Domotique/WifiControlSensor/EEPROM.ino

/*  EEPROM LAYOUT
                  "BOOTMODE;SSID;PASSWORD;HOSTNAME;MQTT_SERVER;MQTT_USERNAME;MQTT_PASSWD;MQTT_PORT;IP_CONFIG;IP;GATEWAY;NETMASK;DNS1;DNS2;"
    BOOTMODE could be 0 for Setup, 1 for normal use, 2 for OTA
    IP_CONFIG could be 0 for DHCP, 1 for static
    Setup mode is trigger by setting GPIO3 to ground or at first boot
*/
#include "EEPROM.h" 

char eeprom[CONFIG_EEPROM_SIZE];

int EepromSaveConfig(productConfig &config) {
  String eeprom;

  eeprom = String(config.bootMode) + ";" + config.ssid + ";" + config.password + ";"
           + config.host + ";" + config.mqttServer +  ";"
           + config.mqttUser + ";" + config.mqttPasswd + ";"
           + String(config.mqttPort) + ";"
           + String(config.ip_mode) + ";"
           + config.ip + ";" + config.gw + ";" + config.mask + ";"
           + config.dns + ";" + config.dns2 + ";";

  if (eeprom.length() > CONFIG_EEPROM_SIZE )
    return -EMSGSIZE;

  SKETCH_DEBUG_PRINTLN("Saving " + eeprom);

  for (uint i = 0; i < eeprom.length() && i < CONFIG_EEPROM_SIZE; i++) {
    EEPROM.write(i, eeprom.charAt(i));
  }

  EEPROM.commit();
  delay(100);

  return 0;
}

int EepromSaveBootMode(uint8_t bootMode) {
  EEPROM.write(0, String(bootMode).charAt(0));
  EEPROM.commit();
  delay(100);
  return 0;
}

void readConfElement(char** element, int &i) {
  *element = &eeprom[i];
  do {
    eeprom[i] = EEPROM.read(i);
    i++;
  } while (i < CONFIG_EEPROM_SIZE && eeprom[i - 1] != ';');
  eeprom[i - 1] = '\0';

  if (i >= CONFIG_EEPROM_SIZE){
    SKETCH_DEBUG_PRINTLN("Looks like there is a configuration issue (too long)");
    **element = '\0';
  }

}

void EepromReadConfig(productConfig &config) {

  int i = 2;

  uint8_t boot = EEPROM.read(0);
  char *tmpString;

  if (boot == '1') {
    config.bootMode = BOOTMODE_SETUP;
  } else if (boot == '2') {
    config.bootMode = BOOTMODE_NORMAL;
  } else if (boot == '3') {
    config.bootMode = BOOTMODE_OTA;
  } else {
    //Do not need to parse EEPROM when not configured
    config.bootMode = BOOTMODE_SETUP;
    return;
  }

  readConfElement(&config.ssid, i);
  readConfElement(&config.password, i);
  readConfElement(&config.host, i);
  readConfElement(&config.mqttServer, i);
  readConfElement(&config.mqttUser, i);
  readConfElement(&config.mqttPasswd, i);
  readConfElement(&tmpString, i);
  config.mqttPort = atoi(tmpString);
  readConfElement(&tmpString, i);
  config.ip_mode = atoi(tmpString);
  readConfElement(&tmpString, i);
  config.ip = atoi(tmpString);
  readConfElement(&tmpString, i);
  config.gw = atoi(tmpString);
  readConfElement(&tmpString, i);
  config.mask = atoi(tmpString);
  readConfElement(&tmpString, i);
  config.dns = atoi(tmpString);
  readConfElement(&tmpString, i);
  config.dns2 = atoi(tmpString);

}