ESP8266 Community Forum

Posted: **Mon Jan 09, 2017 10:09 pm**

Hi guys,
I'm using ESP8266 nodeMCU to send data to nodeJS server each 5s, after that, the ESP go to sleep to save power.
The code work great without deepSleep mode. I mean if I put the ESP to sleep, it only send data 1 time, then sleep. After 5s, it's awake and print out some thing wierd with the red led is on, and then ESP stunned!
This is my code:

Code: Select all

/*
 *  This sketch sends data via HTTP GET requests to data.sparkfun.com service.
 *
 *  You need to get streamId and privateKey at data.sparkfun.com and paste them
 *  below. Or just customize this script to talk to other HTTP servers.
 *
 */

#include <ESP8266WiFi.h>

const char* ssid     = "Phong KGHT CDIO";
const char* password = "pCDIO201609";

const char* host = "192.168.100.3";
const char* streamId   = "....................";
const char* privateKey = "....................";

void setup() {
  pinMode(LED_BUILTIN, OUTPUT);
  Serial.begin(115200);
  delay(10);

  // We start by connecting to a WiFi network

  Serial.println();
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  
  WiFi.begin(ssid, password);
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("WiFi connected");  
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

int value = 0;

void loop() {
  Serial.println("Awaked!");
  delay(500);
  digitalWrite(LED_BUILTIN, LOW);
  Serial.print("connecting to ");
  Serial.println(host);
  // Use WiFiClient class to create TCP connections
  WiFiClient client;
  const int httpPort = 3000;
  if (!client.connect(host, httpPort)) {
    Serial.println("connection failed");
    return;
  }
  // We now create a URI for the request
  String url = "/sensor/";
  url += "26";
  url += "/";
  url += "30";
  
  Serial.print("Requesting URL: ");
  Serial.println(url);
  
  // This will send the request to the server
  client.print(String("GET ") + url + " HTTP/1.1\r\n" +
               "Host: " + host + "\r\n" + 
               "Connection: close\r\n\r\n");
  digitalWrite(LED_BUILTIN, HIGH);
  Serial.println("Entering deep sleep");
  ESP.deepSleep(5000000, WAKE_RF_DEFAULT);
  delay(500);
}

And this is what ESP responsed to Serial Monitor:

Code: Select all

Connecting to Phong KGHT CDIO
......
WiFi connected
IP address: 
192.168.100.6
Awaked!
connecting to 192.168.100.3
Requesting URL: /sensor/26/30
Entering deep sleep
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I've try to connect GPIO 16 to RST but after that, the ESP reacted so strange. The red and blue light keep flashing and no response.

Please help me

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