difference in modules
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difference in modules
I have noticed they r now selling a Wrover module which seems to be a slight upgrade from the Wroom module.
The difference seems to be in the Wroom just has 512kb of pSRAM and the Wrover has extended it to 4mb.
Both modules have 8mb RTC RAM.
The ESP8266 module that I am currently using does have problem of not enough RAM to be able to run some packages.
Can someone explain what's the advantage of the extra pSRAM and if there are any disadvantages like it uses up GPIO pins
The difference seems to be in the Wroom just has 512kb of pSRAM and the Wrover has extended it to 4mb.
Both modules have 8mb RTC RAM.
The ESP8266 module that I am currently using does have problem of not enough RAM to be able to run some packages.
Can someone explain what's the advantage of the extra pSRAM and if there are any disadvantages like it uses up GPIO pins
Re: difference in modules
Some facts:
- ESP32 SoC has 520 kB (8 kB RTC FAST Memory included) of on-chip SRAM for data and instructions( IRAM & DRAM).
- ESP-WROOM-32 module does not have any psRAM, only the 520 kB SRAM from ESP32 SoC.
- ESP32-WROVER module has additional 4 MB of external psRAM mapped onto the CPU data space.
- psRAM is external SPI-RAM connected the same way external SPI-Flash is connected.
- When connected, psRAM uses two additional GPIO pins 16&17 which are not available for use by application.
- psRAM appears to the user application as additional RAM with some limitation (cannot be used as instruction RAM and for DMA access)
- MicroPython heap can be placed on psRAM
Code: Select all
SPI Flash FatFS mounted on partition internalfs [size: 2293760; Flash address: 1D0000]
FreeRTOS running on BOTH CORES, MicroPython task started on App Core.
Running from partition at 10000, type 0 [MicroPython].
Reset reason: Power on reset
uPY stack: 19456 bytes
uPY heap: 2049088/5536/2043552 bytes (in SPIRAM using malloc)
MicroPython ESP32_LoBo_v2.1.0 - 2017-11-21 on ESP32 board with ESP32
Type "help()" for more information.
>>> import machine, micropython
>>> micropython.mem_info()
stack: 736 out of 19456
GC: total: 2049088, used: 5776, free: 2043312
No. of 1-blocks: 19, 2-blocks: 7, max blk sz: 317, max free sz: 127697
>>>
>>>
>>> machine.heap_info()
Heap outside of MicroPython heap:
---------------------------------
Free: 199752
Allocated: 57520
Minimum free: 192648
Total blocks: 93
Largest free block: 113804
Allocated blocks: 86
Free blocks: 7
SPIRAM info:
------------
Free: 2097108
Allocated: 2097152
Minimum free: 2097108
Total blocks: 2
Largest free block: 2097108
Allocated blocks: 1
Free blocks: 1
>>>
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Re: difference in modules
Am I reading the specs right when the ESP8266 says the user heaps is only 36kb when connected to Wifi??
Does micro-python firmware also use up some of this 36kb leaving very little for my program to run??
Does micro-python firmware also use up some of this 36kb leaving very little for my program to run??
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Re: difference in modules
if I run "micropython.mem_info()" with the ESP8266 it tells me total of 36kb with 10 kb used and only 26kb available now this explains why the ESP8266 runs out of memory when doing somethings
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Re: difference in modules
You need to use frozen bytecode if you want to run larger programs on the ESP8266.
Peter Hinch
Index to my micropython libraries.
Index to my micropython libraries.
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Re: difference in modules
Moving from PC to RPi to microcontrollers I am getting a lesson on being efficient. All the number r super small, I am used to talking GB not KB
Re: difference in modules
Maybe you should post ESP8266 related questions in ESP8266 subforum.OutoftheBOTS_ wrote: ↑Sat Dec 02, 2017 10:26 amAm I reading the specs right when the ESP8266 says the user heaps is only 36kb when connected to Wifi??
Does micro-python firmware also use up some of this 36kb leaving very little for my program to run??
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Re: difference in modules
I normally do but this thread started asking about the difference between ESp32 Wroom and ESP Wrover and especially PSRAM then the thread extended into Ram of the ESP8266. I am basically looking at what the advantages of updating from ESP8266 to ESP32 and which model of the ESP32.Maybe you should post ESP8266 related questions in ESP8266 subforum.
I would expect many people that r using the ESP32 have used the ESP8266 in the past then updated to the ESP32 so I though this a good place to ask the questions.
I know that sometimes my questions may seem a little dumb but my point to being on the forum and asking the questions is to find the answers and become better educated.
Re: difference in modules
@OutoftheBOTS_
Sorry, I've only meant you could probably get better answer in another forum.
There are no dumb questions, only the dumb answers.
Sorry, I've only meant you could probably get better answer in another forum.
There are no dumb questions, only the dumb answers.
Re: difference in modules
I think that a much better plan for becoming better educated is to read the responses that are already on the forum, in the correct section, possibly using the search feature. And only if you don't find the information you look for, ask about it in a related thread. Creating your own thread should be the last resolve, when you found absolutely nothing on the topic, or when you are starting a discussion about something completely new.
Correct grammar and spelling can help a lot too, because it shows that you actually care and are willing to expend some effort, plus a lot of people who might help you are not native English speakers and will have problems understanding teenage slang or leetspeak — and thus won't answer.
Correct grammar and spelling can help a lot too, because it shows that you actually care and are willing to expend some effort, plus a lot of people who might help you are not native English speakers and will have problems understanding teenage slang or leetspeak — and thus won't answer.