How to Test RF Transmitter and Receiver Before Programming

Hello guys,

Do you have RF transmitter and receiver not working after you programmed?

Do not worry, you can use this techniques to check your devices.

Step 1:

You can simply test if both are working or not.

connect both as shown in the image.

when you connect the data pin to 5V is mean on (send signal 1).

and, when you connect it to the ground is mean off (sending 0).

If you see in another side the LED is flashing according to 1 and 0, is mean that your device is working.

Now you can start programming :)

Comments

[jawor123]

I'm strugling to test my modules :(
Please see attached photos and let me know what is wrong.
(white cables are for GND, red ones for +5V, orange is for DATA in receiver and yellow is a 'switch' in transmitter)
I connected te VCC and GND of transmitter to +/- 5V, then I connected VCC and GND of receiver to 5V. I connected LED (along with 330R) to DATA of receiver and to GND.
LED is lighting all the time na matter what I do with transmitter (I tried connecting DATA of transmitter to +5V and to GND - nothing happens). I beg you - help me :) (I'm sitting with this for few hours now :( )

[NabeelLass]

Check the + and - rails.
Because some in breadboards the rails are not fully connect.

or you can connect all + wires close to each other and for the grounds too.

[aswinth]

Hi,

So i followed the above steps, my LED always blinks on rec. side. When i connect my data pin to Vcc it becomes bright for a second and strarts to blink again. when i connect data to gnd nothing happens pls help....

[subodhsadh12]

Please give code these circuit

[yameen93]

Damaged rx

[subodhsadh12]

Please give code these diagram

[ahmedtayar9070]

Hello can anyone help me.. I followed the previous steps but the led alwayes blinks
If transmitter connected or not the led start blinks after the reciever connected to vcc and GND
I used four different modules from different places and the result was the same always

[NabeelLass]

Hi,
The data pin is important. When you connect it to VCC is means send signal 1 to the RX, and when you connect it to GND is means 0.
So, VCC and GND are connected to the battery source.

[ahmedtayar9070]

Thanks for your help this is my connections and i draw the circuit diagram as i do... I tried four different rf modules and the same ruselt

[NabeelLass]

I can see you connected the GND permanently which is not right. Please remove the connection circuit from the ground.
So, make sure to not connect GND and VCC from the battery to the Data pin.

[ahmedtayar9070]

You mean not connect GND and VCC from the battery to the Data pin.... And use push buttons to connect GND and vcc to data pin in the transmitter... That's what you mean?!

[NabeelLass]

Hello,

The uLED should be on when you connect data pin in the Tx with +5V.

I just tested again and it is okay.

[Azim hossainR]

Great idea to test RF module simply. My module is flashing when gone to 1 and when gone to 0. Thanks for this tips.

[tomatoskins]

That's a nice little instructable. Thanks for sharing and welcome to the community!