ESP8266 stuck
Posted: Sat Apr 08, 2017 4:07 amHello community,
I made code that connects to my WiFi, reads temperature from DHT22, reads battery voltage, sends to my server that save all data to database and then in my website draws temperature graf of all my ESPs sensors, when it connect to server, server return number- time how long should ESP remain in deepsleep (everything can be set from my website), then it go to deep sleep and the process is repeated.
My problem is that sometimes- for example after one day of measuring the ESPs get stuck and I have to go where I placed them and reset them. Then they are sending data for eample another two days and again get stuck.
Also sometimes reading from DHT sensor return "nan" I dont know why so I put in code condition if so then restart and try again.
Thanks for any advice!
HW:
-Wemos D1 mini
-Wemos DHT Shield
-Wemos Battery Shield
-Pin D0 is connected to RST (wake from deep sleep)
-100k Ω resistor connected from + on battery shield connector to A0 (measuring approximately
battery voltage)
Code:
I made code that connects to my WiFi, reads temperature from DHT22, reads battery voltage, sends to my server that save all data to database and then in my website draws temperature graf of all my ESPs sensors, when it connect to server, server return number- time how long should ESP remain in deepsleep (everything can be set from my website), then it go to deep sleep and the process is repeated.
My problem is that sometimes- for example after one day of measuring the ESPs get stuck and I have to go where I placed them and reset them. Then they are sending data for eample another two days and again get stuck.
Also sometimes reading from DHT sensor return "nan" I dont know why so I put in code condition if so then restart and try again.
Thanks for any advice!
HW:
-Wemos D1 mini
-Wemos DHT Shield
-Wemos Battery Shield
-Pin D0 is connected to RST (wake from deep sleep)
-100k Ω resistor connected from + on battery shield connector to A0 (measuring approximately
battery voltage)
Code:
Code: Select all
#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>
#include <ESP8266HTTPClient.h>
#include "DHT.h"
#define USE_SERIAL Serial
#define DHTPIN 2
#define DHTTYPE DHT22
ESP8266WiFiMulti WiFiMulti;
DHT dht(DHTPIN, DHTTYPE);
//ESP sensor ID - every ESP have different ID (1-6)
int ID = 3;
unsigned int raw=0;
float volt=0.00;
float sleepTime;
String host = "http://www.xxxxxxxxxxx.xx/esp8266.php?temp=";
void setup() {
pinMode(BUILTIN_LED, OUTPUT);
pinMode(A0, INPUT);
USE_SERIAL.begin(115200);
WiFiMulti.addAP("XXXXX", "xxxxxx"); // connect to wifi
dht.begin();
}
void loop() {
USE_SERIAL.println("starting loop");
digitalWrite(BUILTIN_LED, HIGH);
// wait for WiFi connection
USE_SERIAL.print("connecting:");
while((WiFiMulti.run() != WL_CONNECTED)) {
digitalWrite(BUILTIN_LED, LOW); // control LED if connecting
USE_SERIAL.print(".");
delay(100);
}
if((WiFiMulti.run() == WL_CONNECTED)) {
digitalWrite(BUILTIN_LED, HIGH); // control led if connected
HTTPClient http;
USE_SERIAL.println();
USE_SERIAL.print("[HTTP] begin...\n");
String temp = String(dht.readTemperature());
delay(1500);
//sometimes reading from sensor fail and return "nan" ... if so, then go to short deepsleep and repeat process until sensor return number
if(temp == "nan"){
ESP.deepSleep(5000000,WAKE_RF_DEFAULT); //5s
}
raw = analogRead(A0);
volt=raw/1023.0;
volt=volt*4.2;
host += temp;
host += "&id=";
host += ID;
host += "&bat=";
host += volt;
http.begin(host);
USE_SERIAL.print("[HTTP] GET...\n");
// start connection and send HTTP header
int httpCode = http.GET();
// httpCode will be negative on error
if(httpCode > 0) {
// HTTP header has been send and Server response header has been handled
USE_SERIAL.printf("[HTTP] GET... code: %d\n", httpCode);
//server return how long will ESP remain in deep sleep
if(httpCode == 200) {
String payload = http.getString();
USE_SERIAL.println(payload);
int openBracket = payload.indexOf('?');
int closeBracket = payload.indexOf('!');
String timeToSleep = payload.substring(openBracket + 1, closeBracket);
USE_SERIAL.println(timeToSleep);
sleepTime = timeToSleep.toFloat();
sleepTime *= 60000000;
}
} else {
// USE_SERIAL.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());
}
http.end();
}
USE_SERIAL.println("going to sleep in 0.5sec");
delay(500);
USE_SERIAL.print("now sleeping for:");
USE_SERIAL.print(sleepTime / 1000000);
USE_SERIAL.print("seconds");
ESP.deepSleep(sleepTime,WAKE_RF_DEFAULT);
delay(100);
}