Electronics > Beginners

WiFi for existing Arduino

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ziplock9000:
I've been looking for a cheap and easy to use way to add WiFi capability to my Arduino UNO and then potentially a stand alone pro mini solution. After lots of Googling I keep finding the fabled ESP8266 solution in all of it's forms. The only "problem" is that every solution I find has a module that also includes its own MCU which is programmed separately from the host Arduino. Short of using the WiFi chip directly, are there no WiFi modules that plug into an existing Arduino and allow you to program that instead.. with all of the functionality you'd expect, ease of use etc?

rstofer:
https://www.adafruit.com/product/3653

This device apparently has some firmware but the majority of the code is in a provided library.  But the library is huge; it can not be used if the SD card library is in use.  Let's face it, the Arduino UNO is a tiny little CPU with an insignificant amount of memory.

Nevertheless, this gadget will work in some cases.  Or you can use a better board.

malagas_on_fire:
There are always possibilities but they not present the cheapest :


Arduino SPI WiFi Module

https://www.emartee.com/product/41983/Arduino-WiFi-Wireless-Module

Keep in mind that the processing headup in this scenario adds up to the Arduino and the ESP solution has it's 32bit microcontroller which can manage better the TCP/ IP packets

http://www.mpja.com/TTL-WiFi-Serial-Module-with-Passthrough-for-Arduino/productinfo/32692+MP/

ziplock9000:
Thanks. So you recommend I should persevere with ESP8266 with onboard MCUs to handle the I/O and TCP/IP stack.. then have the host just perform the business logic? If this is the case, do you (or anyone else) know tutorials where a host arduino talks to the ESP8266 MCU in this way (again, I can't find any)

Thanks.

cyclin_al:
If you are not fixed to the ESP8266, there are some other options.

For example, with a STM32F205 with WiFi and a Cloud service, there is the Particle Photon.
See particle.io.
It uses 3.3V logic, is mostly Arduino compatible (most Arduino libraries can be used directly without having to port them) and comes with a Cloud service to get up and running quickly.

I am not associated with Particle, just a happy user.

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