Circuit diagram for this Arduino transmitter and receiver is shown below. Connecting the Tx module to the 433MHz RF link is very simple ... There could be an issue with the library that you are using.

The transmitter module consists of three pins that is VCC, Data and GND. The VCC pin has a wide range input voltage from 3V to 12V. The transmitter consumes a minimum current of 9mA and can go as high ...

The circuit diagram of the RF-based 12-bit signal transmitter and receiver is shown in Fig. 1. It is built around 5V voltage regulator 7805 (IC1), Atmega8A MCU (IC2), 433MHz RF signal transmitter ...

433MHz radio frequency (RF) modules are widely used in different wireless projects and products. Normal range of most RF transmitter and receiver modules is below fifty metres. This RF Range Extender ...

Also go through below two articles to learn how to interface LCD and Keypad with PIC Microcontroller: Those are the transmitter and receiver modules we are using in the project. It is the cheapest ...