Hello, I am using NodeMCU Programming board with 2 distance sensors. Two days ago the code worked just fine but now I have a bunch of errors, and I tried even with an example from Arduino basics and still doesn't compile. I updated all the libraries but still nothing....
Here is the code for Arduino :
#include<ESP8266WiFi.h> // include ESP8266 library
const char* ssid= "******"; // wifi name
const char* pass= "**********"; // wifi password
const char* server = "api.thingspeak.com"; // server name
String apikey = "********************"; // Api key from website
WiFiClient client; // create a client Class
const int trigPin = 12;
const int echoPin = 14;
#define SOUND_VELOCITY 0.034
long duration;
float distanceCm;
void setup() {
Serial.begin(115200); // Initialize the Serial monitor at 9600 bps
Serial.print("void loop Robotech and Automation");
Serial.println("Temperarute and Humidity Sensor");
delay(100);
WiFi.begin(ssid,pass); // Wifi Initialization with SSID and PASSWORD
Serial.print("Connecting to ");
Serial.print(ssid); // Print connecting to Wifi name
// here is waiting to connect internet
while(WiFi.status()!=WL_CONNECTED)
{
Serial.print(".");
delay(100);
}
Serial.println(" ");
Serial.println("connected succesfully to : ");
Serial.println(WiFi.localIP());
pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
pinMode(echoPin, INPUT); // Sets the echoPin as an Input
}
void loop() {
// Clears the trigPin
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
// Sets the trigPin on HIGH state for 10 micro seconds
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
// Reads the echoPin, returns the sound wave travel time in microseconds
duration = pulseIn(echoPin, HIGH);
// Calculate the distance
distanceCm = duration * SOUND_VELOCITY/2;
if (distanceCm > 500)
{
Serial.print("Error in measuring");
}
else {
// Prints the distance on the Serial Monitor
Serial.print("Distance (cm): ");
Serial.println(distanceCm);
if(client.connect(server, 80))
{
String postreq = apikey;
postreq += "&field1=";
postreq += String(distanceCm);
postreq += "\r\n\r\n";
client.print("POST /update HTTP/1.1\n");
client.print("HOST: api.thingspeak.com\n");
client.print("Connection: close\n");
client.print("X-THINGSPEAKAPIKEY: " + apikey + "\n");
client.print("Content-Type: application/x-www-form-urlencoded\n");
client.print("Content-Length: ");
client.print(postreq.length());
client.print("\n\n");
client.print(postreq);
}
client.stop();
Serial.println("waiting........");
delay(1000);
}
}
I get errors like :
Arduino: 1.8.16 (Windows 10), Board: "NodeMCU 1.0 (ESP-12E Module), 80 MHz, Flash, Disabled (new aborts on oom), Disabled, All SSL ciphers (most compatible), 32KB cache + 32KB IRAM (balanced), Use pgm_read macros for IRAM/PROGMEM, 4MB (FS:2MB OTA:~1019KB), 2, v2 Lower Memory, Disabled, None, Only Sketch, 115200"
undefined reference to ets_post' undefined reference to vPortFree'
and a bunch of others like this
Can someone please help me with that . Thank you
