nodeMCU client stops responding after a few days
Posted: Thu Oct 12, 2017 5:39 pmBelow is my code for a sketch that includes multiple GET and a POST request to my server in order to operate a temperature controller with a relay. After a few days, the nodeMCU just stops posting the temperature to the server.
Code: Select all
#include <ESP8266WiFi.h>
#include <ArduinoJson.h>
#include <DallasTemperature.h>
#include <OneWire.h>
#include <TextFinder.h>
#include <String.h>
//include this library for MAC address reassigning. (For Hotel WiFi)
extern "C" {
#include <user_interface.h>
}
//Use this to reassign mac address of the ESP8266 (Hotel WiFi)
bool wifi_set_macaddr(uint8 if_index, uint8 *macaddr);
// Data wire is plugged into pin 2
#define ONE_WIRE_BUS D1
//Pass oneWire intance to communicate with any oneWire devices
OneWire oneWire(ONE_WIRE_BUS);
//Pass oneWire reference to Dallas Temperature
DallasTemperature sensors(&oneWire);
WiFiClient client;
TextFinder finder( client );
const char* ssid = "ATT6VMY3cI";
const char* password = "6de7yde5umi3";
const char* host = "www.smallbatchbru.com"; // Your domain
bool debugging = true; //whether or not we want to print to the serial port
float f; //current fermentation temp
int setVal; //the value retrieved from setFromSQL.html and desired temp
int highDifference = 2;//desired high and low temp range
int lowDifference = 2;
unsigned long compDelay = 600000; //compressor delay in milliseconds
unsigned long lightLastOff = 0; // used in compressor delay timer
int outOfRange = 70; //Used for sending the email through IFTTT if the temp gets too high inside
int relayPin = D2; //the relay
bool executed = false; //keep track of the sendEmail function to only run once
void setup() {
digitalWrite(D1, HIGH);
pinMode(D1, OUTPUT);
Serial.begin(115200);
pinMode(D4, OUTPUT);
pinMode(relayPin, OUTPUT);
// Start with the built-in LED off
pinMode(LED_BUILTIN, OUTPUT);
digitalWrite(LED_BUILTIN, HIGH);
delay(50);
// Start up the library for the sensor
sensors.begin();
delay(50);
//Reassign the MAC address to my iPhone address (for Hotel WiFi)
//uint8_t mac[6] {0x7c, 0x04, 0xd0, 0x17, 0x23, 0x6F};
//wifi_set_macaddr(STATION_IF, mac);
//WiFi.hostname("DicksESP");
WiFiConnect();
}
void loop() {
delay(100);
testConnection(); //If the WiFi was interrupted, re-connect to the AP
delay(2000);
callTemperatures(); //Call the temperatures from the DS18b20 sensor
delay(2000);
getSetTemp(); //GET request that retrieves the temperature from the SQL database
delay(2000);
compressorControl(); //Determine whether or not to turn the fridge on or off. There is a 10 minute compressor delay built in
delay(1000);
postTemp(); //POST the temperature from the sensor to a PHP file and then to the site
delay(2000);
sendEmail(); //Send an email through IFTTT if the fridge is out of the set range.
delay(2000);
}
void WiFiConnect() {
if (debugging) {
Serial.print("Connecting to ");
Serial.println(ssid);
}
// Connect to the WiFi access point
WiFi.begin(ssid, password);
/*While the WiFi is not connected, print some periods in half
* second intervals and turn off the light
*/
while (WiFi.status() != WL_CONNECTED) {
digitalWrite(LED_BUILTIN, HIGH);
delay(500);
if (debugging) {
Serial.print(".");
}
}
if (debugging) {
Serial.println("WiFi connected");
Serial.println("IP address: " + WiFi.localIP());
}
/*Turn on the light once the WiFi is connected*/
digitalWrite(LED_BUILTIN, LOW);
}
void testConnection() {
// If the WiFi isn't connected, re-connect the WiFi
if (WiFi.status() != WL_CONNECTED) {
digitalWrite(LED_BUILTIN, HIGH);
WiFiConnect();
}
}
void callTemperatures() {
if (debugging) {
Serial.println("Requesting temperartures...");
}
sensors.requestTemperatures();
if (debugging) {
Serial.println("DONE");
Serial.print("Temperature for the device 1 (index 0) is: ");
Serial.println(sensors.getTempFByIndex(0));
}
f = sensors.getTempFByIndex(0);
}
void compressorControl() {
/* If the temperature from the probe is less than or equal
* to the set value, then turn the compressor off
*/
if (f <= setVal - lowDifference) {
digitalWrite(relayPin, LOW);
digitalWrite(D4, LOW);
}
/* Not really necessary, but I assigned the
current time to millis to help visually keep track of current millis */
unsigned long currentMillis = millis();
/* If the temperature from the probe is greater than the set value AND it has been more than 10 minutes
* since the compressor last shut off; then turn the compressor back on
*/
if ((f > setVal + highDifference) && (currentMillis - lightLastOff) >= compDelay) {
lightLastOff = millis();
digitalWrite(relayPin, HIGH);
digitalWrite(D4, HIGH);
}
if (debugging) {
Serial.print("Setting in compressor control: ");
Serial.println(setVal);
Serial.println();
}
}
void postTemp() {
String temp = "f=";
String currentData = temp+f;
if (client.connect("www.smallbatchbru.com", 80)) {
if (debugging) {
Serial.println("Connected to POST");
}
client.println("POST /controller/fermTempPHP.php HTTP/1.1");
client.println("Host: www.smallbatchbru.com");
client.println("Connection: close");
client.println("Content-Type: application/x-www-form-urlencoded");
client.print("Content-Length: ");
client.println(currentData.length());
client.println();
client.print(currentData);
} else {
if (debugging) {
Serial.println("POST connection failed");
}
}
if (!client.connected()) {
if (debugging) {
Serial.println();
Serial.println("disconnecting.");
}
}
client.flush();
client.stop();
}
void getSetTemp() {
if (client.connect("www.smallbatchbru.com", 80)) {
if (debugging) {
Serial.println("Connected...getting SQL value");
}
client.println("GET /controller/setFromSQL.html HTTP/1.1");
client.println("Host: www.smallbatchbru.com");
client.println("Connection: close");
client.println();
} else {
if (debugging) {
Serial.println("Connection to get SQL value failed");
}
}
if (client.connected()) {
finder.find("<p>");
setVal = finder.getValue();
if (debugging) {
Serial.print("The temperature setting from the database is: ");
Serial.println(setVal);
}
} else {
if (debugging) {
Serial.println("Client not available");
}
}
if (!client.connected()) {
if (debugging) {
Serial.println();
Serial.println("disconnecting");
}
client.flush();
client.stop();
while (true);
}
}
/*
void sendEmail() {
if (f > outOfRange && executed == false) {
if (client.connect("maker.ifttt.com", 80)) {
if (debugging) {
Serial.println("Connected to Maker Webhooks");
}
client.println("POST /trigger/out_of_range/with/key/mv8BNkmZZIGrhCF9aUFtaBFJ_xys-L0d3pF1VCQ7rFa HTTP/1.1");
client.println("Host: maker.ifttt.com");
client.println("Connection: close");
client.println();
} else {
if (debugging) {
Serial.println("Could not connect to Maker WebHooks");
}
}
if (!client.connected()) {
if (debugging) {
Serial.println();
Serial.println("disconnecting");
}
client.flush();
client.stop();
while (true);
}
executed = true;
}
}
*/