Doesn't work radio transmission from Arduino Uno to Arduino Pro Micro

Question

I have Arduino Uno, Arduino Pro Micro, XY-MK-5V and FS1000A. I need transmit data from Pro Micro to Uno.

Transmitter:

 #include <VirtualWire.h>
 void setup() {
 Serial.begin(9600);
 vw_setup(2000);
 vw_set_tx_pin(14);
 }
 void loop() {
 send("Test message!"); 
 delay(2000);
 }
 void send (char *message)
 {
 vw_send((uint8_t *)message, strlen(message));
 vw_wait_tx();
 }

Receiver:

#include <VirtualWire.h>
void setup()
{
 Serial.begin(9600);
 vw_set_rx_pin(12);
 vw_setup(2000);
 vw_rx_start();
}
void loop()
{
 uint8_t buf[VW_MAX_MESSAGE_LEN];
 uint8_t buflen = VW_MAX_MESSAGE_LEN;
 if(vw_get_message(buf, &buflen))
 {
 for(int i = 0; i < buflen; i++)
 {
 Serial.print(buf[i]);
 }
 Serial.println();
 }
}

I dont know why it's doesn't works. When I changed Uno with Micro and Micro with Uno, it's worked.

But I need: Micro + transmitter FS1000A & Uno + receiver XY-MK-5V.

Please help me. I'm using this Pro Micro.

• CharlieHanson: What in particular doesn't work? You don't receive any characters? You get a garbage message?
• CharlieHanson: And which Pro Micro: the geniune SparkFun Pro Micro - which version (it says on the PCB); the A-Star variant; a cheap chinese copy?
• Gerben: Are you connecting the modules to the right pins? vw_set_tx_pin(14); looks a bit odd, if you used that on the UNO.
• CharlieHanson: On a Pro Mirco, D14 is connected to the RX LED, and nothing else; it's not broken out to either of the headers so you would never be able to use it to connect to an external component.

Answer 1

Thanks for your answers. I solved this problem, my Chinese copy has problems with power.

• Nick Gammon: Please use the edit link on your question to add additional information. The Post Answer button should be used only for complete answers to the question.
• Avamander: @NickGammon The problem was solved according to feok. This is an answer although it has not been accepted.