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HardWare/아두이노

EEPROM+Serial을 이용한 Setting(AT) 만들기

White Whale 2017. 1. 10. 10:42
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1. 개요

  

  EEPROM을 이용하면 보드내 변수를 동적으로 사용할 수 있다. 이때 Serial 통신의 메시지를 통해 EEPROM에 저장되는 데이터를 읽고, 쓰며, 이를 활용하여 Setting을 만들어 보자.





2. Source Code

  

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#include <EEPROM.h>
#define EEP_DATA_LEN 100
 
const String ModeCommand = String("AT");
const String SSIDCommand = String("AT+SSID");
const String PASSWDCommand = String("AT+PASSWD");
const String BROKERCommand = String("AT+BROKER");
const String ENDCommand = String ("AT+END");
const String CommnadLine = "("+ SSIDCommand + ", " + PASSWDCommand + ", " + BROKERCommand + ", " + ENDCommand +")";
 
bool mode = false;
String mSSID, mPASSWD, mBROKER;
 
void EEPread(){
    int startAt,endAt;
    String readData = "";
    char temp;
    for (int i = 0; i < EEP_DATA_LEN; ++i)
    {
        temp = char(EEPROM.read(i));
        if(temp == '!')
            break;
        readData += temp;
    }
   
    endAt = readData.indexOf('/',0);
    mSSID = readData.substring(0,endAt);
     
    startAt = endAt+1;
    endAt = readData.indexOf('/',startAt);
    mPASSWD = readData.substring(startAt,endAt);
     
    startAt = endAt+1;
    endAt = readData.indexOf('/',startAt);
    mBROKER = readData.substring(startAt,endAt);
}
 
void EEPwrite(){
    String writeData = mSSID + "/" + mPASSWD + "/" + mBROKER + "!";
 
    for (int i = 0; i < EEP_DATA_LEN; ++i) {
        EEPROM.write(i, 0); //clearing
    }
   // EEPROM.commit();  //esp8266
     
    for (int i = 0; i < writeData.length(); ++i)
    {
        EEPROM.write(i, writeData[i]);
    }
     
   // EEPROM.commit();  //esp8266
}
 
void printSettingValue(){
    Serial.println("Current Setting Value");
    Serial.println("SSID : " + mSSID);
    Serial.println("SSID's Passwd : " + mPASSWD);
    Serial.println("Broker IP : " + mBROKER);
}
 
void setup() {
    //Serial.begin(9600); 
    Serial.begin(115200);
    //EEPROM.begin();      //Arduino Board(ex.UNO) need this command.But other Board may not need this command
    EEPread();
     
    for(int i=0;i<100;i++){
        if(Serial.available()){
            String str = Serial.readString();
            if(str.equals(ModeCommand)){
                Serial.println(str);
                Serial.println("OK\n");
                printSettingValue();
                Serial.println("\nInput Command" + CommnadLine + "\n");
                mode = true;
                break;
            }
        }
        delay(100);
    }
}
 
void loop() {
    if(mode){
        if(Serial.available()){
            String str = Serial.readString();
            if(str.equals(SSIDCommand)){
                Serial.println(str);
                Serial.println("Input New SSID!");
                while(1){
                    if(Serial.available()){
                        mSSID = Serial.readString();
                        Serial.print("New SSID is '");
                        Serial.print(mSSID);
                        Serial.println("'");
                        EEPwrite();
                        Serial.println("\nInput Command" + CommnadLine + "\n");
                        break;
                    }
                }
            }else if(str.equals(PASSWDCommand)){
                Serial.println(str);
                Serial.println("Input New SSID's Passwd!");
                while(1){
                    if(Serial.available()){
                        mPASSWD = Serial.readString();
                        Serial.print("New SSID's Passwd is '");
                        Serial.print(mPASSWD);
                        Serial.println("'");
                        EEPwrite();
                        Serial.println("\nInput Command" + CommnadLine + "\n");
                        break;
                    }
                }
            }else if(str.equals(BROKERCommand)){
                Serial.println(str);
                Serial.println("Input New Broker IP!");
                while(1){
                    if(Serial.available()){
                        mBROKER = Serial.readString();
                        Serial.print("New Broker IP is '");
                        Serial.print(mBROKER);
                        Serial.println("'");
                        EEPwrite();
                        Serial.println("\nInput Command" + CommnadLine + "\n");
                        break;
                    }
                }
            }else if(str.equals(ENDCommand)){
                Serial.println(str);
                printSettingValue();
                Serial.print("\nSetting Value Saved and END!!");
            }else{
                Serial.println(str);
                Serial.print("'");
                Serial.print(str);
                Serial.print("'");
                Serial.println("is not Command"+CommnadLine);
            }
        }
    }else{
        //Here Loop Program
    }
}

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