Connecting Lilygo T-call to Blynk: Connecting to ny3.blynk.cloud:80

Solved
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It’s a while since I used a TTGO T-CALL and when I did it was using Blynk Legacy with a TTGO board that said “BLYNK_V1.3” on it. Not sure if this is the same as yours.

This is my old Legacy code with few changes that should allow it to function with Blynk IoT, but I’m away from home at the moment and don’t have any hardware here that would allow me to test it.

#define BLYNK_TEMPLATE_ID "REDACTED"
#define BLYNK_TEMPLATE_NAME "REDACTED"
#define BLYNK_AUTH_TOKEN "REDACTED"

#define BLYNK_PRINT Serial    
#define BLYNK_HEARTBEAT 30
#define TINY_GSM_MODEM_SIM800

#include <TinyGsmClient.h>
#include <BlynkSimpleTinyGSM.h>

#include <Wire.h>
#include "utilities.h"

// TTGO T-Call pin definitions
#define MODEM_RST            5
#define MODEM_PWKEY          4
#define MODEM_POWER_ON       23
#define MODEM_TX             27
#define MODEM_RX             26
#define I2C_SDA              21
#define I2C_SCL              22

// Set serial for debug console (to the Serial Monitor, default speed 115200)
#define SerialMon Serial

// Hardware Serial on TTGO Call
#define SerialAT Serial1

const char apn[]  = "TM";
const char user[] = "";
const char pass[] = "";

TinyGsm modem(SerialAT);

void setup()
{
  // Set console baud rate
  SerialMon.begin(115200);
  delay(10);

  // Keep power when running from battery
  Wire.begin(I2C_SDA, I2C_SCL);
  bool   isOk = setPowerBoostKeepOn(1);
  SerialMon.println(String("IP5306 KeepOn ") + (isOk ? "OK" : "FAIL"));

  // Set-up modem reset, enable, power pins
  pinMode(MODEM_PWKEY, OUTPUT);
  pinMode(MODEM_RST, OUTPUT);
  pinMode(MODEM_POWER_ON, OUTPUT);

  digitalWrite(MODEM_PWKEY, LOW);
  digitalWrite(MODEM_RST, HIGH);
  digitalWrite(MODEM_POWER_ON, HIGH);

  // Set GSM module baud rate and UART pins
  SerialAT.begin(115200, SERIAL_8N1, MODEM_RX, MODEM_TX);
  delay(3000);

  // Restart takes quite some time
  // To skip it, call init() instead of restart()
  SerialMon.println("Initializing modem...");
  modem.restart();

  String modemInfo = modem.getModemInfo();
  SerialMon.print("Modem: ");
  SerialMon.println(modemInfo);

  // Unlock your SIM card with a PIN
  //modem.simUnlock("1234");

   SerialMon.print("Waiting for network...");
  if (!modem.waitForNetwork(240000L)) {
    SerialMon.println(" fail");
    delay(5000);
    return;
  }
  SerialMon.println(" OK");

  if (modem.isNetworkConnected()) {
    SerialMon.println("Network connected");
  }

  SerialMon.print(F("Connecting to APN: "));
  SerialMon.print(apn);
  if (!modem.gprsConnect(apn, user, pass)) {
    SerialMon.println(" fail");
    delay(5000);
    return;
  }
  SerialMon.println(" OK");

  Blynk.config (modem, BLYNK_AUTH_TOKEN, "lon1.blynk.cloud", 80);
  Blynk.connect();
}

BLYNK_CONNECTED()
{
  SerialMon.println("Blynk Connected");
}

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

this is the utilities.h file…

#define IP5306_ADDR          0x75
#define IP5306_REG_SYS_CTL0  0x00

bool setPowerBoostKeepOn(int en)
{
  Wire.beginTransmission(IP5306_ADDR);
  Wire.write(IP5306_REG_SYS_CTL0);
  if (en) {
    Wire.write(0x37); // Set bit1: 1 enable 0 disable boost keep on
  } else {
    Wire.write(0x35); // 0x37 is default reg value
  }
  return Wire.endTransmission() == 0;
}

No idea if this will work for your hardware, and as I’ve said its untested on Blynk IoT

Pete.