Em đang làm IoT trong chăm sóc sức khỏe, sử dụng arduino uno và esp8266, nhưng dữ liệu không được cập nhật, cũng không được hiển thị trong kênh Thingspeak. Mọi người có thể xem em đã có sai sót gì k ạ. Tại sao lệnh update k thể hiển thị trong đầu ra ạ 😚🥺 đây là code ạ #define USE_ARDUINO_INTERRUPTS true #define DEBUG true #define SSID "********" // "SSID-WiFiname" #define PASS "************" // "password" #define IP "184.106.153.149" // thingspeak.com ip #include <SoftwareSerial.h> #include "Timer.h" #include <PulseSensorPlayground.h> // Includes the PulseSensorPlayground Library. Timer t; PulseSensorPlayground pulseSensor; String msg = "GET /update?key=your api key"; SoftwareSerial esp8266(10,11); //Variables const int PulseWire = A0; // PulseSensor PURPLE WIRE connected to ANALOG PIN 0 const int LED13 = 13; // The on-board Arduino LED, close to PIN 13. int Threshold = 550; //for heart rate sensor float myTemp; int myBPM; String BPM; String temp; int error; int panic; int raw_myTemp; float Voltage; float tempC; void setup() { Serial.begin(9600); esp8266.begin(115200); pulseSensor.analogInput(PulseWire); pulseSensor.blinkOnPulse(LED13); //auto-magically blink Arduino's LED with heartbeat. pulseSensor.setThreshold(Threshold); // Double-check the "pulseSensor" object was created and "began" seeing a signal. if (pulseSensor.begin()) { Serial.println("We created a pulseSensor Object !"); //This prints one time at Arduino power-up, or on Arduino reset. } Serial.println("AT"); esp8266.println("AT"); delay(3000); if(esp8266.find("OK")) { connectWiFi(); } t.every(10000, getReadings); t.every(10000, updateInfo); } void loop() { panic_button(); start: //label error=0; t.update(); //Resend if transmission is not completed if (error==1) { goto start; //go to label "start" } delay(4000); } void updateInfo() { String cmd = "AT+CIPSTART=\"TCP\",\""; cmd += IP; cmd += "\",80"; Serial.println(cmd); esp8266.println(cmd); delay(2000); if(esp8266.find("Error")) { return; } cmd = msg ; cmd += "&field1="; //field 1 for BPM cmd += BPM; cmd += "&field2="; //field 2 for temperature cmd += temp; cmd += "\r\n"; Serial.print("AT+CIPSEND="); esp8266.print("AT+CIPSEND="); Serial.println(cmd.length()); esp8266.println(cmd.length()); if(esp8266.find(">")) { Serial.print(cmd); esp8266.print(cmd); } else { Serial.println("AT+CIPCLOSE"); esp8266.println("AT+CIPCLOSE"); //Resend... error=1; } } boolean connectWiFi() { Serial.println("AT+CWMODE=1"); esp8266.println("AT+CWMODE=1"); delay(2000); String cmd="AT+CWJAP=\""; cmd+=SSID; cmd+="\",\""; cmd+=PASS; cmd+="\""; Serial.println(cmd); esp8266.println(cmd); delay(5000); if(esp8266.find("OK")) { return true; } else { return false; } } void getReadings(){ raw_myTemp = analogRead(A1); Voltage = (raw_myTemp / 1023.0) * 5000; // 5000 to get millivots. tempC = Voltage * 0.1; myTemp = (tempC * 1.8) + 32; // conver to F Serial.println(myTemp); int myBPM = pulseSensor.getBeatsPerMinute(); // Calls function on our pulseSensor object that returns BPM as an "int". // "myBPM" hold this BPM value now. if (pulseSensor.sawStartOfBeat()) { // Constantly test to see if "a beat happened". Serial.println(myBPM); // Print the value inside of myBPM. } delay(20); char buffer1[10]; char buffer2[10]; BPM = dtostrf(myBPM, 4, 1, buffer1); temp = dtostrf(myTemp, 4, 1, buffer2); } void panic_button(){ panic = digitalRead(8); if(panic == HIGH){ Serial.println(panic); String cmd = "AT+CIPSTART=\"TCP\",\""; cmd += IP; cmd += "\",80"; Serial.println(cmd); esp8266.println(cmd); delay(2000); if(esp8266.find("Error")) { return; } cmd = msg ; cmd += "&field3="; cmd += panic; cmd += "\r\n"; Serial.print("AT+CIPSEND="); esp8266.print("AT+CIPSEND="); Serial.println(cmd.length()); esp8266.println(cmd.length()); if(esp8266.find(">")) { Serial.print(cmd); esp8266.print(cmd); } else { Serial.println("AT+CIPCLOSE"); esp8266.println("AT+CIPCLOSE"); //Resend... error=1; } } } if(window.hljsLoader && !document.currentScript.parentNode.hasAttribute('data-s9e-livepreview-onupdate')) { window.hljsLoader.highlightBlocks(document.currentScript.parentNode); }

https://www.instructables.com/id/ESP8266-IOT-Using-Arduino-and-ThingSpeak/

PhmKhnhTon Bạn chụp giúp board mạch xem ntn

dạ đây là hình ảnh bo mạch ạ, trong đó em có sử dụng con trở 10k ohm ở nút nhấn 4 chân

PhmKhnhTon Bạn thử xem lại samble code ni, bạn đổi phần ip thành domain như code mãu này thử xem #include #define DEBUG true #define RX 2 #define TX 3 String HOST = "api.thingspeak.com"; String PORT = "80"; String AP = "AP NAME"; String PASS = "AP PASSWORD"; String API = "CJZ1G46URZWEGRVR"; 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 +""",15,"OK"); countTrueCommand = 0; } void loop() { String getData = "GET /update?api_key="+ API +"&"+ field +"="+String(valSensor); switch(countTrueCommand) { case 0: sendCommand("AT",5,"OK");break; case 1: sendCommand("AT+RST",10,"invalid");break; case 2: sendCommand("AT+CIPMUX=1",5,"OK"); break; case 3: sendCommand("AT+CIPSTART=0,"TCP","+ HOST +","+ PORT,15,"OK"); break; case 4: sendCommand("AT+CIPSEND=0," +String(getData.length()+4),4,">"); break; case 5: esp8266.println(getData);delay(1500);countTrueCommand++; break; case 6: sendCommand("AT+CIPCLOSE=0",5,"OK"); break; case 7: Serial.println(valSensor); Serial.print(getData); Serial.print(","); Serial.println(getData.length()); valSensor = random(100000); // random value, change with sensor value if using sensor countTrueCommand = 0; delay(10000); break; } } 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; } if(window.hljsLoader && !document.currentScript.parentNode.hasAttribute('data-s9e-livepreview-onupdate')) { window.hljsLoader.highlightBlocks(document.currentScript.parentNode); }

making OK không bạn PhmKhnhTon

Bị lỗi bạn ạ, nhưng mình k thể load ảnh lên web được

#include expects “FILENAME” or <FILENAME>

sau khi mình đã bỏ tên vào rồi thì nó báo lỗi như vầy unable to find string literal operator ‘operator""TCP’ with ‘const char [16]’, ‘unsigned int’ arguments ở case 3 case 3: sendCommand("AT+CIPSTART=0,"TCP","+ HOST +","+ PORT,15,"OK"); break;

PhmKhnhTon Bạn viết + các chỗi bị sai. nếu trong 2 dấu ngoặc kém có dấu ngoặc kém thì dùng dấu \ để đặt ở trước nhé. ví dụ "abc\“def”

/*this is 100% working program just change your AP name pass and things speak password*/ #include <SoftwareSerial.h> #define DEBUG true #define RX 8 #define TX 7 String HOST = "api.thingspeak.com"; String PORT = "80"; String AP = "XXXX";//your AP name String PASS = "XXXX"; \\your AP password String API = "XxxXPF**V6**OEIL";//your API 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); Serial.println("AT+CWJAP=\"" + AP + "\",\"" + PASS + "\""); sendCommand("AT", 5, "OK"); sendCommand("AT+CWMODE=1", 5, "OK"); sendCommand("AT+CWJAP=\"" + AP + "\",\"" + PASS + "\"", 15, "OK"); countTrueCommand = 0; } void loop() { String readDat = "GET https://api.thingspeak.com/channels/9/feeds.json?... String getData = "GET / update ? api_key = "+ API +"&"+ field +" = "+String(valSensor); switch(countTrueCommand) { case 0: sendCommand("AT",5,"OK");break; case 1: sendCommand("AT + RST",10,"OK");break; case 2: sendCommand("AT + CIPMUX = 1",5,"OK"); break; case 3: sendCommand("AT + CIPSTART = 0, \"TCP\",\"" + HOST + "\"," + PORT, 15, "OK"); break; case 4: sendCommand("AT+CIPSEND=0," + String(getData.length() + 4), 4, ">"); break; case 5: esp8266.println(getData); delay(1500); countTrueCommand++; break; case 6: sendCommand("AT+CIPCLOSE=0", 5, "OK"); break; case 7: Serial.println(valSensor); Serial.print(getData); Serial.print(","); Serial.println(getData.length()); valSensor = random(100000); // random value, change with sensor value if using sensor countTrueCommand = 0; delay(10000); break; } } 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; } if(window.hljsLoader && !document.currentScript.parentNode.hasAttribute('data-s9e-livepreview-onupdate')) { window.hljsLoader.highlightBlocks(document.currentScript.parentNode); }

PhmKhnhTon
Bạn KT xem nối đúng dây không,
#define RX 8
#define TX 7

có vẻ Arduino của bạn không nhận được dữ liệu thử Esp


Serial.println("AT+CWMODE=1");
  esp8266.println("AT+CWMODE=1");
  delay(2000);
  Serial.println("  AT+CWLAP");
  esp8266.println("  AT+CWLAP");
  delay(2000);

  String cmd="AT+CWJAP=\"";

making

Mình nhìn mạch của bạn thì bạn sửa

#define RX 8
#define TX 7

thành

#define RX 11
#define TX 10

hoặc

#define RX 10
#define TX 11

PhmKhnhTon

making mình đã xem lại và thấy lộn dây r ạ, mình đang test lại <3

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