433Mhz and serial comunication

I'm having a mental stuck

I'm using the serial communication to send data using a 433mhz TX module this MCU also reads the values of a few sensors but the reciver gets noise when the reciver is reading the sensors. what can I do.

I have the idea of keep the serial TX HIGH and LOW until the MCU get the data form the sensors, but how keep the serial sending dummy data while the MCU finish to read the data and send it to the TX .

You need a library that does all the toggling and reading with a certain protocol.
The VirtualLibrary is by far the best library for it.
http://www.airspayce.com/mikem/arduino/VirtualWire/