cyberp / at24cx Goto Github PK

Is not possible to change te I2C adress, only changing in the file AT24CX.h like shown below.
// AT24Cx I2C adress
// 80
// 0x57
#define AT24CX_ID B1010111

On function AT24CX::write
https://github.com/cyberp/AT24Cx/blob/master/AT24CX.cpp#L121
https://github.com/cyberp/AT24Cx/blob/master/AT24CX.cpp#L233
there are delay(20). This okay if you only perform some write. But if you want to perform to reset the chip (erase entire address) with big capacity, it'll take long time. Delay 1 ms should enough and it's works.

Can any guide available how to use this library with Struct in Arduino ?

I have custom struct with more than 10 fields. i need to store data using this library

I've seen this issue a few times where wire.begin is called before setup starts (IE global scoped variable), and it seems to hang on most recent Arduino builds.

Any easy fix is to defer the Wire.begin call until the first write or read attempt is made.

I'll submit a PR from my fork should you wish to accept. I've tested it on a SAMD32 board.

The info page says "uses the device with index 0 and given page size. You can select a device with given index between 0 and 8 with constructor" but I believe this should read "between 0 and 7" as there are only 8 possible addresses, not 9.

#include <AT24CX.h>

AT24C32 EepromRTC(0x57);

void setup()
{
EepromRTC.writeFloat(2,4.56);
EepromRTC.writeInt(8, 0);
EepromRTC.writeLong(13, 560);
EepromRTC.writeFloat(19, 5.56);
EepromRTC.writeFloat(25, 7.57);
EepromRTC.writeFloat(31, 7.87);
EepromRTC.writeFloat(37, 5.76);
EepromRTC.writeFloat(43, 9.88);
EepromRTC.writeInt(50, 999);

consigna_caudal = EepromRTC.readFloat(2);
AlarmDetectCount = EepromRTC.readInt(8);
totalizadorKm3 = EepromRTC.readLong(13);
M_nivel_v_CM = EepromRTC.readFloat(19);
B_nivel_v_CM = EepromRTC.readFloat(25);
L_metros = EepromRTC.readFloat(31);
Sf = EepromRTC.readFloat(37);
n_ru = EepromRTC.readFloat(43);
isVirtualManEn = EepromRTC.readInt(50);

SerialMon.print(" consigna_caudal ");
SerialMon.println(consigna_caudal );
SerialMon.print(" totalizadorKm3 ");
SerialMon.println(totalizadorKm3 );
SerialMon.print(" AlarmDetectCount ");
SerialMon.println(AlarmDetectCount );
SerialMon.print(" M_nivel_v_CM ");
SerialMon.println(M_nivel_v_CM );
SerialMon.print(" B_nivel_v_CM ");
SerialMon.println(B_nivel_v_CM );
SerialMon.print(" L_metros ");
SerialMon.println(L_metros );
SerialMon.print(" Sf ");
SerialMon.println(Sf );
SerialMon.print(" n_ru ");
SerialMon.println(n_ru );
SerialMon.print(" isVirtualManEn ");
SerialMon.println(isVirtualManEn);

RESULT:

9:31:05.938 -> consigna_caudal 4.56
19:31:05.938 -> totalizadorKm3 560
19:31:05.938 -> AlarmDetectCount 1083244544
19:31:05.938 -> M_nivel_v_CM 5.56
19:31:05.938 -> B_nivel_v_CM 7.57
19:31:05.938 -> L_metros 7.87
19:31:05.938 -> Sf 5.76
19:31:05.938 -> n_ru 9.88
19:31:05.938 -> isVirtualManEn 1092486119

For me float, long work well, but with int i have this problem. in workin in ESP32