[Coco] WiFi modem.

[David Ladd]

On Thu, Jan 18, 2018 at 10:58 PM, Dave Philipsen <dave at davebiz.com> wrote:

> That's interesting stuff, Allen.  The "stock" firmware of the ESP8266 uses
> an AT command set but the actual commands are much different than the Hayes
> modem.  So I have a couple of questions: 1) How do you update the firmware
> on the ESP8266?  2) Are all iterations of the ESP8266 the same as far as
> firmware updates?
>

​Dave,  I have been using some of these:
https://www.ebay.com/itm/USB-to-ESP8266-Serial-Module-TTL-Wifi-ESP-01-CH340G-Developent-Board-Adapter/201588307377

I have one I have patched with a small wire on the GPIO0 to ground so I can
put the ESP8266-01(S) into programming mode.  Then I use the programming
software to flash the updated firmware.

​Now on my unit I upgraded to the most current firmware as of 3 months ago
at:
http://www.espressif.com/en/products/hardware/esp8266ex/overview

I was able to also put the lock the adapter to a specific WiFi router and
also set it to always connect to a static IP and port on startup in
pass-through mode.

Example of config:
​AT+CWMODE_DEF=3
AT+CWJAP_CUR="SSID","SSID_PASSPHRASE"
AT+SAVETRANSLINK=1,"IP_OF_DW_TCP_SERVER",PORT_OF_DW_TCP_SERVER,"TCP"
​
​The only drawback I had to this setup is I had to reflash the device to
get out of this mode.  I couldn't get it to return to command mode, but it
did at least work well as a pass-through device.

Then I got busy on another project and haven't tested it with a MAX3232
chip and connecting to the bitbanger port yet to see if I can get it to
work as a WiFi/TCP serial bridge.​



>
> I have a few of the ultra-cheap Chinese eBay ESP8266 boards but I've
> noticed that there are some other slightly different designs out there too.



​The ESP8266-01S seems to be the newer version of the module with a LED and
I think more flash storage.​



>
>
>
> Dave
> ​<cut>​
>

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