Multiple sensor data not uploading simultaneously on the Thingspeak fields of the same channel

6 次查看（过去 30 天）
Fariha Islam
Fariha Islam 2021-8-23
评论： Christopher Stapels 2022-5-26
I have created 3 fields for 3 of my sensor datas (gsr sensor, dht22 temperature and humidity sensor) . But the values are not updated into their respective fields simultaneously. I have written the code as follows, it would be very kind if someone could help me out. Thank you.
#include <dht.h>
#include <SoftwareSerial.h>
dht DHT;
#define DHT11_PIN 12
#define RX 2
#define TX 3
const int GSR=A2;
int sensorValue=0;
int gsr_average=0;
String AP = "XXXXXXXXXXX"; // AP NAME
String PASS = "XXXXXXXXXXXXX"; // AP PASSWORD
String API = "YYYYYYYYYYYY"; // Write API KEY
String HOST = "api.thingspeak.com";
String PORT = "80";
//String field = "field1";
int countTrueCommand;
int countTimeCommand;
boolean found = false;
//int valSensor=1;
SoftwareSerial esp8266(RX,TX);
void setup() {
Serial.begin(9600);
esp8266.begin(115200);
sendCommand("AT",5,"OK");
sendCommand("AT+CWMODE=1",5,"OK");
sendCommand("AT+CWJAP=\""+ AP +"\",\""+ PASS +"\"",20,"OK");
}
void loop() {
//valSensor = getSensorData();
sendtoServer();
}
String getTemperatureValue(){
int chk = DHT.read22(DHT11_PIN);
float t= DHT.temperature;
Serial.print(" Temperature(C)= ");
Serial.println(DHT.temperature);
delay(50);
return String (t);
}
String getHumidityValue(){
// int chk = DHT.read22(DHT11_PIN);
float h= DHT.humidity;
Serial.print(" Humidity in %= ");
Serial.println(DHT.humidity);
delay(50);
return String (h);
}
String getGSRValue(){
long sum=0;
for(int i=0;i<10;i++) //Average the 10 measurements to remove the glitch
{
sensorValue=analogRead(GSR);
sum += sensorValue;
delay(5);
}
gsr_average = sum/10;
Serial.println(gsr_average);
return String(gsr_average);
}
void sendtoServer(){
String getData = "GET /update?api_key="+ API +"&field1="+ getGSRValue();
sendCommand("AT+CIPMUX=1",5,"OK");
sendCommand("AT+CIPSTART=0,\"TCP\",\""+ HOST +"\","+ PORT,15,"OK");
sendCommand("AT+CIPSEND=0," +String(getData.length()+4),4,">");
esp8266.println(getData);delay(1000);countTrueCommand++;
sendCommand("AT+CIPCLOSE=0",5,"OK");
String getData2 = "GET /update?api_key="+ API +"&field2="+ getTemperatureValue();
sendCommand("AT+CIPMUX=1",5,"OK");
sendCommand("AT+CIPSTART=0,\"TCP\",\""+ HOST +"\","+ PORT,15,"OK");
sendCommand("AT+CIPSEND=0," +String(getData2.length()+4),4,">");
esp8266.println(getData2);delay(500);countTrueCommand++;
sendCommand("AT+CIPCLOSE=0",5,"OK");
String getData3 = "GET /update?api_key="+ API +"&field3="+ getHumidityValue();
sendCommand("AT+CIPMUX=1",5,"OK");
sendCommand("AT+CIPSTART=0,\"TCP\",\""+ HOST +"\","+ PORT,15,"OK");
sendCommand("AT+CIPSEND=0," +String(getData3.length()+4),4,">");
esp8266.println(getData3);delay(250);countTrueCommand++;
sendCommand("AT+CIPCLOSE=0",5,"OK");
}
void sendCommand(String command, int maxTime, char readReplay[]) {
Serial.print(countTrueCommand);
Serial.print(". at command => ");
Serial.print(command);
Serial.print(" ");
while(countTimeCommand < (maxTime*1))
{
esp8266.println(command);//at+cipsend
if(esp8266.find(readReplay))//ok
{
found = true;
break;
}
countTimeCommand++;
}
if(found == true)
{
Serial.println("OYI");
countTrueCommand++;
countTimeCommand = 0;
}
if(found == false)
{
Serial.println("Fail");
countTrueCommand = 0;
countTimeCommand = 0;
}
found = false;
}

请先登录，再回答此问题。

回答（3 个）

Vinod
Vinod 2021-8-23
编辑：Vinod 2021-8-24
That is likely because you are trying to update the same channel from multiple sensors and running afoul of how frequently a channel can be updated. Please use this example as a starting point: https://github.com/mathworks/thingspeak-arduino/tree/master/examples/ESP8266/via%20AT%20commands/WriteMultipleFields and use a separate channel per device.
  1 个评论
Christopher Stapels
Christopher Stapels 2021-8-30
You can update three sensors attached to the same device simultaneously, but it is not reccomended to use three devices to one channel. Also it is not reccomended to send three sensors to the same channel seperately instead of at the same time.

请先登录，再进行评论。

Megha Patil
Megha Patil 2022-5-25
Can i send the three sensor data (functions are connected on each other in project) on same channel as field 1, field 2, field 3 ? how it is possible? Thank you.
Megha Patil
Megha Patil 2022-5-26
Hello Sir,
I am tring to end DHT11 sensor data to ThingSpeak. At starting data is send on cloud and i can visivalize it properly, after 68 reading I am getting following error:
Humidity in %= 32
Temperature(C)= 27
0. at command => AT+CIPMUX=1 OYI
1. at command => AT+CIPSTART=0,"TCP","api.thingspeak.com",80 OYI
2. at command => AT+CIPSEND=0,60 Fail
1. at command => AT+CIPCLOSE=0 Fail
Is there any limit of sending data per day. Thank you.

社区

更多回答在  ThingSpeak Community

类别

在 Help Center 和 File Exchange 中查找有关 ThingSpeak 的更多信息

标签

产品


版本

R2018a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by