RF Remote FS1000a With Picaxe

Axel87

Senior Member
Hello all,

Working on another project. 12V actuators that I would like to activate with this RF module.
The circuit idea I have in my head consists of a 08m2, 5 or 12v relay?, FS1000a RF module
Did a search on the forum and didnt pull up anything with solid data to help.
Does anyone have experience with these or should I look to upgrade?
Thanks again!

I could buy a premade kit for this application, but wouldent be learning anything about our wonderful picaxe would I? ;)
 

srnet

Senior Member
A link to a datasheet would help us.

And a description of what it is your are actually trying to do, as no-one can judge whether you need to upgrade, until for instance you say how far away the actuators are going to be, 1M or 1kM ?
 

Axel87

Senior Member
I am not real picky on distance approx 50ft? anything less that 5 ft would be annoying but would work.
In my idea, the picaxe will be activating the 12v relays already in the vehicle for the actuators. (circuit for this is still hypothetical)

Here is how the actuators are wired in the vehicle thus far and working great-
http://www.the12volt.com/relays/relaydiagram49.html

Below I what I have gathered on this chip thus far.
It seems a couple of people have used these with Arduino's but I havent found anyone attempting it with a Picaxe yet.

Arduino blog- http://www.glacialwanderer.com/hobbyrobotics/?p=291
Datasheets(not sure these are exact to what I was looking at)
Transmitter- http://www.sparkfun.com/datasheets/Wireless/General/MO-SAWR.pdf
Reciever- http://www.sparkfun.com/datasheets/Wireless/General/MO-RX3400.pdf

This guys blog has a wiring diagram and how he wired it up to the arduino-
http://vanceance.blogspot.co.at/2014/01/xy-mk-5v-arduino.html

This is the module I was looking at to purchase-
http://www.ebay.com/itm/315Mhz-WL-RF-Transmitter-Receiver-Module-Link-Kit-for-Arduino-ARM-MCU-Wireless-/190938367165?pt=LH_DefaultDomain_2&hash=item2c74d044bd

These are the remotes I had in mind-
http://www.ebay.com/itm/Wireless-Electric-Garage-Gate-Door-Remote-RF-315MHz-2-Channel-Excluding-Battery-/221391555583?hash=item338bf70bff
 
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Axel87

Senior Member
Unless I am mistaken, I cannot use just the 433MHz trans/receiver kit to accomplish this task correct?
I must also use the NKM2401? or Axe213?
The AXE213 kit seems a bit spendy for this project. Maybe at a later date when I need to send/receive more data, it could come in handy. But I would still imagine I would build it myself, seems like a guy could purchase these parts separately and save a quite a few bucks.
 

Goeytex

Senior Member
315Mhz is legal in the US. Very common and very cluttered frequency. Should be OK @ 50ft.

The Key remotes have an (unknown type) encoder chip. These are for use with a door opener / actuator with a matching decoder chip. The key remotes will not work with modules in the last link as these receivers have no decoder chip. It may be possible to use Key remotes with a bare receiver while using a Picaxe to decode the encoded signal, but you will need need to know the encoder algorithm.

Unless I am mistaken, I cannot use just the 433MHz trans/receiver kit to accomplish this task correct?
I must also use the NKM2401? or Axe213?
You are mistaken,

The NKM2401 does automate the preamble, does Manchester encoding / decoding to balance the signal, and sends and tests a checksum to verfy data. But it has nothing to do with access codes / encryption. The NKM2401 does provide for a more robust RF link with these dumb modules but is not absolutely necessary for what you want to do. But what's deal here? They are < $1 each from Rev Ed.

You can use the Picaxe to do most of what the NKM2401 does , and in your application I do not see where serin blocking is a problem... unless you want Picaxe to do more than process the received RF data and activate the door locks.
 
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srnet

Senior Member
Legalities, bla. Who cares ;)
Its only being used for a split second to activate a door lock.
Quite a lot of people do care, and whats legal in which country is useful background information for forum members.

Choice of frequency is often important for practical reasons also, as you want to avoid frequencies where there is (potentially) a lot of interference from other users.
 

Axel87

Senior Member
"The NKM2401 does provide for a more robust RF link with these dumb modules but is not absolutely necessary for what you want to do. But what's deal here? They are < $1 each from Rev Ed. "
I guess I was talking about the whole AXE213 kit. It seems overkill for my project.
I apologize for the oversight on the legalities srnet. you are correct, that information could be valuable to others.

If I understand correctly- I can use the picaxe to decode the Key Remote, but would need to find the encoder algorithm. But I could still use these 433MHz kits.
:/ I wouldent have a clue were to find this information.

Maybe its best to start with the AXE213 at a higher cost to get my foot in the door with RF ?
Unless anyone else has a better recommendation?
All I am after at this point is simple High/low commands via RF basically. Somewhere down the road I would like to implement serial communication.
 

Goeytex

Senior Member
2 8M2's, The AXE213, and a pair of modules from Tech Supplies would be a good way to go.

Alternately you could get 2 08M2's, 2 NKM2401 chips, and a TX/RX pair of 315MHz ASK modules from wherever.

Another option is just the 2 8M2's and a TX/RX pair of ASK RF modules.

And even another option is a a pair of 14M2's and a TX/RX pair of ASK Modules. The 14M2 Picaxe has the NKM2401 code built in with the RFIN & RFOUT Commands.

Any of these combinations will work with the proper code and you WILL be using serial communication with this RF stuff.
 

lbenson

Senior Member
>The 14M2 Picaxe has the NKM2401 code built in with the RFIN & RFOUT Commands.

Note that RFIN is blocking. If that is a problem for your application, you can use an NKM2401 chip with the 14M2 to achieve a non-blocking solution (or use the Goeytex option of 2 08M2's, 2 NKM2401 chips, and a TX/RX pair of 315MHz ASK modules).
 

John West

Senior Member
A suggestion. As my car's door lock/unlock remote control died I've been thinking of using a PICAXE IR system to do the job. It's cheaper and easier than RF, and I'd think even more reliable.
 

Axel87

Senior Member
A suggestion. As my car's door lock/unlock remote control died I've been thinking of using a PICAXE IR system to do the job. It's cheaper and easier than RF, and I'd think even more reliable.
I had honestly debated that, but just thought that a IR remote control for my car would just be too cheesy ;) lol

Would these ASK modules suffice?
http://www.ebay.com/itm/315Mhz-RF-Transmitter-Module-and-Receiver-Link-Kit-for-Arduino-ARM-MCU-ASK-OOK-/261226085576?pt=LH_DefaultDomain_0&hash=item3cd249bcc8

And if i may, what is the difference between these modules and the ones posted earlier?
Better Reliability, range? Or just easier to interface with the picaxe?

Also, I still would not be able to use the Button key I have for the last module with this?
I cant seem to find a simple 2 button key for these ASK modules.

Thanks for everyone's input!
 

papaof2

Senior Member
A suggestion. As my car's door lock/unlock remote control died I've been thinking of using a PICAXE IR system to do the job. It's cheaper and easier than RF, and I'd think even more reliable.
There are some relatively inexpensive after-market lock/unlock modules available in surplus. Not sure who currently has them, but try these vendors:

http://www.mpja.com/

http://www.allelectronics.com/

http://www.skycraftsurplus.com/index.asp

http://www.surpluscenter.com/
 

tony_g

Senior Member
I had honestly debated that, but just thought that a IR remote control for my car would just be too cheesy ;) lol

Would these ASK modules suffice?
http://www.ebay.com/itm/315Mhz-RF-Transmitter-Module-and-Receiver-Link-Kit-for-Arduino-ARM-MCU-ASK-OOK-/261226085576?pt=LH_DefaultDomain_0&hash=item3cd249bcc8

And if i may, what is the difference between these modules and the ones posted earlier?
Better Reliability, range? Or just easier to interface with the picaxe?

Also, I still would not be able to use the Button key I have for the last module with this?
I cant seem to find a simple 2 button key for these ASK modules.

Thanks for everyone's input!

some manufacturers used i.r before going solely to rf, many years ago i had a 97 ford mondeo, that used an ir remote keyfob, the sensor was mounted just above the door handle and flush, it was barely noticeable unless you knew to look there.

even in direct sunlight it was very reliable and had a good usable distance to unlock/lock


tony
 
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