Arduino cheap wifi

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I also had an IR led. After some researches on the web for libraries, I used an existing one to create a small and easy IR protocol to send data between my two cards. Of course, the range and the baud rate are limited, and you must keep the cards in "eye contact". Here is a step by step presentation of this system.

In my example, a temperature and humidity sensor will be used for data transmission DTH The data will be sent to the other Arduino and sent to a computer. Feel free to use and modify this example for your own projects! I'll use an Uno and a Mega in this project. If you don't have it, you can simply sent a demo string.

I encourage you to read it! The main IR libraries are here. Please download and install them in the Arduino "Libraries" folder. The emitter is easy to build. You just need to wire a led with a ohms resistor, and use an other pin to connect the sensor. The Arduino pin used for the led is the 3. See the attached pics. Watch out, the Fritzing illustration doesn't fit my real module. If you have the naked chip, you will need more parts!

See the DTH11 datasheet. Just check the code. The code is attached. Compile it and upload in on the card. Ok, for the receiver, I have a ready-made reception module 38 kHz. It was used with a small remote control. The receiver has a built-in LED, so we will be able to check if incoming data is received. The receiver sketch is attached. The incoming data is collected then sent to the serial port.

In this last step, we will turn everything on and check if it works. Of course you can also use the Arduino Serial Monitor, the result will be the same! Of course, it uses the USB connection, through the virtual serial port. Remember, you can check the LED by using a mobile phone camera. My receiver module has a build-in LED that blinks in case of incoming data. Make sure the baud-rate is correct in my example , then click Open. It should work! Ok, it's quite stupid to sent a whole sentence.

It's slow, and it may be better to sent only the two variables temperature and humidity. Remember that this Instructable is only an example! Here we are, a simple solution to send mono-directional data between two Arduino cards. Of course, real wireless solutions MHz modules, Bluetooth or Wifi are also perfectly suitable. Any link or suggestion? Sorry i am new to wifi field. I do not have any experience with the router you have and checking the link seems dlink stopped support for it in , as suggested before invest in an Ethernet shield for the Arduino and save yourself a lot of trouble.

I just asked for more info. I did reply but for reasons unknown it's down at the bottom of this thread. Apr 30, I will be cracking open the case in the near future to see if I could access the serial port connections. For anyone else interested in saving a couple extra bones, check out the tl-wrn this instructable uses the the tl-wrn See the OpenWRT wiki page for the to see why it's not supported. Really cool instructable.

Thanks, it should not matter which firmware you have , as long as your device can be configured to a client mode via the firmware ui. By ddoss Key Services China Follow. About: I am a hippie at heart , just got back into electronics after about 30 years away from it, by playing with an Arduino. More About ddoss ». Participated in the Arduino Challenge View Contest.