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Replacing USR232-T

Posted: Wed Jul 15, 2015 9:01 am
by JimDrew
My company was preparing to use the USR232-T in a large scale commercial product. We are set to purchase tens of thousands of these Wifi modules per month... then I discovered the ESP8266 module.

What is the possibility of emulating the same AT commands that the USR232-T uses? They use AT+(command), very similar to the existing ESP8266 firmware. I have been able to connect and see our server. However, the USR232-T gets in and out of command mode using +++. When in pass through mode, data is sent via TCP or UDP, sending the packet after a timeout (settable by the user). The incoming data does not have a header like the ESP8266's +IPD... it's like the CIPMODE=1.

So, I would like to know the following:

Is actually at FULL list of the AT commands?
Is there a passthru mode where the TCP outgoing data can be sent by just sending data over the UART and receiving data also over the UART without having to use the CIPSEND function?
Is there a AT+WPS command or some way to invoke WPS?

If this is all possible, we will dump our PO with USR and purchase these.

If someone from this company can PM me, I would appreciate it.

Re: Replacing USR232-T

Posted: Wed Jul 15, 2015 10:14 pm
by kolban
Howdy Jim,
Rather than post to a general support forum, if you are looking to contact Espressif with business opportunites, I'd suggest contacting them directly see the following:

For your question though, it seems like the AT command processor can be augmented and overridden with the "AT APIs" documented in the Section 5 of the latest SDK. These APIs allude to the ability to replace the inputs and outputs of the existing AT commands with your own variants and even extend the command set.

The AT command processor appears to be "just a" application that is deployed to the device. What that means is that, should you need, you can write your own.

Re: Replacing USR232-T

Posted: Thu Jul 16, 2015 9:13 am
by JimDrew
Thanks, I will contact the company directly. I think this is an excellent opportunity to take a huge portion of business from USR by emulating their AT command set and functionality.

Re: Replacing USR232-T

Posted: Thu Jul 16, 2015 6:10 pm
by bjpirt
I too have made a move away from the USR modules and found the ESP to be great. If you're looking to do transparent serial to socket conversion then there are a few options for putting your own firmware on the devices (the improvement to USR is that you can actually develop your own firmware to do exactly what you want it to do). This open source project looks like it does a lot of what you're looking for, including even the +++ to start the AT command:

Hope this helps,

Re: Replacing USR232-T

Posted: Fri Jul 17, 2015 7:09 am
by JimDrew
Thanks for the info. Unfortunately, that appears to require the use of telnet to make changes. We need to make changes via the UART like the USR device. If someone was interested in making a clone of the USR configuration, we would be willing to pay for it - and I wouldn't care if it was released to the public afterwards.

Re: Replacing USR232-T

Posted: Sat Aug 01, 2015 2:30 am
by JimDrew
OK, so we have managed to create our own AT command set and passthru mode by using the Arduino IDE/code base. The only thing left is to get WPS working. Does anyone have any examples of how to implement WPS?