433MHz superheterodyne transmitter and receiver modules. (my bad)

[Poty]

Good evening.
I´m trying to establish a link between 2 microcontrollers (PIC 12F508), using cheap RF modules (Those used with arduino), and bought 2 kinds of them.... a FS1000A with its receiver and a WL102 341 (superheterodyne) with its receiver.
I know... a lot of people will strt yelling "USE AN ADVANCED MICRO, WITH AN UART!!!!"... and I´ll agree with all of them... but I only have 15 x pic 12F508... so, it is the one that I´ll use.
Best of all, I was able, (with de FS1000 couple), to interconnect 2 protoboards till 3m distance, and using 3 different on/off switches with the transmitter, and 3 different leds in the receiver.
I have to recgnize that I don´t know even a little about radio transmission, only the use of a carrier frequency, and the ASK/OOK protocol which simplifies the data transmission. That´s all.
So, with this equipment, started to try different frequencies of data transmission over that carrier, using the NEC (infrarred led remote control) protocol, and IT WORKED with the FS1000 couple, on a distance up to 3m... Then, when trying to enhance this, stopped working and never connected again... Well, I have 3 couples of each pair, and tried to make it work again, and nothing... So I decided to use the WL102 couple... and worst... Not started even once.
As a try, I conected microcontrollers directly, to evaluate discrepancies between emitter and receiver programs (frequencies, etc), and all was ok, so I discarded problems with the programming step. Of course, there is always a variable, which is the time lenght of each transmitted pulse, wich can affect the performance of the couple, and I´m testing this right now... But just in case any of you had tried this before, and have a suggestion (besides the UART thing), I´ll accept and thank any one.
I´m trying to make it work with 3.3V, and later use higher voltage on the module that accept this.
Of course... you´ll tell me "just buy some TX/RX devices from amazon for a couple of bucks"... and yes, if I were in a first world country, I´ll just don´t even hesitate in doing that... but here, in the 6th world, I have to buy one of those (for only one channel) in around U$S24.50... which is a robbery...
So, thanks in advance.
Regards.

[ero]

Most probably your problem is the level difference between 3,3V logic and 5V logic.

Check the following link and try to make or buy similar circuit.
https://www.sparkfun.com/products/12009
You can look for also some simple solutions made by some resistors and transistor also. There are a lot in internet.

https://www.google.com/imgres?imgurl=https%3A%2F%2Fwww.gadgetronicx.com%2Flogic-level-converter-5v-3-3v%2Fvoltage-level-converter%2F&imgrefurl=https%3A%2F%2Fwww.gadgetronicx.com%2Flogic-level-converter-5v-3-3v%2F&tbnid=F2Q_htzDGnnvWM&vet=12ahUKEwi5_onIjb_8AhXUxwIHHfI-CdwQMygEegUIARCaAQ..i&docid=9XrSXhdD3afswM&w=768&h=629&q=level%20converter%205v%20to%203.3v&ved=2ahUKEwi5_onIjb_8AhXUxwIHHfI-CdwQMygEegUIARCaAQ

Ero

[pushycat]

FS1000A module TX works on a wide voltage 2.5v to 12v, but even for testing use the module on the same voltage used for the interfacing microcontroller. (5V) But the same gives best range on 9-12 volts . On the Receiver module, 5v is mandatory.

[titi]

Hi Poty,

here is some advices using cheap RF modules.

http://www.romanblack.com/RF/cheapRFmodules.htm

Best regards.