Hi,
I purshased a 315MHz sM4 receiver #1096 with a 1 Button RF Keyfob #1392 from an european reseller (electronic shop from luxembourg).
They don't seem to work properly. Alimented from a 5V pin from a raspberry pi, no signal is coming out of any pin (VT, D3, D2, D1, D0) when the keyfob is pressed.
I tested it with antenna coiled and uncoiled as suggested in other threads.
Current is coming in the 5V and out the GND pins correctly.
Unfortunatelly when I received the package I plugged the 5V and VT pins first (before grounding the receiver) and, as I noticed immediatly, the current shortened from the VT pin to ground (since it lighted the LED).
Is it possible to kill the receiver this way ?
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May the problem comes from the keyfob ?
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Since I need to buy another one, I'm considering ordering from you directly. Do you know the shipping delays to France ?
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Thanks in advance !
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315MHZ & Keyfob shortened ?
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Please be positive and constructive with your questions and comments.
- qu3nt1n
- Posts: 4
- Joined: Wed Jun 18, 2014 6:23 pm
315MHZ & Keyfob shortened ?
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- Franklin97355
- Posts: 23940
- Joined: Mon Apr 21, 2008 2:33 pm
Re: 315MHZ & Keyfob shortened ?
Could you post a clearer picture of your connections or a drawing of how things are connected? The LED does not look like it is hooked up correctly.
- qu3nt1n
- Posts: 4
- Joined: Wed Jun 18, 2014 6:23 pm
Re: 315MHZ & Keyfob shortened ?
Here is another picture of the circuit. I think everything is plugged correctly.
I tested both leds and resistance are working correctly and the led is plugged in the right direction (+ to the pin, - to the ground).
- Franklin97355
- Posts: 23940
- Joined: Mon Apr 21, 2008 2:33 pm
Re: 315MHZ & Keyfob shortened ?
Your resistor is connected to VT, it should be connected to D0 through D3
- qu3nt1n
- Posts: 4
- Joined: Wed Jun 18, 2014 6:23 pm
Re: 315MHZ & Keyfob shortened ?
Well, I also tested every pin from D0 to D3 but I read (in some other post from here) that VT send current whenever a pin was activated. It doesn't work either from those pins :(
- Franklin97355
- Posts: 23940
- Joined: Mon Apr 21, 2008 2:33 pm
Re: 315MHZ & Keyfob shortened ?
Please contact your reseller and let him know your problems. Perhaps linking to this post will help.
Please be positive and constructive with your questions and comments.