Add 2nd try if failure (because u-center does)

Author: nseidle

keywords.txt

@@ -164,6 +164,7 @@ addCfgValset32	KEYWORD2
 sendCfgValset8	KEYWORD2
 sendCfgValset16	KEYWORD2
 sendCfgValset32	KEYWORD2
+downloadDeviceConfig	KEYWORD2
 
 getNAVPOSECEF	KEYWORD2
 setAutoNAVPOSECEF	KEYWORD2

src/SparkFun_u-blox_GNSS_Arduino_Library.cpp

@@ -5219,26 +5219,41 @@ uint8_t SFE_UBLOX_GNSS::sendCfgValset8(uint32_t key, uint8_t value, uint16_t max
 //Layer number can be 0 (RAM) or layer 7 (Default)
 void SFE_UBLOX_GNSS::downloadDeviceConfig(Stream &downloadPort, uint8_t layerNumber, uint16_t maxWait)
 {
-  for (int x = 0 ; x < 18 ; x++)
+  for (int x = 0; x < 18; x++)
   {
-    getVal(0x0FFF0000, layerNumber, x * 64, maxWait); //Advance by 64 keys each time
+    //KeyID of 0x0FFF0000 is magic config read key. Found using u-center and downloading Receiver Configuration from Tools menu.
+    //Advance by 64 keys each time
+    if (getVal(0x0FFF0000, layerNumber, x * 64, maxWait) != SFE_UBLOX_STATUS_SUCCESS)
+    {
+      //Try again
+      if (getVal(0x0FFF0000, layerNumber, x * 64, maxWait) != SFE_UBLOX_STATUS_SUCCESS)
+      {
+        if (_printDebug == true)
+        {
+          _debugSerial->println(F("downloadDeviceConfig: Failed to obtain config data."));
+        }
+      }
+    }
 
     //All lines start with a VALGET
     downloadPort.print(F("CFG-VALGET - 06 8B "));
 
     //Pretty print the response length
     uint16_t responseLength = packetCfg.len;
-    if ((responseLength & 0xFF) < 0x10) downloadPort.print(F("0"));
+    if ((responseLength & 0xFF) < 0x10)
+      downloadPort.print(F("0"));
     downloadPort.print(responseLength & 0xFF, HEX);
     downloadPort.print(F(" "));
-    if ((responseLength >> 8) < 0x10) downloadPort.print(F("0"));
+    if ((responseLength >> 8) < 0x10)
+      downloadPort.print(F("0"));
     downloadPort.print(responseLength >> 8, HEX);
 
     //Pretty print the payload
-    for (int x = 0 ; x < 32 ; x++)
+    for (int x = 0; x < 32; x++)
     {
       downloadPort.print(F(" "));
-      if (payloadCfg[x] < 0x10) downloadPort.print(F("0"));
+      if (payloadCfg[x] < 0x10)
+        downloadPort.print(F("0"));
       downloadPort.print(payloadCfg[x], HEX);
     }
     downloadPort.println();