Report SD CS Pin in event of failure

Author: tyeth

src/Wippersnapper_V2.cpp

@@ -96,10 +96,14 @@ void Wippersnapper_V2::provision() {
   if (WsV2._sdCardV2->isSDCardInitialized()) {
     return; // SD card initialized, cede control back to loop()
   } else {
+    uint8_t cspin = WsV2.pin_sd_cs;
+    if (cspin == 255) {
+      // No CS pin found in config.json, so we've used the default
+      cspin = SD_CS_PIN;  
+    }
     haltErrorV2("SD initialization failed.\nDo not reformat the card!\nIs the "
                 "card correctly inserted?\nIs there a wiring/soldering "
-                "problem\nIs the config.json file malformed?");
-    // SD card not initialized, so just continue with online-mode provisioning
+                "problem\nIs the config.json file malformed?\nSD CS Pin: " + String(cspin));
   }
 
 #ifdef USE_DISPLAY