How to Test RF Transmitter and Receiver Before Programming

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Introduction: 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 :)

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    14 Comments

    0
    jawor123
    jawor123

    11 months ago

    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 :( )

    DSC_0412.JPGDSC_0413.JPGDSC_0414.JPG
    0
    NabeelLass
    NabeelLass

    Reply 11 months ago

    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.

    0
    aswinth
    aswinth

    6 years ago

    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....

    0
    subodhsadh12
    subodhsadh12

    Reply 1 year ago

    Please give code these circuit

    0
    yameen93
    yameen93

    Reply 2 years ago

    Damaged rx

    0
    subodhsadh12
    subodhsadh12

    1 year ago

    Please give code these diagram

    0
    ahmedtayar9070
    ahmedtayar9070

    2 years ago

    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

    0
    NabeelLass
    NabeelLass

    Reply 2 years ago

    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.

    0
    ahmedtayar9070
    ahmedtayar9070

    Reply 2 years ago

    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

    IMG_20200426_105228.jpgIMG_20200426_120542.jpgIMG_20200426_105224.jpgIMG_20200426_121013.jpgIMG_20200426_120557.jpgIMG_20200426_120618.jpgIMG_20200426_121810.jpg
    0
    NabeelLass
    NabeelLass

    Reply 2 years ago

    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.

    0
    ahmedtayar9070
    ahmedtayar9070

    Reply 2 years ago

    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?!

    0
    NabeelLass
    NabeelLass

    6 years ago

    Hello,

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

    I just tested again and it is okay.

    0
    Azim hossainR
    Azim hossainR

    6 years ago

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

    0
    tomatoskins
    tomatoskins

    7 years ago on Introduction

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