Esp8266 empty response from thingspeak

[nalitnyk]

Hello, have arduino uno + esp8266. Can't read from thingspeak, however writing data to thingspeak works. I got "Failed to read from ThingSpeak". Thanks in advance

#include <SoftwareSerial.h>
#include <DHT.h>
#include <ThingSpeak.h>
#include <ArduinoJson.h>
#include <TFT.h>
#include <SPI.h>

#define RX 2 // ESP8266 RX pin
#define TX 3 // ESP8266 TX pin

String AP = "";          // AP NAME
String PASS = "";                // AP PASSWORD
String API = "";  // Write API KEY
String HOST = "api.thingspeak.com";
String PORT = "80";
String field = "field1";
int countTrueCommand;
int countTimeCommand;
boolean found = false;
int valSensor = 1;


unsigned long READ_CHANNEL_ID = 111111;
const char* READ_API_KEY = "";

SoftwareSerial esp8266(RX, TX);



#define cs   10       // cs pin
#define dc   9        // dc pin
#define rst  8        // reset pin

TFT TFTscreen = TFT(cs, dc, rst); // set pins for display function

DHT dht(7, DHT11); // set pins for Sensor function

void setup() {
  Serial.begin(9600);
  esp8266.begin(115200);
  sendCommand("AT", 5, "OK");
  sendCommand("AT+CWMODE=1", 5, "OK");
  sendCommand("AT+CWJAP=\"" + AP + "\",\"" + PASS + "\"", 20, "OK");
  pinMode(8, INPUT);
  dht.begin(); // run Sensor
  TFTscreen.begin(); // run display

  TFTscreen.background(0, 0, 0); // Clear display
  TFTscreen.setTextSize(2);      // set type
}

void loop() {
  int randomGeneratedValue = random(0, 100);


  // it doesn't
  readFromThingSpeak(READ_CHANNEL_ID, READ_API_KEY);

  // it works
  // sendToThingSpeak(randomGeneratedValue);
  
  // Wait for a few seconds
  delay(5000);
}

void readFromThingSpeak(unsigned long channelID, const char* apiKey) {
  String url = "/channels/" + String(channelID) + "/fields/1.json?api_key=" + apiKey;

  Serial.println("Reading from ThingSpeak: " + url);

  sendCommand("AT+CIPMUX=1", 5, "OK");
  sendCommand("AT+CIPSTART=0,\"TCP\",\"" + HOST + "\"," + PORT, 15, "OK");
  sendCommand("AT+CIPSEND=0," + String(url.length() + 4), 4, ">");
  esp8266.println("GET " + url + " HTTP/1.1");
  delay(1500);
  sendCommand("AT+CIPCLOSE=0", 5, "OK");

  String response = esp8266.readStringUntil('\n');
  Serial.print("length: " + String(response.length()))
  Serial.print("content: " + content)
  if (response.indexOf("OK") != -1) {
    String json = esp8266.readStringUntil('\n');

    DynamicJsonDocument doc(1024);
    deserializeJson(doc, json);

    int value = doc["field1"];
    Serial.println("Value from ThingSpeak: " + String(value));

    TFTscreen.print("Value: ");
    TFTscreen.print(value);
  } else {
    Serial.println("Failed to read from ThingSpeak");
  }
}

void sendCommand(String command, int maxTime, char readReplay[]) {
  Serial.print(countTrueCommand);
  Serial.print(". ");
  Serial.print(command);
  Serial.println(" ");
  Serial.println(" ");
  while(countTimeCommand < (maxTime*1))
  {
    esp8266.println(command);
    if(esp8266.find(readReplay))
    {
      found = true;
      break;
    }

    countTimeCommand++;
  }
  Serial.print(esp8266.readString());

  if(found == true)
  {
    Serial.println("Response is OK");
    countTrueCommand++;
    countTimeCommand = 0;
  }

  if(found == false)
  {
    Serial.println("Response is fail");
    countTrueCommand = 0;
    countTimeCommand = 0;
  }

  found = false;
  delay(1000); 
}

// void sendToThingSpeak(float data) {
//   String url = "GET /update?api_key=" + API + "&" + field + "=" + String(data);

//   Serial.println("Sending to ThingSpeak: " + url);

//   sendCommand("AT+CIPMUX=1", 5, "OK");
//   sendCommand("AT+CIPSTART=0,\"TCP\",\"" + HOST + "\"," + PORT, 15, "OK");
//   sendCommand("AT+CIPSEND=0," + String(url.length() + 4), 4, ">");
//   esp8266.println(url);
//   delay(1500);
//   sendCommand("AT+CIPCLOSE=0", 5, "OK");
// }