a/src/Utility/BoardDetect.cpp
+++ b/src/Utility/BoardDetect.cpp
@@ -56,8 +56,9 @@
 //      unmodified V2.0    LOW       HIGH      LOW     - digital only (V2 PCB)
 //      modified   V2.0    LOW       LOW       HIGH    - full GPIO (V2 or V3 PCB)
 //                 V2.1    LOW       LOW       HIGH    - digital only (modified V2 PCB)
-//         No GPIO V2.0    HIGH      LOW       HIGH    - no GPIO (V2 or V3 PCB, 0R in C6) 
+//         No GPIO V2.0    HIGH      LOW       HIGH    - no GPIO (V2 PCB, 0R in C6) 
 //                 V2.1    LOW       LOW       LOW     - digital only (V3 PCB, 0R in C6)
+//         No GPIO V3.x    HIGH      HIGH      LOW     - no GPIO (V3.x PCB, 0R in C6)
 //
 //
 //  ****************************************************************************************
@@ -125,6 +126,11 @@ int BoardDetect()
     revision = BRD_V2_NOGPIO;
     DebugPort.println("Board detect: digital input test reveals V2.2 PCB - no GPIO (V2.0 userID) ");
   }
+  // V3.x PCB, pin 33 grounded via 0R instead of 100n cap, digio transistors not fitted dig in pins pull high
+  else if((pin33 == LOW) && (pin26 == HIGH) && (pin25 == HIGH)) {  
+    revision = BRD_V2_NOGPIO;
+    DebugPort.println("Board detect: digital input test reveals V3.x PCB - no GPIO (V2.0 userID) ");
+  }
   // modified V2 PCB or new V2.1PCB, pins 25 & 33 swapped, Alg routed to usuable pin 33 // cap, dig inputs pulled low by transistors
   else if((pin33 == HIGH) && (pin26 == LOW) && (pin25 == LOW)) {   
     revision = BRD_V2_FULLGPIO;