ESP8266 firmware version

I just bought a new ESP8266-01 wifi module to use on my Pico but before I solder it onto the Pico shim I want to make sure the ESP8266s firmware is Ok. I connected it to a USB-TTL converter and powered up. On COM6 at 115200 I get the following:

AT+GMR

  AT version:0.40.0.0(Aug  8 2015 14:45:58)
  SDK version:1.3.0
  Ai-Thinker Technology Co.,Ltd.
  Build:1.3.0.2 Sep 11 2015 11:48:04
  OK

AT+RST

  OK

  ets Jan  8 2013,rst cause:4, boot mode:(3,0)

  wdt reset
  load 0x40100000, len 1396, room 16 
  tail 4
  chksum 0x89
  load 0x3ffe8000, len 776, room 4 
  tail 4
  chksum 0xe8
  load 0x3ffe8308, len 540, room 4 
  tail 8
  chksum 0xc0
  csum 0xc0
  
  2nd boot version : 1.4(b1)
    SPI Speed      : 40MHz
    SPI Mode       : DIO
    SPI Flash Size & Map: 8Mbit(512KB+512KB)
  jump to run user1 @ 1000

  rŽÃ9l€dÿ
  Ai-Thinker Technology Co.,Ltd.
  
  ready

I want to make sure the Pico can work with this firmware version and the memory 8Mbit(512KB+512KB) before soldering it on. Can somebody confirm?

It's not the Pico per se that works or does not with the ESP8266, it's the ESP8266 wifi module that has required slight tweaks to work with the different ESP8266 firmware versions out there.

So you might need to try the different modules, but having said that, you can also change the firmware of the ESP8266 either by flashing via the Pico or via your USB-TTL adapter.

I've been using the ESP8266 version 0.40 on some things recently, and it seems to work great -you just need to use the ESP8266WiFi_0v25 module (the default now).

If you do encounter any problems, please let us know rather than downgrading. It seems most modules come pre-installed with 0.40 now, so I really want to make sure it does work faultlessly.

Thank for your help guys, I'll stick with the v0.40 firmware and report any issues I run into.