AssistNow_Online Example1 is working nicely!

TO DO:
Overload (?) pushAssistNowData so it can accept uint8_t * as the data source, instead of a String.

examples/AssistNow/AssistNow_Online/Example1_AssistNowClient/Example1_AssistNowClient.ino

@@ -6,7 +6,7 @@
   basically do whatever you want with this code.
 
   This example shows how to obtain AssistNow Online data from u-blox Thingstream over WiFi
-  and push it over I2C to a ZED-F9x.
+  and push it over I2C to a u-blox module.
 
   You will need to have a token to be able to access Thingstream. See the AssistNow README for more details.
 
@@ -14,6 +14,9 @@
   - WiFi credentials
   - AssistNow token string
 
+  Uncomment the "#define USE_MGA_ACKs" below to test the more robust method of using the
+  UBX_MGA_ACK_DATA0 acknowledgements to confirm that each MGA message has been accepted.
+
   Feel like supporting open source hardware?
   Buy a board from SparkFun!
   SparkFun Thing Plus - ESP32 WROOM:        https://www.sparkfun.com/products/15663
@@ -26,6 +29,8 @@
   Open the serial monitor at 115200 baud to see the output
 */
 
+//#define USE_MGA_ACKs // Uncomment this line to use the UBX_MGA_ACK_DATA0 acknowledgements
+
 #include <WiFi.h>
 #include <HTTPClient.h>
 #include "secrets.h"
@@ -67,8 +72,6 @@ void setup()
 
   myGNSS.setI2COutput(COM_TYPE_UBX); //Turn off NMEA noise
 
-  myGNSS.setNavigationFrequency(1); //Set output in Hz.
-
   //=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
   // Connect to WiFi.
 
@@ -91,7 +94,8 @@ void setup()
   int payloadSize = 0; // This will be updated with the length of the data we get from the server
   String payload; // This will store the data we get from the server
 
-  // Assemble the URL. Note the slash after assistNowServer
+  // Assemble the URL
+  // Note the slash after the first %s (assistNowServer)
   snprintf(theURL, URL_BUFFER_SIZE, "%s/%s%s%s%s%s%s",
     assistNowServer,
     getQuery,
@@ -114,10 +118,10 @@ void setup()
   if(httpCode > 0)
   {
     // HTTP header has been sent and Server response header has been handled
-    Serial.printf("[HTTP] GET... code: %d\n", httpCode);
+    Serial.printf("[HTTP] GET... code: %d\r\n", httpCode);
   
     // If the GET was successful, read the data
-    if(httpCode == HTTP_CODE_OK) // Code 200
+    if(httpCode == HTTP_CODE_OK) // Check for code 200
     {
       payloadSize = http.getSize();
       Serial.printf("Server returned %d bytes\r\n", payloadSize);
@@ -143,7 +147,7 @@ void setup()
   }
   else
   {
-    Serial.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());
+    Serial.printf("[HTTP] GET... failed, error: %s\r\n", http.errorToString(httpCode).c_str());
   }
   
   http.end();  
@@ -156,8 +160,36 @@ void setup()
     // Enable the 'major' debug messages on Serial so we can see what AssistNow data is being sent
     myGNSS.enableDebugging(Serial, true);
 
-    // Push all the AssistNow data - without checking for UBX-MGA-ACK messages
+#ifndef USE_MGA_ACKs
-    myGNSS.pushAssistNowData((uint8_t *)&payload, (size_t)payloadSize);
+
+    // ***** Don't use the UBX_MGA_ACK_DATA0 messages *****
+
+    // Push all the AssistNow data. Don't use UBX_MGA_ACK_DATA0's. Use the default delay of 7ms between messages.
+    myGNSS.pushAssistNowData(payload, (size_t)payloadSize);
+
+#else
+
+    // ***** Use the UBX_MGA_ACK_DATA0 messages *****
+
+    // Tell the module to return UBX_MGA_ACK_DATA0 messages when we push the AssistNow data
+    myGNSS.setAckAiding(1);
+
+    // Speed things up by setting setI2CpollingWait to 1ms
+    myGNSS.setI2CpollingWait(1);
+
+    // Push all the AssistNow data.
+    // We have called setAckAiding(1) to instruct the module to return MGA-ACK messages.
+    // So, we could set the pushAssistNowData mgaAck parameter to SFE_UBLOX_MGA_ASSIST_ACK_YES.
+    // But, just for giggles, let's use SFE_UBLOX_MGA_ASSIST_ACK_ENQUIRE just to confirm that the
+    // MGA-ACK messages are actually enabled.
+    // Wait for up to 1000ms for each ACK to arrive! 1000ms is a bit excessive... 7ms is nearer the mark.
+    myGNSS.pushAssistNowData(payload, (size_t)payloadSize, SFE_UBLOX_MGA_ASSIST_ACK_ENQUIRE, 1000);
+
+    // Set setI2CpollingWait to 125ms to avoid pounding the I2C bus
+    myGNSS.setI2CpollingWait(125);
+
+#endif
+
   }
 }
 
@@ -165,6 +197,8 @@ void setup()
 
 void loop()
 {
+  // Print the UBX-NAV-PVT data so we can see how quickly the fixType goes to 3D
+  
   long latitude = myGNSS.getLatitude();
   Serial.print(F("Lat: "));
   Serial.print(latitude);

src/SparkFun_u-blox_GNSS_Arduino_Library.cpp

@@ -1075,6 +1075,11 @@ bool SFE_UBLOX_GNSS::checkAutomatic(uint8_t Class, uint8_t ID)
       }
     }
     break;
+    case UBX_CLASS_MGA:
+    {
+      if (packetUBXMGAACK != NULL) result = true;
+    }
+    break;
     case UBX_CLASS_HNR:
     {
       switch (ID)
@@ -1205,6 +1210,11 @@ uint16_t SFE_UBLOX_GNSS::getMaxPayloadSize(uint8_t Class, uint8_t ID)
       }
     }
     break;
+    case UBX_CLASS_MGA:
+    {
+      maxSize = UBX_MGA_ACK_DATA0_LEN;
+    }
+    break;
     case UBX_CLASS_HNR:
     {
       switch (ID)
@@ -3973,7 +3983,7 @@ bool SFE_UBLOX_GNSS::pushRawData(uint8_t *dataBytes, size_t numDataBytes, bool s
 // Check for UBX-MGA-ACK responses if required (if mgaAck is YES or ENQUIRE)
 // Wait for maxWait millis after sending each packet (if mgaAck is NO)
 // Return how many MGA packets were pushed successfully
-uint16_t SFE_UBLOX_GNSS::pushAssistNowData(uint8_t *dataBytes, size_t numDataBytes, sfe_ublox_mga_assist_ack_e mgaAck, uint16_t maxWait)
+uint16_t SFE_UBLOX_GNSS::pushAssistNowData(String dataBytes, size_t numDataBytes, sfe_ublox_mga_assist_ack_e mgaAck, uint16_t maxWait)
 {
   size_t dataPtr = 0; // Pointer into dataBytes
   uint16_t packetsProcessed = 0; // Keep count of how many packets have been processed
@@ -3986,9 +3996,15 @@ uint16_t SFE_UBLOX_GNSS::pushAssistNowData(uint8_t *dataBytes, size_t numDataByt
     uint8_t ackAiding = getAckAiding(maxWait); // Enquire if we should expect Acks
     if (ackAiding == 1)
       checkForAcks = true;
+
+    if ((_printDebug == true) || (_printLimitedDebug == true)) // This is important. Print this if doing limited debugging
+    {
+      _debugSerial->print(F("pushAssistNowData: mgaAck is ENQUIRE. getAckAiding returned "));
+      _debugSerial->println(ackAiding);
+    }
   }
 
-  // If checkForAcks is true, then we need to set up storage for the UBX-MGA-ACK-DATA0 messages and use the callback
+  // If checkForAcks is true, then we need to set up storage for the UBX-MGA-ACK-DATA0 messages
   if (checkForAcks)
   {
     if (packetUBXMGAACK == NULL) initPacketUBXMGAACK(); //Check that RAM has been allocated for the MGA_ACK data
@@ -4001,31 +4017,43 @@ uint16_t SFE_UBLOX_GNSS::pushAssistNowData(uint8_t *dataBytes, size_t numDataByt
     // Start by checking the validity of the packet being pointed to
     bool dataIsOK = true;
 
-    dataIsOK &= dataBytes[dataPtr + 0] == UBX_SYNCH_1; // Check for 0xB5
+    dataIsOK &= (dataBytes[dataPtr + 0] == UBX_SYNCH_1); // Check for 0xB5
-    dataIsOK &= dataBytes[dataPtr + 1] == UBX_SYNCH_2; // Check for 0x62
+    dataIsOK &= (dataBytes[dataPtr + 1] == UBX_SYNCH_2); // Check for 0x62
-    dataIsOK &= dataBytes[dataPtr + 2] == UBX_CLASS_MGA; // Check for class UBX-MGA
+    dataIsOK &= (dataBytes[dataPtr + 2] == UBX_CLASS_MGA); // Check for class UBX-MGA
+    
+    size_t packetLength = ((size_t)dataBytes[dataPtr + 4]) | (((size_t)dataBytes[dataPtr + 5]) << 8); // Extract the length
 
-    size_t packetLength = (size_t)dataBytes[dataPtr + 4] + ((size_t)dataBytes[dataPtr + 5] << 8); // Extract the length
     uint8_t checksumA = 0;
     uint8_t checksumB = 0;
     // Calculate the checksum bytes
     // Keep going until the end of the packet is reached (payloadPtr == (dataPtr + packetLength))
     // or we reach the end of the AssistNow data (payloadPtr == numDataBytes)
-    for (size_t payloadPtr = dataPtr + ((size_t)6); (payloadPtr < (dataPtr + packetLength + ((size_t)6))) && (payloadPtr < numDataBytes); payloadPtr++)
+    for (size_t payloadPtr = dataPtr + ((size_t)2); (payloadPtr < (dataPtr + packetLength + ((size_t)6))) && (payloadPtr < numDataBytes); payloadPtr++)
     {
       checksumA += dataBytes[payloadPtr];
       checksumB += checksumA;
     }
     // Check the checksum bytes
-    dataIsOK &= checksumA == dataBytes[dataPtr + packetLength + ((size_t)6)];
+    dataIsOK &= (checksumA == dataBytes[dataPtr + packetLength + ((size_t)6)]);
-    dataIsOK &= checksumB == dataBytes[dataPtr + packetLength + ((size_t)7)];
+    dataIsOK &= (checksumB == dataBytes[dataPtr + packetLength + ((size_t)7)]);
-    dataIsOK &= (dataPtr + packetLength + ((size_t)8)) <= numDataBytes; // Check we haven't overrun
+
+    dataIsOK &= ((dataPtr + packetLength + ((size_t)8)) <= numDataBytes); // Check we haven't overrun
 
     // If the data is valid, push it
     if (dataIsOK)
     {
       pushRawData((uint8_t *)&dataBytes[dataPtr], packetLength + ((size_t)8)); // Push the data
 
+      if ((_printDebug == true) || (_printLimitedDebug == true)) // This is important. Print this if doing limited debugging
+      {
+        _debugSerial->print(F("pushAssistNowData: packet ID 0x"));
+        if (dataBytes[dataPtr + 3] < 0x10)
+          _debugSerial->print(F("0"));
+        _debugSerial->print(dataBytes[dataPtr + 3], HEX);
+        _debugSerial->print(F(" length "));
+        _debugSerial->println(packetLength);
+      }
+
       if (checkForAcks)
       {
         unsigned long startTime = millis();
@@ -4036,26 +4064,21 @@ uint16_t SFE_UBLOX_GNSS::pushAssistNowData(uint8_t *dataBytes, size_t numDataByt
           if (packetUBXMGAACK->head != packetUBXMGAACK->tail) // Does the MGA ACK ringbuffer contain any ACK's?
           {
             bool dataAckd = true; // Check if we've received the correct ACK
-            dataAckd &= packetUBXMGAACK->data[packetUBXMGAACK->tail].msgId == dataBytes[dataPtr + 3];
+            dataAckd &= (packetUBXMGAACK->data[packetUBXMGAACK->tail].msgId == dataBytes[dataPtr + 3]); // Check if the message ID matches
-            dataAckd &= packetUBXMGAACK->data[packetUBXMGAACK->tail].msgPayloadStart[0] == dataBytes[dataPtr + 6];
+            dataAckd &= (packetUBXMGAACK->data[packetUBXMGAACK->tail].msgPayloadStart[0] == dataBytes[dataPtr + 6]); // Check if the first four data bytes match
-            dataAckd &= packetUBXMGAACK->data[packetUBXMGAACK->tail].msgPayloadStart[1] == dataBytes[dataPtr + 7];
+            dataAckd &= (packetUBXMGAACK->data[packetUBXMGAACK->tail].msgPayloadStart[1] == dataBytes[dataPtr + 7]);
-            dataAckd &= packetUBXMGAACK->data[packetUBXMGAACK->tail].msgPayloadStart[2] == dataBytes[dataPtr + 8];
+            dataAckd &= (packetUBXMGAACK->data[packetUBXMGAACK->tail].msgPayloadStart[2] == dataBytes[dataPtr + 8]);
-            dataAckd &= packetUBXMGAACK->data[packetUBXMGAACK->tail].msgPayloadStart[3] == dataBytes[dataPtr + 9];
+            dataAckd &= (packetUBXMGAACK->data[packetUBXMGAACK->tail].msgPayloadStart[3] == dataBytes[dataPtr + 9]);
 
             if (dataAckd) // Is this the ACK we are looking for?
             {
-              if ((_printDebug == true) || (_printLimitedDebug == true)) // This is important. Print this if doing limited debugging
-              {
-                _debugSerial->print(F("pushAssistNowData: packet ID 0x"));
-                if (dataBytes[dataPtr + 3] < 0x10)
-                  _debugSerial->print(F("0"));
-                _debugSerial->print(dataBytes[dataPtr + 3], HEX);
-              }
               if ((packetUBXMGAACK->data[packetUBXMGAACK->tail].type == (uint8_t)1) && (packetUBXMGAACK->data[packetUBXMGAACK->tail].infoCode == (uint8_t)SFE_UBLOX_MGA_ACK_INFOCODE_ACCEPTED))
               {
                 if ((_printDebug == true) || (_printLimitedDebug == true)) // This is important. Print this if doing limited debugging
                 {
-                  _debugSerial->println(F(" was accepted"));
+                  _debugSerial->print(F("pushAssistNowData: packet was accepted after "));
+                  _debugSerial->print(millis() - startTime);
+                  _debugSerial->println(F(" ms"));
                 }
                 packetsProcessed++;
               }
@@ -4063,7 +4086,7 @@ uint16_t SFE_UBLOX_GNSS::pushAssistNowData(uint8_t *dataBytes, size_t numDataByt
               {
                 if ((_printDebug == true) || (_printLimitedDebug == true)) // This is important. Print this if doing limited debugging
                 {
-                  _debugSerial->print(F(" was _not_ accepted. infoCode is "));
+                  _debugSerial->print(F("pushAssistNowData: packet was _not_ accepted. infoCode is "));
                   _debugSerial->println(packetUBXMGAACK->data[packetUBXMGAACK->tail].infoCode);
                 }
               }
@@ -4079,16 +4102,14 @@ uint16_t SFE_UBLOX_GNSS::pushAssistNowData(uint8_t *dataBytes, size_t numDataByt
         {
           if ((_printDebug == true) || (_printLimitedDebug == true)) // This is important. Print this if doing limited debugging
           {
-            _debugSerial->print(F("pushAssistNowData: packet ID 0x"));
+            _debugSerial->println(F("pushAssistNowData: packet ack timed out!"));
-            if (dataBytes[dataPtr + 3] < 0x10)
-              _debugSerial->print(F("0"));
-            _debugSerial->print(dataBytes[dataPtr + 3], HEX);
-            _debugSerial->println(F(" timed out!"));
           }
         }
       }
       else
       {
+        // We are not checking for Acks, so let's assume the send was successful?
+        packetsProcessed++;
         // We are not checking for Acks, so delay for maxWait millis unless we've reached the end of the data
         if ((dataPtr + packetLength + ((size_t)8)) < numDataBytes)
         {
@@ -4114,6 +4135,12 @@ uint16_t SFE_UBLOX_GNSS::pushAssistNowData(uint8_t *dataBytes, size_t numDataByt
     }
   }
 
+  if ((_printDebug == true) || (_printLimitedDebug == true)) // This is important. Print this if doing limited debugging
+  {
+    _debugSerial->print(F("pushAssistNowData: packetsProcessed: "));
+    _debugSerial->println(packetsProcessed);
+  }
+
   return (packetsProcessed);
 }
 
@@ -5615,7 +5642,7 @@ bool SFE_UBLOX_GNSS::setAckAiding(uint8_t ackAiding, uint16_t maxWait) // Set th
 
   // There are three versions of UBX-CFG-NAVX5 but the ackAid flag is always in bit 10 of mask1
   payloadCfg[2] = 0x00; // Clear the LS byte of mask1
-  payloadCfg[3] = 0x40; // Set _only_ the ackAid flag = bit 10 of mask1 = bit 2 of the MS byte
+  payloadCfg[3] = 0x04; // Set _only_ the ackAid flag = bit 10 of mask1 = bit 2 of the MS byte
   payloadCfg[4] = 0x00; // Clear the LS byte of mask2, just in case
   payloadCfg[5] = 0x00; // Clear the LS byte of mask2, just in case
 

src/SparkFun_u-blox_GNSS_Arduino_Library.h

@@ -708,8 +708,8 @@ public:
 	// Check for UBX-MGA-ACK responses if required (if mgaAck is YES or ENQUIRE)
 	// Wait for maxWait millis after sending each packet (if mgaAck is NO)
 	// Return how many MGA packets were pushed successfully
-	#define defaultMGAdelay 10 // Default to waiting for 10ms between each MGA message
+	#define defaultMGAdelay 7 // Default to waiting for 7ms between each MGA message
-	uint16_t pushAssistNowData(uint8_t *dataBytes, size_t numDataBytes, sfe_ublox_mga_assist_ack_e mgaAck = SFE_UBLOX_MGA_ASSIST_ACK_NO, uint16_t maxWait = defaultMGAdelay);
+	uint16_t pushAssistNowData(String dataBytes, size_t numDataBytes, sfe_ublox_mga_assist_ack_e mgaAck = SFE_UBLOX_MGA_ASSIST_ACK_NO, uint16_t maxWait = defaultMGAdelay);
 
 	// Support for data logging
 	void setFileBufferSize(uint16_t bufferSize); // Set the size of the file buffer. This must be called _before_ .begin.