WiFi module

On 23/2/22 12:48 am, Dimiter_Popoff wrote:
> On 2/22/2022 14:23, Bernd Linsel wrote:
>> On 22.02.2022 12:59, pozz wrote:
>>> I need to develop a custom board with WiFi connectivity and a 
>>> UART(RS485). The UART will be connected to a proprietary device with 
>>> a proprietary protocol, no problem on this.
>>>
>>> The board should connect to a MQTT server through WiFi.
>>>
>>> I don't know if I will choose a "transparent" WiFi module, 
>>> implementing all TCP/IP stack and MQTT protocol on the host 
>>> controller, or choose a "full-featured" WiFi module that integrates 
>>> all the protocols I need and TCP/IP stack.
>>>
>>> Besides this, the most important issue is how to configure the WiFi 
>>> module with network settings (network name, password and so on). This 
>>> step is crucial, because it should be as simplest as possible.
>>>
>>
>> Hello pozz,
>>
>> you can find some budgetable modules here: 
>> https://www.wiznet.io/product/wifi-module/
>>
>> Nearly every WiFi module supports parallel operation as a station and 
>> as access point. Also, if they offer a lightweight TCP stack (mostly 
>> limited to 1..4 parallel connections), you can choose to use them on a 
>> lower level, e.g. PHY, IP... and implement the upper protocol layers 
>> yourself.
> 
> Is there a documented way to use some of these (I am looking at the PCIe
> one) *without* having to use its tcp stack, so one could send/receive
> IP packets, similar to the way it is done via Ethernet or ppp?

Espressif supports ESPNow:

"ESP-NOW is a fast, connectionless communication technology featuring 
short packet transmission. ESP-NOW is ideal for smart lights, remote 
control devices, sensors and other applications."

It "applies the IEEE802.11 Action Vendor frame technology", whatever 
that is. Listed here: <https://en.wikipedia.org/wiki/802.11_Frame_Types>

<https://www.espressif.com/en/products/software/esp-now/resources>