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Topic: Cheapest WiFi Module? (Read 18 times) previous topic - next topic

NI$HANT

Hi fellows, ANybody here aware of the cheapest WiFi modules that would be around there? and would have suffiecient beef to be handled by a standard 8-Bitter like ATmega's?
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magagna

This is the least expensive one that I know about (US $34.95):

https://www.sparkfun.com/products/10822

http://www.mouser.com/ProductDetail/Roving-Networks/RN171XVW-I-RM/?qs=sGAEpiMZZMsSm7LhMeloEDuLr0wvUPSm

You speak to it via a serial link; I have had no problems talking to it using the software serial library.

Good luck!
http://en.wiktionary.org/wiki/magagna <-- My last name.  Pretty apt.

Papa G


NI$HANT

These are still expensive in comparison to this ElectricIMP module >> http://electricimp.com/ a complete single module consisting of Cortex-M3 and WiFi at about 25 USD, How they are able to get this price?
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magagna

That's pretty interesting. I hadn't seen that before, thanks.

The cheapest I can find for it is $29.95 at Amazon, have you seen it for less? I may have to order one to check it out.

I'm not sure why there aren't cheaper WiFi solutions. Economies of scale?

Thanks again for the Electric Imp pointer.
http://en.wiktionary.org/wiki/magagna <-- My last name.  Pretty apt.

electricteardown

Check ebay or other online shops for the nrf24l01 - should be about $2-3 :)

Sacman

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Check ebay or other online shops for the nrf24l01 - should be about $2-3 smiley


The Nordic is a great module but it is not a completely functional plug and play module in that format. It requires peripheral components including some sort of PCB, adapter board, or socket to hold that dinky 4mm chip.

The biggest expense associated with building these types of functional modules is the PCB. If you total all of the components needed at wholesale price its probably about $5. So yeah its economics of scale as mentioned above. If you build ten of them you are going to pay a lot more than if you build 100,000 of them. This becomes really clear if you have looked into having PCB's manufactured either raw or populated.

Luck,

Wade

Bajdi

You can find functional nRF24L01 modules on Ebay for less then 2$: http://www.ebay.co.uk/itm/2-4Ghz-nRF24L01-RF-Transceiver-Module-ISM-Breakout-/271095195228?pt=LH_DefaultDomain_0&hash=item3f1e88665c

I have played with them and used them in my robots. Big difference with a Wifi chip though...

oric_dan

I don't think nrf24l01 is wifi.

xvjeko


Bajdi


I don't think nrf24l01 is wifi.


Correct, the nRF24L01 is a wireless transceiver that uses the 2.4GHz band. Same frequency as Wifi but that doesn't make it a Wifi device. I have a setup at home were an ATmega328 with some sensors connected to it sends an array of data to an ATmega1284 through 2 nRF24L01 modules. That ATmega1284 sends data over I2C to an Arduino Uno with an Ethernet shield. The Uno writes that data to an sd card and runs a small webserver. Sounds complicated, but it wasn't very difficult to program. And I'm very new to micro controllers and programming.

Sacman

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You can find functional nRF24L01 modules on Ebay for less then 2$


I stand corrected! Awesome find. I'm tempted to buy 10 of them just to have them around!

Luck,

Wade

NI$HANT

I already have 2.4 GHz supporting nordic's nrf IC's but the reason I think they cant be used because they aren't 802.15.4 protocol supporting, what you folks say? have you used it as a WiFi?
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Bajdi

They do NOT support Wifi. It's much simpler chip then Wifi chips... There is a reason they are that cheap :)

iluvplanes

I guess the arduino wifi shield is too expensive.... maybe use and XBee?

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