EEPROM+Serial을 이용한 Setting(AT) 만들기

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

  

#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 } }