NodeMCU won't wake up after deepsleep
Posted: Wed Nov 14, 2018 12:38 amI am using a NodeMCU V3 (ESP8266) module. I tried to make a simple datalogger that connects to a WiFi and uploads data to ThingSpeak. Since the NodeMCU takes a lot of power and since it won't be used all the time, I wanted to put it to deepsleep until it is needed again. However, after it goes to sleep it doesn't seem to wake up again. I connected the GPIO16 to the RST pin as required. The code is given below.
The output on the serial monitor is as shown below.
After printing 'sleeping', some mixed up jargon will be printed and that's it.
Code: Select all
#include <DallasTemperature.h>
#include <OneWire.h>
#include <DHT.h>
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ThingSpeak.h>
#define LED_BULB 4
#define ONE_WIRE_BUS 0 //D1 pin of nodemcu
#define DHTPIN 5
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);
const char* ssid = "XXXXX";
const char* password = "XXXXX";
WiFiClient client;
unsigned long myChannelNumber = XXXXX;
const char * myWriteAPIKey = "XXXXX";
uint8_t temperature, humidity, dsb;
void startup()
{
pinMode(LED_BULB, OUTPUT);
digitalWrite(LED_BULB, LOW);
Serial.begin(115200);
dht.begin();
delay(10);
// Connect to 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");
// Print the IP address
Serial.println(WiFi.localIP());
ThingSpeak.begin(client);
sensors.begin();
}
void setup()
{
}
void loop()
{
startup();
Serial.print("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
sensors.requestTemperatures();
Serial.print("DSB Temperature is: ");
Serial.println(sensors.getTempCByIndex(0));
dsb = sensors.getTempCByIndex(0);
temperature = dht.readTemperature();
humidity = dht.readHumidity();
Serial.print("Temperature Value is :");
Serial.print(temperature);
Serial.println("C");
Serial.print("Humidity Value is :");
Serial.print(humidity);
Serial.println("%");
digitalWrite(LED_BULB, HIGH);
Serial.println("Uploading DHT temp");
ThingSpeak.writeField(myChannelNumber, 1, temperature, myWriteAPIKey);
delay(30000);
Serial.println("Uploading DHT hum");
ThingSpeak.writeField(myChannelNumber, 2, humidity, myWriteAPIKey);
delay(30000);
Serial.println("Uploading DS temp");
ThingSpeak.writeField(myChannelNumber, 3, dsb, myWriteAPIKey);
Serial.println("Done uploading");
delay(30000);
digitalWrite(LED_BULB, LOW);
delay(500);
digitalWrite(LED_BULB, HIGH);
delay(500);
digitalWrite(LED_BULB, LOW);
delay(500);
digitalWrite(LED_BULB, HIGH);
delay(500);
digitalWrite(LED_BULB, LOW);
delay(500);
Serial.println("Sleeping");
ESP.deepSleep(120000000); //sleeping for 120 seconds
Serial.println("Waking up");
} The output on the serial monitor is as shown below.
Code: Select all
Connecting to XXXXX
..............................................................
WiFi connected
XXXXXX
DSB Temperature is: 26.56
Temperature Value is :25C
Humidity Value is :92%
Uploading DHT temp
Uploading DHT hum
Uploading DS temp
Done uploading
SleepingAfter printing 'sleeping', some mixed up jargon will be printed and that's it.