Add READMEs. Add AssistNow_Online Example1
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PaulZC
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/*
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Use ESP32 WiFi to get AssistNow Online data from u-blox Thingstream
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By: SparkFun Electronics / Paul Clark
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Date: November 24th, 2021
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License: MIT. See license file for more information but you can
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basically do whatever you want with this code.
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This example shows how to obtain AssistNow Online data from u-blox Thingstream over WiFi
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and push it over I2C to a ZED-F9x.
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You will need to have a token to be able to access Thingstream. See the AssistNow README for more details.
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Update secrets.h with your:
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- WiFi credentials
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- AssistNow token string
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Feel like supporting open source hardware?
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Buy a board from SparkFun!
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SparkFun Thing Plus - ESP32 WROOM: https://www.sparkfun.com/products/15663
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ZED-F9P RTK2: https://www.sparkfun.com/products/16481
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SparkFun GPS Breakout - ZOE-M8Q (Qwiic): https://www.sparkfun.com/products/15193
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Hardware Connections:
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Plug a Qwiic cable into the GNSS and a ESP32 Thing Plus
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If you don't have a platform with a Qwiic connection use the SparkFun Qwiic Breadboard Jumper (https://www.sparkfun.com/products/14425)
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Open the serial monitor at 115200 baud to see the output
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*/
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#include <WiFi.h>
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#include <HTTPClient.h>
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#include "secrets.h"
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const char assistNowServer[] = "https://online-live1.services.u-blox.com";
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//const char assistNowServer[] = "https://online-live2.services.u-blox.com"; // Alternate server
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const char getQuery[] = "GetOnlineData.ashx?";
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const char tokenPrefix[] = "token=";
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const char tokenSuffix[] = ";";
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const char getGNSS[] = "gnss=gps,glo;"; // GNSS can be: gps,qzss,glo,bds,gal
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const char getDataType[] = "datatype=eph,alm,aux;"; // Data type can be: eph,alm,aux,pos
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const unsigned long maxTimeBeforeHangup_ms = 10000; //If we fail to get data after 10s, then disconnect
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//=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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#include <SparkFun_u-blox_GNSS_Arduino_Library.h> //http://librarymanager/All#SparkFun_u-blox_GNSS
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SFE_UBLOX_GNSS myGNSS;
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//=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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void setup()
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{
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delay(1000);
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Serial.begin(115200);
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Serial.println("AssistNow Example");
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//=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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// Start I2C. Connect to the GNSS.
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// Wire.begin(); //Start I2C
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//
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// if (myGNSS.begin() == false) //Connect to the Ublox module using Wire port
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// {
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// Serial.println(F("u-blox GPS not detected at default I2C address. Please check wiring. Freezing."));
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// while (1);
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// }
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// Serial.println(F("u-blox module connected"));
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//
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// myGNSS.setI2COutput(COM_TYPE_UBX); //Turn off NMEA noise
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//
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// myGNSS.setNavigationFrequency(1); //Set output in Hz.
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//=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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// Connect to WiFi.
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Serial.print("Connecting to local WiFi");
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WiFi.begin(ssid, password);
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.print(".");
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}
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Serial.println();
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Serial.println("WiFi connected!");
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//=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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// Make the HTTP request
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const int URL_BUFFER_SIZE = 512;
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char theURL[URL_BUFFER_SIZE];
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int payloadSize;
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String payload;
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// Assemble the URL
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snprintf(theURL, URL_BUFFER_SIZE, "%s/%s%s%s%s%s%s",
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assistNowServer,
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getQuery,
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tokenPrefix,
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myAssistNowToken,
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tokenSuffix,
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getGNSS,
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getDataType);
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Serial.print("URL is: ");
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Serial.println(theURL);
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HTTPClient http;
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http.begin(theURL);
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int httpCode = http.GET();
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// httpCode will be negative on error
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if(httpCode > 0)
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{
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// HTTP header has been sent and Server response header has been handled
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Serial.printf("[HTTP] GET... code: %d\n", httpCode);
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// file found at server
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if(httpCode == HTTP_CODE_OK) // Code 200
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{
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payloadSize = http.getSize();
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Serial.printf("Server returned %d bytes\r\n", payloadSize);
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payload = http.getString(); // Get the payload
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// Pretty-print the payload as HEX
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int i;
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for(i = 0; i < payloadSize; i++)
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{
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if (payload[i] < 0x10) // Print leading zero
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Serial.print("0");
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Serial.print(payload[i], HEX);
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Serial.print(" ");
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if ((i % 16) == 15)
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Serial.println();
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}
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if ((i % 16) != 15)
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Serial.println();
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}
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}
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else
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{
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Serial.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());
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}
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http.end();
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//=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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// Push the AssistNow data to the module
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}
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//=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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void loop()
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{
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// Nothing to do here
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}
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@@ -0,0 +1,6 @@
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//Your WiFi credentials
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const char ssid[] = "TRex";
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const char password[] = "hasBigTeeth";
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//Your AssistNow token
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const char myAssistNowToken[] = "58XXXXXXXXXXXXXXXXXXYQ";
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@@ -0,0 +1,55 @@
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# SparkFun u-blox Arduino GNSS Library - AssistNow<sup>TM</sup>
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v2.1.0 of the library adds support for u-blox [AssistNow<sup>TM</sup> Assisted GNSS (A-GNSS)](https://www.u-blox.com/en/product/assistnow) which can dramatically reduce the time-to-first-fix.
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To use AssistNow Online or AssistNow Offline, you will need a token to access the u-blox Thingstream server. See [below](#AssistNow-Service-Token) for details.
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## AssistNow<sup>TM</sup> Online
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With AssistNow Online, an Internet connected host downloads assistance data from the u-blox AssistNow Online service to the receiver at system start-up. AssistNow Online data is valid for 2 - 4 hours; beyond that fresh data must be downloaded.
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Please see the [AssistNow_Online](./AssistNow_Online) examples for more details. These examples were written for the ESP32, but will run on other platforms too.
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## AssistNow<sup>TM</sup> Offline
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With the AssistNow Offline service, users can download long-term orbit data over the Internet at their convenience. The orbit data can be stored in the memory of the application processor. The function requires no connectivity at system start-up, enabling a position fix within seconds, even when no network is available. AssistNow Offline offers augmentation for up to 35 days.
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Please see the [AssistNow_Offline](./AssistNow_Offline) examples for more details. These examples were written for the ESP32, but will run on other platforms too.
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## AssistNow<sup>TM</sup> Autonomous
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AssistNow Autonomous provides aiding information without the need for a host or external network connection. Based on previous broadcast satellite ephemeris data downloaded to and stored by the GNSS receiver, AssistNow Autonomous automatically generates accurate predictions of satellite orbital data (“AssistNow Autonomous data”) that is usable for future GNSS position fixes.
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The benefits of AssistNow Autonomous are:
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* Faster fix in situations where GNSS satellite signals are weak
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* No connectivity required
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* Compatible with AssistNow Online (can work stand-alone, or in tandem with AssistNow Online service)
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* No integration effort; calculations are done in the background, transparent to the user
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AssistNow Autonomous offers augmentation for up to 6 days.
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Please see the [AssistNow_Autonomous](./AssistNow_Autonomous) examples for more details.
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## AssistNow Service Token
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To be able to use AssistNow Online or AssistNow Offline, you will need a token to access the u-blox Thingstream server.
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The following u-blox resources contain useful information:
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* [AssistNow - u-blox A-GNSS services](https://www.u-blox.com/en/product/assistnow)
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* [AssistNow Product Summary](https://www.u-blox.com/sites/default/files/products/documents/AssistNow_ProductSummary_UBX-13003352.pdf)
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* [AssistNow User Guide](https://www.u-blox.com/sites/default/files/products/documents/MultiGNSS-Assistance_UserGuide_%28UBX-13004360%29.pdf)
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* [Thingstream Pricing](https://portal.thingstream.io/pricing)
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You can apply for a _free_ AssistNow Service Evaluation Token by completing the request form:
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* [AssistNow Service evaluation token request form](https://www.u-blox.com/en/assistnow-service-evaluation-token-request-form)
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The _free_ AssistNow Developer token entitles you to:
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* AssistNow Online Developer: 100K free location requests per month. Capped.
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* AssistNow Offline Developer: 20K free location requests per month. Capped.
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* CellLocate Developer: 5K free location requests per month. Capped.
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The free token will expire after 90 days, but you can continue to use it beyond that by registering it on [Thingstream](https://portal.thingstream.io/).
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