Iam Getting error ^~~~~~~~ exit status 1 call of overloaded 'setField(int, uint16_t&)' is ambiguousn while compiling code to Arduino Uno wifi rev 2

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NAGUBATHULA SATYA SRIRAM
评论： NAGUBATHULA SATYA SRIRAM 2022-4-27
iam trying to send dfrobot dissolved oxygen meter readings to things speak but i am getting error. i compiled the code individually and verifed the readings the code is fuctioning and is working good. Then i uploaded the same code to thingspeak using MKR1000 then also it worked good . But when i used wifi NINA / Arduino Uno wifi rev 2 iam getting an error for transferring the data to things speak. please someone help me clearing this error.
iam attching the error code ^~~~~~~~
exit status 1
call of overloaded 'setField(int, uint16_t&)' is ambiguous
CODE:
I HAVE UNDERLINED AND BOLDED THE LINE IN THE CODE WHERE IAM GETTING ERROR.
#include <WiFiNINA.h>
#include "secrets.h"
#include "ThingSpeak.h" // always include thingspeak header file after other header files and custom macro
#define SensorPin A0 // the pH meter Analog output is connected with the Arduino’s Analog
unsigned long int avgValue; //Store the average value of the sensor feedback
float b;
int buf[10],temp;
#include <Arduino.h>
#define DO_PIN A1
#define VREF 5000 //VREF (mv)
#define ADC_RES 1024 //ADC Resolution
//Single-point calibration Mode=0
//Two-point calibration Mode=1
#define TWO_POINT_CALIBRATION 0
#define READ_TEMP (25) //Current water temperature ℃, Or temperature sensor function
//Single point calibration needs to be filled CAL1_V and CAL1_T
#define CAL1_V (1904) //mv
#define CAL1_T (25) //℃
//Two-point calibration needs to be filled CAL2_V and CAL2_T
//CAL1 High temperature point, CAL2 Low temperature point
#define CAL2_V (1300) //mv
#define CAL2_T (15) //℃
const uint16_t DO_Table[41] = {
14460, 14220, 13820, 13440, 13090, 12740, 12420, 12110, 11810, 11530,
11260, 11010, 10770, 10530, 10300, 10080, 9860, 9660, 9460, 9270,
9080, 8900, 8730, 8570, 8410, 8250, 8110, 7960, 7820, 7690,
7560, 7430, 7300, 7180, 7070, 6950, 6840, 6730, 6630, 6530, 6410};
uint8_t Temperaturet;
uint16_t ADC_Raw;
uint16_t ADC_Voltage;
uint16_t DO;
int16_t readDO(uint32_t voltage_mv, uint8_t temperature_c)
{
#if TWO_POINT_CALIBRATION == 00
uint16_t V_saturation = (uint32_t)CAL1_V + (uint32_t)35 * temperature_c - (uint32_t)CAL1_T * 35;
return (voltage_mv * DO_Table[temperature_c] / V_saturation);
#else
uint16_t V_saturation = (int16_t)((int8_t)temperature_c - CAL2_T) * ((uint16_t)CAL1_V - CAL2_V) / ((uint8_t)CAL1_T - CAL2_T) + CAL2_V;
return (voltage_mv * DO_Table[temperature_c] / V_saturation);
#endif
}
char ssid[] = SECRET_SSID; // your network SSID (name)
char pass[] = SECRET_PASS; // your network password
int keyIndex = 0; // your network key Index number (needed only for WEP)
WiFiClient client;
unsigned long myChannelNumber = SECRET_CH_ID;
const char * myWriteAPIKey = SECRET_WRITE_APIKEY;
// Initialize our values
int number1 = 0;
int number2 = random(0,100);
int number3 = random(0,100);
int number4 = random(0,100);
String myStatus = "";
void setup() {
Serial.begin(115200); // Initialize serial
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo native USB port only
}
ThingSpeak.begin(client); // Initialize ThingSpeak
}
void loop() {
// Connect or reconnect to WiFi
if(WiFi.status() != WL_CONNECTED){
Serial.print("Attempting to connect to SSID: ");
Serial.println(SECRET_SSID);
while(WiFi.status() != WL_CONNECTED){
WiFi.begin(ssid, pass); // Connect to WPA/WPA2 network. Change this line if using open or WEP network
Serial.print(".");
delay(5000);
}
Serial.println("\nConnected.");
}
// Get a reading from the temperature sensor:
for(int i=0;i<10;i++) //Get 10 sample value from the sensor for smooth the value
{
buf[i]=analogRead(SensorPin);
delay(10);
}
for(int i=0;i<9;i++) //sort the analog from small to large
{
for(int j=i+1;j<10;j++)
{
if(buf[i]>buf[j])
{
temp=buf[i];
buf[i]=buf[j];
buf[j]=temp;
}
}
}
avgValue=0;
for(int i=2;i<8;i++) //take the average value of 6 center sample
avgValue+=buf[i];
float phValue=(float)avgValue*5.0/1024/6; //convert the analog into millivolt
phValue=3.5*phValue; //convert the millivolt into pH value
Serial.print(" pH:");
Serial.print(phValue,2);
Serial.println(" ");
delay(1000);
Temperaturet = (uint8_t)READ_TEMP;
ADC_Raw = analogRead(DO_PIN);
ADC_Voltage = uint32_t(VREF) * ADC_Raw / ADC_RES;
Serial.print("Temperaturet:\t" + String(Temperaturet) + "\t");
Serial.print("ADC RAW:\t" + String(ADC_Raw) + "\t");
Serial.print("ADC Voltage:\t" + String(ADC_Voltage) + "\t");
Serial.println("DO:\t" + String(readDO(ADC_Voltage, Temperaturet)) + "\t");
delay(1000);
// set the fields with the values
ThingSpeak.setField(1, Temperaturet);
ThingSpeak.setField(2, phValue);
ThingSpeak.setField(3, ADC_Voltage); // (HERE IAM GETTING THE ERROR)
ThingSpeak.setField(4, number4);
// figure out the status message
if(number1 > number2){
myStatus = String("field1 is greater than field2");
}
else if(number1 < number2){
myStatus = String("field1 is less than field2");
}
else{
myStatus = String("field1 equals field2");
}
// set the status
ThingSpeak.setStatus(myStatus);
// write to the ThingSpeak channel
int x = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
if(x == 200){
Serial.println("Channel update successful.");
}
else{
Serial.println("Problem updating channel. HTTP error code " + String(x));
}
// change the values
number1++;
if(number1 > 99){
number1 = 0;
}
number2 = random(0,100);
number3 = random(0,100);
number4 = random(0,100);
delay(20000); // Wait 20 seconds to update the channel again
}

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回答（1 个）

Christopher Stapels
编辑：Christopher Stapels 2022-4-27
Can you cast it to a string or float before setting the field? I know this will require more memory.
perhaps like this:
ThingSpeak.setField(3, float(ADC_Voltage));

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