Uno with Sparkfun's ESP8266 Shield

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This worked for me from the example code, make sure you update the EspSerial Ports to (8, 9) for the SparkFun Software Serial:

#define BLYNK_PRINT Serial    // Comment this out to disable prints and save space
#include <ESP8266_SoftSer.h>
#include <BlynkSimpleShieldEsp8266_SoftSer.h>

// Set ESP8266 Serial object
#include <SoftwareSerial.h>
SoftwareSerial EspSerial(8, 9); // RX, TX

ESP8266 wifi(EspSerial);

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "code";

void setup()
{
  // Set console baud rate
  Serial.begin(9600);
  delay(10);
  // Set ESP8266 baud rate
  // 9600 is recommended for Software Serial
  EspSerial.begin(9600);
  delay(10);

  Blynk.begin(auth, wifi, "name", "pw");
}

void loop()
{
  Blynk.run();
}
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