Description
Hello after adding bord by board manager from http://arduino.esp8266.com/stable/package_esp8266com_index.json
Hardware
Hardware: Wemos D1 mini pro
Description
Problem description
Hello after adding bord by board manager from http://arduino.esp8266.com/stable/package_esp8266com_index.json
got error : 'class EEPROMClass' has no member named 'length'
before compilation was successful.
Looks like EEPROM.h is old
Settings in IDE
Module: Wemos D1 R2 & mini
Flash Size: 4MB/3MB SPIFFS
CPU Frequency: 80Mhz
Flash Mode: ?qio?
Flash Frequency: ?40Mhz?
Upload Using: COM8 SERIAL?
Reset Method: ?ck / nodemcu?
Sketch
/*
- EEPROM Read
- Reads the value of each byte of the EEPROM and prints it
- to the computer.
- This example code is in the public domain.
*/
#include <EEPROM.h>
// start reading from the first byte (address 0) of the EEPROM
int address = 0;
byte value;
void setup() {
// initialize serial and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
}
void loop() {
// read a byte from the current address of the EEPROM
value = EEPROM.read(address);
Serial.print(address);
Serial.print("\t");
Serial.print(value, DEC);
Serial.println();
/***
Advance to the next address, when at the end restart at the beginning.
Larger AVR processors have larger EEPROM sizes, E.g:
- Arduno Duemilanove: 512b EEPROM storage.
- Arduino Uno: 1kb EEPROM storage.
- Arduino Mega: 4kb EEPROM storage.
Rather than hard-coding the length, you should use the pre-provided length function.
This will make your code portable to all AVR processors.
***/
address = address + 1;
if (address == EEPROM.length()) {
address = 0;
}
/***
As the EEPROM sizes are powers of two, wrapping (preventing overflow) of an
EEPROM address is also doable by a bitwise and of the length - 1.
++address &= EEPROM.length() - 1;
***/
delay(500);
}