I want to use EEPROM to store an INT that i can use after a reboot.
I have this code in place to store the value. That generates no errors.
int addr = 10;
uint16_t tempSet;
EEPROM.put(addr, tempSet);
But when i want to retrieve the value with
int addr = 10;
uint16_t tempSet;
EEPROM.get(addr, tempSet);
if(tempSet == 0xFFFF) {
tempSet = 10; // EEPROM was empty -> initialize value
}
I get this error.
worst.ino:19:7: expected constructor, destructor, or type conversion before '.' token error
worst.ino:20:1: expected unqualified-id before 'if'
Anybody an idea what i'm doing wrong? I thought i followed the example well.
https://docs.particle.io/reference/device-os/firmware/photon/#eeprom
Can you also post the context of these instructions?
This error message may suggest that you are calling these functions in the declaration section and not from within a function.
Sure.
// Settings
int maxTempDiff = 1; // value should not be zero! worst should not get x degrees hotter or colder
int fanSpeed = 100; // value between 0% and 100%
int addr = 10;
uint16_t tempSet;
EEPROM.get(addr, tempSet);
if(tempSet == 0xFFFF) {
tempSet = 10; // EEPROM was empty -> initialize value
}
//int tempSet = 10; // temperature setting
const long valuesInterval = 1000; // interval for getting values // 1000 is ok
const long publishInterval = 30000; // interval for publishing values // 30000 for production and 5000 for debugging
// libs
#include <Adafruit_DHT.h> // DHT library
#define DHTPIN 7 // pin of DHT sensor for internal temp en humidity measurement
#define DHTTYPE DHT11 // sensor type
DHT dht(DHTPIN, DHTTYPE);
#include <DS18B20.h>
const int MAXRETRY = 4;
DS18B20 ds18b20(D6, true); //Sets Pin D6 for external temp sensor
// Variables
int extTemp;
int intTemp; // to store the internal temperature
int intHumi; // to store the internal humidity
int worstHumi; // to store humidity of the worst
int relayCooling = D0; // relay for controling the cooling of the worstkast
int relayHeating = D1; // relay for controlling the heating the worstkast
int climaStatus; // to store the status of the climate controls, is the heating (1) or cooling (2) activated
int enviroStatus = 0; // to store the status of the enverimont, is the outside of the worstkast cooler (1) or hotter (2) then the desired temperature
unsigned long previousMillisPublishInterval = 0; // remember the time
unsigned long previousMillisValuesInterval = 0; // remember the time
void setup() {
Serial.begin(115200);
dht.begin(); // Start DHT sensor
pinMode(D0, OUTPUT); //relay1
pinMode(D1, OUTPUT); //relay2
pinMode(D6, INPUT); //external temperature sensor
pinMode(D7, INPUT); //internal temperature / humidity sensor
pinMode(A0, OUTPUT); //external fan
pinMode(A1, INPUT); // humidity sensor
Particle.function("setTemp",setTemp);
Particle.function("setFan",setFan);
}
void loop() {
unsigned long currentMillis = millis(); // what time is it?
if (currentMillis - previousMillisValuesInterval >= valuesInterval) {
previousMillisValuesInterval = currentMillis;
getValues(); // get all values from the worstkast sensors
}
if (currentMillis - previousMillisPublishInterval >= publishInterval) {
previousMillisPublishInterval = currentMillis;
publishValues(); // publish to console and dashboard
}
climaControl(); // regulate the climate in the worstkast
delay(10); // delay 10 ms in between reads for stability
}
int setFan (String value) { // function to call from Losant to control the fan
fanSpeed = value.toInt();
return 1;
}
int setTemp (String value) { // if a new temp is set from the dashboard
tempSet = value.toInt();
// Write the tempSet to an EEPROM address
int addr = 10;
uint16_t tempSet;
EEPROM.put(addr, tempSet);
return 1;
}
void getValues () { // read the values of the DHT sensor
intTemp = dht.getTempCelcius(); // internal temperature measurement
intHumi = dht.getHumidity(); // internal humidity measurement
worstHumi = map (analogRead(A1),4096,500,0,100); // worst humidity measurement (4096 = 0% humi and 500 100% humi) and mapping to percentage
getTemp();
}
void publishValues () { // publish the values to the losant dashboard https://app.losant.com/dashboards/5c45c1eac853d20008cd9f4d
// sprintf(extTemp, "%2.0f", extTemp);
Particle.publish("worst_closet_data", String(intTemp) + ":" + String(intHumi) + ":" + String(tempSet) + ":" + String(fanSpeed)
+ ":" + String(climaStatus) + ":" + String(enviroStatus) + ":" + String(worstHumi) + ":" + String(extTemp));
}
void climaControl () { // climaControl routine
int fanWrite = map(fanSpeed, 0, 100, 0, 255); // transform from percentage (0-100) to value we can write to fan (0-255)
analogWrite (A0, (fanSpeed)); // set fan to speed x
int maxTemp = tempSet + maxTempDiff ; // calculate the minimum temperature based on the set temp. and the max allowed deviation
int minTemp = tempSet - maxTempDiff ; // calculate the maximum temperature based on the set temp. and the max allowed deviation
if (extTemp < minTemp) { // if enverimont is colder then minimum temp that worstkast has to be warmed to
enviroStatus = 1;
if (intTemp >= maxTemp) { // if hot enough
digitalWrite(relayHeating, LOW); // stop heating
climaStatus = 0;
}
else if (intTemp <= minTemp) { // if to cold
digitalWrite(relayHeating, HIGH); //start heating
climaStatus = 1;
}
}
else if (extTemp > maxTemp) { // if enverimont is hotter then maximum temp that the worstkast has to be cooled to
enviroStatus = 2;
if (intTemp <= minTemp) { // if cold enough
digitalWrite(relayCooling, LOW); // stop cooling
climaStatus = 0;
}
else if (intTemp >= maxTemp) { // if to hot
digitalWrite(relayCooling, HIGH); //start cooling
climaStatus = 2;
}
}
else if (extTemp = tempSet) {
enviroStatus = 0;
}
}
void getTemp(){ // for reading external temp sensor
float _temp;
int i = 0;
do {
_temp = ds18b20.getTemperature();
} while (!ds18b20.crcCheck() && MAXRETRY > i++);
if (i < MAXRETRY) {
extTemp = _temp;
}
else {
extTemp = NAN;
}
}
As I expected.
That code can't be placed outside of a function - only delcarations/definitions are allowed there.
When you put
EEPROM.get(addr, tempSet);
if(tempSet == 0xFFFF) {
tempSet = 10; // EEPROM was empty -> initialize value
}
into setup() the error will go away.
6 Likes
That was an easy fix 
Thx for the help!
1 Like