到目前为止,我已经实现了从ESP8266 EEPROM读取字符串的操作。
但是,尝试将第二个字符串附加到刚刚读取的第一个字符串上是行不通的!
我首先在EEPROM的地址0处输入数字2
。我从地址0读到6。
这是我的ESP8266.ino代码:
String readM = "";
String appendixStr = "|||";
Serial.print("appendixStr = ");
Serial.println(appendixStr);
String dailyzStr = "";
for (int a = 0; a < 7; ++a) { // addr 0...6
dailyzStr += char(EEPROM.read(a));
}
readM += dailyzStr + appendixStr;
Serial.print("hmmm = ");
Serial.println(readM);
这是日志显示的内容:
很明显,我希望得到hmmm = 2|||
,但我只会得到hmmm = 2
为什么不能追加??
答案 0 :(得分:1)
我建议使用此:
#include <EEPROM.h>
// Tell it where to store your config data in EEPROM
#define cfgStart 32
// To check if it is your config data
#define version "abc"
struct storeStruct_t{
char myVersion[3];
char name[32];
};
void saveConfig() {
// Save configuration from RAM into EEPROM
EEPROM.begin(4095);
EEPROM.put( cfgStart, settings );
delay(200);
EEPROM.commit(); // Only needed for ESP8266 to get data written
EEPROM.end(); // Free RAM copy of structure
}
void loadConfig() {
// Loads configuration from EEPROM into RAM
Serial.println("Loading config");
storeStruct_t load;
EEPROM.begin(4095);
EEPROM.get( cfgStart, load);
EEPROM.end();
// Check if it is your real struct
if (test.myVersion[0] != version[0] ||
test.myVersion[1] != version[1] ||
test.myVersion[2] != version[2]) {
saveConfig();
return;
}
settings = load;
}
// Empty settings struct which will be filled from loadConfig()
storeStruct_t settings = {
"",
""
};
使用saveConfig()保存设置结构
如果要从EEPROM加载,请使用loadConfig()->它将存储在设置结构中