Arduino Uno WiFi board example

examples/ArduinoUnoWiFi/ThingSpeakWriteSingleField_UNOWiFiDevEdSerial1.ino

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+/*
+  This example merges ThingSpeak > Arduino WiFi Shield > WriteSingleField example
+  with UNO WiFi Developer Edition Serial1 > WiFiLinkWebClient example.
+
+  created 19 April 2020
+  by Luigi Russi
+
+*/
+
+/*
+ WiFiLink example: WebClient
+ https://github.com/jandrassy/arduino-library-wifilink
+*/
+
+/*
+  WriteSingleField
+
+  Description: Writes a value to a channel on ThingSpeak every 20 seconds.
+
+  Hardware: Arduino WiFi Shield
+
+  !!! IMPORTANT - Modify the secrets.h file for this project with your network connection and ThingSpeak channel details. !!!
+
+  Note:
+  - Requires the WiFi library
+  - Ensure the WiFi Shield has the latest firmware. Instruction to update can be found here: https://www.arduino.cc/en/Hacking/WiFiShieldFirmwareUpgrading
+  - This example is written for a network using WPA encryption. For WEP or WPA, change the WiFi.begin() call accordingly.
+
+  ThingSpeak ( https://www.thingspeak.com ) is an analytic IoT platform service that allows you to aggregate, visualize, and 
+  analyze live data streams in the cloud. Visit https://www.thingspeak.com to sign up for a free account and create a channel.  
+
+  Documentation for the ThingSpeak Communication Library for Arduino is in the README.md folder where the library was installed.
+  See https://www.mathworks.com/help/thingspeak/index.html for the full ThingSpeak documentation.
+
+  For licensing information, see the accompanying license file.
+
+  Copyright 2018, The MathWorks, Inc.
+*/
+
+#include "ThingSpeak.h"
+//#include <WiFi.h>
+#include "secrets.h"
+
+#include <UnoWiFiDevEdSerial1.h>
+#include "WiFiLink.h"
+
+
+//char ssid[] = SECRET_SSID;   // your network SSID (name) 
+//char pass[] = SECRET_PASS;   // your network password
+//int keyIndex = 0;            // your network key Index number (needed only for WEP)
+
+WiFiClient  client;
+
+unsigned long myChannelNumber = SECRET_CH_ID;
+const char * myWriteAPIKey = SECRET_WRITE_APIKEY;
+
+int number = 0;
+
+void setup() {
+  //Initialize serial and wait for port to open:
+  Serial.begin(115200);
+
+  Serial1.begin(115200);
+  Serial1.resetESP();
+  delay(3000); //wait while WiFiLink firmware connects to WiFi with Web Panel settings
+
+  WiFi.init(&Serial1);
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(10);
+  }
+  Serial.println("You're connected to the network");
+  printWifiStatus();
+  Serial.println();
+
+  //while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo native USB port only
+  //}
+
+//   check for the presence of the shield:
+//  if (WiFi.status() == WL_NO_SHIELD) {
+//    Serial.println("WiFi shield not present");
+//     don't continue:
+//    while (true);
+//  }
+
+//  String fv = WiFi.firmwareVersion();
+//  if (fv != "1.1.0") {
+//    Serial.println("Please upgrade the firmware");
+//  }
+
+  ThingSpeak.begin(client);  // Initialize ThingSpeak
+}
+
+void loop() {
+
+  // Connect or reconnect to WiFi
+//  if(WiFi.status() != WL_CONNECTED){
+//    Serial.print("Attempting to connect to SSID: ");
+//    Serial.println(SECRET_SSID);
+//    while(WiFi.status() != WL_CONNECTED){
+//      WiFi.begin(ssid, pass);
+//      Serial.print(".");
+//      delay(5000);     
+//    } 
+//    Serial.println("\nConnected.");
+//  }
+
+  // Write to ThingSpeak. There are up to 8 fields in a channel, allowing you to store up to 8 different
+  // pieces of information in a channel.  Here, we write to field 1.
+  int x = ThingSpeak.writeField(myChannelNumber, 1, number, myWriteAPIKey);
+  if(x == 200){
+    Serial.println("Channel update successful.");
+  }
+  else{
+    Serial.println("Problem updating channel. HTTP error code " + String(x));
+  }
+
+  // change the value
+  number++;
+  if(number > 99){
+    number = 0;
+  }
+
+  delay(20000); // Wait 20 seconds to update the channel again
+  // Try to play with delay to avoid: "Problem updating channel. HTTP error code 0" message in serial monitor.
+  // See also https://uk.mathworks.com/matlabcentral/answers/483892-thingspeak-http-error-code-0-but-data-is-inserted
+
+}
+
+void printWifiStatus() {
+  // print the SSID of the network you're attached to
+  Serial.print("SSID: ");
+  Serial.println(WiFi.SSID());
+
+  // print your WiFi shield's IP address
+  IPAddress ip = WiFi.localIP();
+  Serial.print("IP Address: ");
+  Serial.println(ip);
+
+  // print the received signal strength
+  long rssi = WiFi.RSSI();
+  Serial.print("Signal strength (RSSI):");
+  Serial.print(rssi);
+  Serial.println(" dBm");
+}

examples/ArduinoUnoWiFi/secrets.h

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+// Use this file to store all of the private credentials 
+// and connection details
+
+#define SECRET_SSID "MySSID"		// replace MySSID with your WiFi network name
+#define SECRET_PASS "MyPassword"	// replace MyPassword with your WiFi password
+
+#define SECRET_CH_ID 0000000			// replace 0000000 with your channel number
+#define SECRET_WRITE_APIKEY "XYZ"   // replace XYZ with your channel write API Key