Where communities thrive


  • Join over 1.5M+ people
  • Join over 100K+ communities
  • Free without limits
  • Create your own community
People
Repo info
Activity
Ikbel
@ikbelkirasan
Max EEPROM size is 4096 bytes.
Tejas H
@CodingCreate101
Alright. Thank you.
And what's exactly Arduino IDE saying. I couldn't complete understanding those terms.
And also, 1 character is considered as 1 byte right?
Ikbel
@ikbelkirasan
No problem. Yes 1 character is 1 byte.
Sketch size is the size of the compiled firmware on the Flash.
Global variables size if how much RAM is assigned to your global variables.
Your ESP should have a total of around 80KB of RAM.
Tejas H
@CodingCreate101
Thank you, again.
So, to clarify myself, Dynamic memory is RAM.
But what about program storage space? It's the ROM. (right?) So, whatever EEPROM I am using, is a part of ROM. Am I right? So, if I use all the 4096bytes of EEPROM, and also if I write big code in ROM, are those two memories gonna interfere with each other?? If so, how to prevent it?
Clemens Kirchgatterer
@everslick
no, they are completely unrelated
Ikbel
@ikbelkirasan
program storage space is on the flash. the firmware has a known start and end addresses. the eeprom is mapped to another memory space. so there will be no conflict.
Clemens Kirchgatterer
@everslick
even though the the EEPROM is not really an EEPROM chip, it is in another part of the flash chip (as @ikbelkirasan pointed out).
Ikbel
@ikbelkirasan
btw it's not a real eeprom. everything is on the flash. ESP uses an eeprom emulation.
yes exactly
Tejas H
@CodingCreate101

btw it's not a real eeprom. everything is on the flash.

Yeah, this is why I had that doubt. Thank you guys. :)

Ikbel
@ikbelkirasan
Happy to help :)
Tejas H
@CodingCreate101
:sparkles:
enriquecml
@enriquecml
how much limit size of EEPROM, ESP 8226 with 4MB?
maybe 3MB offset ?¿ without spiff,and swap memory for OTA updates...
ok are 4096 bytes
for design
Tejas H
@CodingCreate101
Hello
For Rtc.SetDateTime(compiled);
what's the datatype of compiled? Is it timestamp?
enriquecml
@enriquecml
where saw this method for RTC?
RTC class on esp8226 (write/read)
mainly
ESP.rtcUserMemoryWrite(offset, &data, sizeof(data)) and ESP.rtcUserMemoryRead(offset, &data, sizeof(data)) allow data to be stored in and retrieved from the RTC user memory of the chip respectively. Total size of RTC user memory is 512 bytes, so offset + sizeof(data) shouldn’t exceed 512. Data should be 4-byte aligned. The stored data can be retained between deep sleep cycles. However, the data might be lost after power cycling the chip.
but you refer RTC module
extern
enriquecml
@enriquecml
compiled is intance of class
@CodingCreate101 // RtcDateTime compileDateTime(DATE, TIME);
RtcDateTime(const char date, const char time);
Tejas H
@CodingCreate101
Ohhh right.. how could I miss such obvious thing
enriquecml
@enriquecml
hehe
Tejas H
@CodingCreate101
Thank you
enriquecml
@enriquecml
pair programming ?
haha
probonopd
@probonopd
hi all, is there a way to make server.onFileUpload upload to a fixed filename (instead of using what the client sends)?
  server.onFileUpload([](AsyncWebServerRequest * request, const String & filename, size_t index, uint8_t *data, size_t len, bool final) {
    if(!index){
      // filename="cache.gco" ; // Override what the client sent as the filename - DOES NOT WORK
    }
  });
I am using ESPAsyncWebServer by @me-no-dev
Victor Tseng
@Palatis
well that filename is the client tells you what file it sends
you get to decide where to store it.
for example user sends you C:\Users\Palatis\blah.jpg
and you can't modify it because it's a const String &.
probonopd
@probonopd
i know that the client sends it, but I want to override what the client sends
and if i leave away the "const" then it doesn't compile
Victor Tseng
@Palatis
you can't, that desicision is on the client.
probonopd
@probonopd
well, the client sends a name but the server can certainly ignore what the client sends