axe213 rf wireless link

peter howarth

New Member
is it possible to use the axe213 / rfa001 picaxe wireless link to output out of the receiver a bcd output when the transmitter sends the same bcd input, eg say I wanted to send a bcd value of 6 which is :abcd/1248 = 0110 from the transmitter to the receiver, can the receiver output 0110 ?

another example if I send say abcd/0111 = bcd value of 14, can the receiver output 0111 on its appropriate abcd output lines? Regards Peter
 

hippy

Technical Support
Staff member
You can read four inputs, put them into an 8-bit byte, send them and have the receiver take that byte and recreate the four outputs to be the same as the inputs. So entirely possible.
 

peter howarth

New Member
You can read four inputs, put them into an 8-bit byte, send them and have the receiver take that byte and recreate the four outputs to be the same as the inputs. So entirely possible.
Thankyou, does anyone know who sells the axe213 rfa001 kit in australia. cant find a picaxe distributor that does as yet..
 

AllyCat

Senior Member
Hi,

You haven't indicated which PICaxe "Host" chips you plan to use, nor the required range for the transmission. I'm aware that shipping and Customs clearance into Australia sometimes has issues, but anyway the RFA001 is marked as "Out Of Stock" here in the UK PICaxe store. So I'll make a few "alternative" suggestions: The "Kit" you've proposed consists two simple PCBs carrying four separate (major) component parts:
Code:
Transmitter Board :  NKM 2401 Encoder Chip (Included in AXE213 kit, or available separately)
                  :  433 MHz Transmitter Module (not included)
Receiver Board    :  433 MHz Receiver Module (not included)
                  :  NKM 2401 Decoder Chip (Included in AXE213 kit, or available separately)
If you can source the AXE213 then it appears that these boards will accept different Radio modules to those supplied in the RFA001 package, if necessary.

If you can't source the AXE 213 then it shouldn't be particularly difficult to assemble some "substitute" PCBs on Stripboard or Veroboard.
If you're using most modern PICaxes, except the 08M2 (and maybe 20X2?), then you can use use the RFOUT command so do not need the NKM 2401 Encoder chip. Similarly, these chips also have the RFIN command which could replace the NKM 2401 Decoder function, but RFIN is a "blocking" command, so here the NKM2401 does have some definite advantages, if available.

Finally, there are the Transmitter and Receiver Modules which should be available from various Australian sources (search for 433MHz), particularly Ebay (look for local stock, unless you're not in a hurry), but the problem is finding a "Good" supplier. It's not easy to search for Australian stock from here in UK, so probably it's best if you can post a link to any that you think might be suitable and we can at least "cast an eye" over the specification/seller. Sometimes the modules are sold as "Matching Pairs", sometimes individually and quite often a "Reasonable" Transmitter is sold with a "Rubbish" Receiver. However, a generally reliable Receiver is known as the RXB6 , so try looking for that. ;) If you need a "significant" wireless range, then we may also need to pay attention to supply voltages, transmitter powers and antenna designs, etc..

Cheers, Alan.
 
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