8.61 €
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ESP8266 4-Channel WiFi Relay Module for Remote Control
Brand: satkit
8.61€
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The ESP8266 4-channel WiFi relay module is a device designed for remote control of electrical devices via WiFi connection, ideal for home automation projects and smart homes. This module incorporates an ESP-01 WiFi module and an 8-bit MCU, offering a stable and easy-to-configure solution for controlling up to four relays simultaneously.
Main features:
- Integrated high-quality MCU and ESP-01 WiFi module.
- Two operating modes: direct mode between phone and module, or via WiFi router.
- Additional function as a USB module when the ESP-01 is disconnected.
- Transmission distance in open environment up to 100 metres.
- Simple setup using Smartconfig technology for the WiFi account and password.
- 12 V relay with 10 A capacity for 250 V AC and 30 V DC, with current protection and high durability (up to 100,000 cycles).
- LED indicators for relay status and operating modes.
- Four isolators for high resistance to interference.
- UART interface for MCU debugging and programming.
- Compact size of 60 x 63 mm.
Technical specifications:
- Input voltage: 12V (IN+, IN-)
- UART serial ports: 12V, GND, TX, RX
- Buttons: S1 to change mode (default mode 1), S2 to reset
- Indicator LEDs: D1-D4 for relays, D7 for mode 1, D5 for mode 2, D6 for connection status
- Relay terminals: COM1-COM4 (common), NC1-NC4 (normally closed), NO1-NO4 (normally open)
Typical use and compatibility:
This module is perfect for remotely controlling lights, appliances and other electrical devices in smart home or IoT projects. Compatible with mobile applications that manage WiFi connection and TCP control, it can be easily integrated into Arduino-based systems and other microcontrollers that support UART communication.
Control commands:
- Open and close relays using specific hexadecimal commands for each channel.
Package contents:
- 1 x 12V ESP8266 4-channel WiFi relay module
With this ESP8266 4-channel WiFi relay module, you can implement efficient and reliable automation and remote control solutions, making it easier to manage electrical devices from your smartphone ნებისმიერ time and place within network range.
- Control up to 4 relays at the same time via WiFi with ESP8266 and 8-bit MCU.
- Two operating modes: direct connection or via WiFi router.
- 12V relay with 10A capacity for AC and DC loads.
- Simple setup with Smartconfig technology from a mobile app.
- LED indicators for relay status and operating modes.
- Transmission distance up to 100 metres in open environment.
- UART interface for MCU debugging and programming.
- High interference resistance with 4 built-in isolators.
- Compact 60 x 63 mm size, easy to integrate into projects.
- Compatible with mobile apps for IoT and home automation remote control.
Customer Questions & Answers
What types of loads and maximum power can the relays on this module handle?
Each relay supports up to 10A at 250V AC or 10A at 30V DC, equivalent to a recommended maximum load of 2500W in AC or 300W in DC per channel. It is essential not to exceed these limits to preserve service life and module safety.
What is included in the package and what are the physical dimensions of the module?
The package includes the board with four relays, the ESP-01 WiFi module and the connectors. The board measures 60 mm x 63 mm. Power cables and a protective case are not included. Approximate weight is 75 g.
Is it compatible with supply voltages other than 12V, and what happens if it is connected to 5V?
The module is designed for 12V input power on IN+/IN-. Powering it with 5V will prevent the relays from operating correctly and may stop the ESP-01 from working. This is not recommended to avoid damage or erratic operation.
What happens if there is a power cut or outage? Is the WiFi configuration lost?
The module uses Smartconfig technology to configure and store the WiFi information in memory. After a power cut, the configuration is retained, so there is no need to set it up again unless a full reset is carried out.
How does the isolation and interference protection compare with other similar relay modules?
This module includes four opto-isolators and protection diodes on each channel, reducing the risk of electromagnetic interference and current spikes. This gives it an advantage over low-cost modules without optocouplers, especially in industrial environments or with motors.
What supply voltage does the relay module require?
The module requires a 12V input voltage to operate.
How many relay channels does the module have?
The module has four relay channels for controlling different devices.
How is the relay module controlled?
It is controlled through a mobile app that connects to the module via WiFi within the local network.
Is it compatible with Arduino?
Yes, the module can be integrated with Arduino systems using the UART interface for programming and control.
What is the maximum WiFi transmission distance?
In an open environment, the maximum transmission distance is approximately 100 metres.
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