EEPROM.write(0,132); 从EEPROM读取数据,具体格式为:EEPROM.read(<地址>), 其中地址是你之前写入数据的地址,返回一个0-255的无符号整数,uint8_t. 如果在读取前没有被写入数值,默认值为255。 uint8_tvalue=EEPROM.read(0); 除了无符号整数ESP32的EEPROM库同样支持读写Byte、Char、Short、Long、Long64、Float...
#include "EEPROM.h" void sendSerial1(String str, bool addline = true); typedef void(*funcSlice)(); #define ROM_STRING_SIZE 16 #define ROM_INT_SIZE 4 enum TaskType { TaskTypeLed, TaskTypeParse, TaskTypeSerialRecv, TaskTypeUDPRecv, TaskTypeCount }; enum Status { LedStatusOff = HIGH...
data[i]); } EEPROM.write(data.length(), '\0'); // 在字符串末尾写入空字符,表示字符串结束 EEPROM.commit(); // 提交更改 } void loop() { // 从EEPROM中读取字符串并打印 String data; char ch; int i = 0; while ((ch = EEPROM.read(i)) != '\0') ...
EEPROM is implemented using a single blob within NVS, so it is a container within a container. As such, it is not going to be a high performance storage method. Preferences will directly use nvs, and store each entry as a single object therein. 注意,NVS为非易失性存储,是在FLASH中开辟出...
17 Serial.print(byte(EEPROM.read(i))); Serial.print(" "); //直接读出数据 18 } 19 Serial.println(); 20 Serial.println("writing random n. in memory"); 21 } 22 23 void loop() 24 { 25 int val = byte(random(10020)); 26 EEPROM.write(addr, val); ...
Arduino EEPROM解释-记住上一次LED状态 ESP32使用偏好库永久保存数据 使用首选项库永久保存数据 Preferences.h 库 当您在Arduino IDE中安装XIAO ESP32C3板时,此库将自动“安装” 最好使用Preferences.h库来通过键值对存储变量值。永久保存数据对以下方面很重要: ...
EEPROM.write(0, pictureNumber); EEPROM.commit(); } String a1 = "{\"id\":\"1189401707\",\"version\":\"1.0.0\",\"method\":\"123\",\"params\":{\"img\":\""; String a2; String a3 = "\"}}"; char data[4104]; // 将图片分为不超过 800 通过 MQTT 发送出去 ...
问ESP32将字符串写入EEPROMEN1.导入命名空间 xmlns:clr="clr-namespace:System;assembly=mscorlib" 2....
i2c_master_write_byte(cmd, (AT_ADDR << 1) | I2C_MASTER_READ, ACK_CHECK_EN);i2c_master_...
EEPROM.write(startAddr + i, '\0'); EEPROM.commit(); } String readStringFromFlash(int startAddr) { char in[128]; // char array of size 128 for reading the stored data int i = 0; for (; i < 128; i++) { in[i] = EEPROM.read(startAddr + i); ...