In this complete guide, I will explain how to use the YK04 radio frequency module with its remote control, ideal for home automation, robotics, and automation projects with Arduino.
Technical characteristics of the YK04 module
The system consists of two main elements:
- Transmitter: Remote control in keychain format with 4 channels and retractable antenna
- Receiver: Based on the PT2272 chip that activates 4 output pins according to the button pressed on the remote
The kit operates at 315Mhz with a range of up to 60 meters in open field. A significant advantage is the ability to configure the pairing address, allowing one receiver to work with multiple remotes.
Configuration and pairing of the system
Both the transmitter and receiver have configuration pins that must be soldered to establish the pairing code:
The pins must be soldered by establishing the same binary combination on both boards, connecting them to VCC (1 logical) or to GND (0 logical). In my setup, I used the code XXX01XXX as an example.
Operation and connection diagram
When pressing any key on the transmitter, the receiver delivers a signal of "1" logic in the corresponding output:
- Key B → Activates pin D0
- Key D → Activates pin D1
- Key A → Activates pin D2
- Key C → Activates pin D3
The VT pin is activated whenever any key on the transmitter is pressed, functioning as a transmission validation output.
Practical projects with the YK04 module
This RF module is versatile and can be implemented in various projects:
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