ESP8266 Developer Zone The Official ESP8266 Forum 2018-07-09T20:52:17+08:00 https://bbs.espressif.com:443/feed.php?f=6&t=10378 2018-07-09T20:52:17+08:00 2018-07-09T20:52:17+08:00 https://bbs.espressif.com:443/viewtopic.php?t=10378&p=22021#p22021 <![CDATA[Re: Flash size]]> ESP-WROOM-S2 uses a 2 MB SPI flash connected to HSPI, working as SDIO/SPI slave, with the SPI speed being up to 8 Mbps.

Statistics: Posted by inlogic — Mon Jul 09, 2018 8:52 pm

]]> 2018-06-27T16:47:19+08:00 2018-06-27T16:47:19+08:00 https://bbs.espressif.com:443/viewtopic.php?t=10378&p=20942#p20942 <![CDATA[Flash size]]>
Got a batch of ESP-WROOM-02 modules through production that we thought were 2MB.

Reel markings are:

Code:

Product Name: ESP-WROOM-02
Manufacturer PN: 04.09.0000740
Supplier PN: M021X0132R0E
LOT No.: 201812-066
Manufacture Date: 2018-03-21


However, esptool.py flash_id command reports the flash as 4MB, C8/4016.

Some comments about interpreting the flash_id here: https://www.esp8266.com/viewtopic.php?p=31787


The supplier ID includes "32" which might signify the flash size?

Can anyone categorically confirm the flash size in these modules, according to the manufacturer or supplier PN?
And if these are 4MB, then is that temporary (as I thought all modules were 2MB nowadays?).
And what PN would be expected on the reel packaging, when the modules do contain 2MB chips... M021X0116R0E perhaps?

Any help really appreciated!

Statistics: Posted by mikeatom — Wed Jun 27, 2018 4:47 pm

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