Your Swiss Army Knife for IoT & Automation
The tinycontrol LK4 is no ordinary Network device – it is the command center for your automation projects. As a universal IoT Controller, it collects data from various sensors, processes it according to your rules, and then switches actuators such as Relays or lights. Whether you want to regulate the temperature in your greenhouse, monitor the fill level of a tank, or implement access control: The LK4 offers you the necessary hardware and software in a compact, professional housing for DIN rail mounting, part of effective Mounting Systems.
Limitless Connectivity: LAN, WiFi, PoE, and Open Protocols
Flexibility is key. The LK4 can be integrated into your Network via classic Ethernet Cables or the integrated WiFi. The absolute highlight is the Power Supply: Use a standard power adapter (8-58V DC) or power the controller directly via the Network cable using Power over Ethernet (PoE). This saves installation effort and often makes separate PoE Injectors / Power Supplies unnecessary. Thanks to the support of open standards such as MQTT, Modbus TCP/RTU, and SNMP, the LK4 integrates effortlessly into existing systems like Home Assistant, Loxone, or industrial SCADA applications.
Sensors, Relays, Logic: Your Custom Control Center
The heart of the LK4 is its impressive variety of inputs and outputs. Connect up to eight DS18B20 temperature sensors to the 1-Wire bus, evaluate I2C sensors for humidity and pressure, or read Modbus energy meters via the RS485 interface. Four digital and three analog inputs await signals from buttons, motion detectors, or level sensors. With the powerful relay, you can switch consumers up to 255V/10A, while additional transistor and open-collector outputs for smaller loads are available. The optional 4G variant, with suitable M2M / IoT Antennas - 4G, 5G, WiFi, even enables use in locations without fixed Network infrastructure.
Intuitive Control Without Programming Knowledge
Complex technology doesn't have to be complicated. You configure the tinycontrol LK4 entirely via a clean and modern web interface in your browser. Here, in the 'Events' section, you can easily define powerful automation rules. Example: 'IF the temperature from sensor 1 rises above 25°C AND it is after 6:00 PM, THEN switch on Relay 1 and send an email.' With the integrated scheduler, up to 50 time-controlled actions can be planned, and the IP-Watchdog ensures the reliability of your Network by monitoring up to five other devices and restarting them if necessary.
Strengths & Notes at a Glance
- Pro: Extreme interface variety (LAN, WiFi, Relays, Digital/Analog I/O, 1-Wire, I2C, RS485) in one device, enhancing your Network capabilities.
- Pro: Powerful and autonomous software logic with event engine and scheduler, configurable via web GUI.
- Pro: Professional Power Supply with wide voltage range (8-58V DC) and dual PoE capability (802.3af & passive), reducing the need for separate PoE Injectors / Power Supplies.
- Pro: Open communication protocols (MQTT, Modbus, SNMP, HTTP-API) for maximum integration capability.
- Note: The enormous range of functions can initially be a challenge for beginners without basic technical understanding.
- Note: The full potential is only unleashed by connecting external sensors and actuators, which must be purchased separately.
Specifications & Features
| Manufacturer: | tinycontrol |
| Model: | LK4 (LAN Controller v4) |
| HAN/MPN: | 06202 |
| EAN: | 5906111106202 |
| Product Classification: | Universal IoT Controller |
| Dimensions (W x L x H): | 106 x 79 x 38 mm |
| Weight: | 130 g (Complete Set) |
| Mounting: | DIN Rail (35mm), compatible with various Mounting Systems |
| Enclosure Protection Class: | IP20 |
| Operating Temperature: | -20 °C to +85 °C |
| Supply Voltage: | 8 – 58 V DC |
| Power Consumption: | approx. 0.5 W (without activated Relays) |
| PoE Supply: | Yes, 802.3af (Mode A) and passive (via jumper) |
| Ethernet: | 1x RJ45, 10/100 Mbit/s |
| WiFi: | 802.11n (2.4 GHz), integrated Antenna |
| WiFi Modes: | Station, Access Point |
| 4G Modem: | Available as an optional variant (LK4 4G) |
| Supported Protocols: | HTTP (Client/Server), MQTT (Client), SNMP (v3), Modbus RTU, Modbus TCP (Server), UDP, SMTP, NTP |
| Security: | TLS for HTTP/SMTP/MQTT, Basic/Digest Authentication |
| Relay Outputs: | 1x Changeover (NO, C, NC), switchable up to 255 V AC / 10 A |
| Transistor Outputs: | 1x (Output voltage = VCC), up to 0.6 A |
| Open-Collector Outputs: | 4x |
| PWM Outputs: | 3x (3.3 V), frequency 1 Hz - 1 MHz |
| Digital Inputs: | 4x (Status Sensor, Button, Pulse Counter) |
| Analog Inputs: | 3x (switchable measurement ranges) |
| Measurement Range INPA1/2: | 0.1 - 3.3 V or 0 - 58 V |
| Measurement Range INPA3: | 0.1 - 5 V or 0 - 58 V |
| Integrated Voltage Measurement: | Yes, measurement of supply voltage up to 58 V |
| 1-Wire Sensor Bus: | Yes, for up to 8x DS18B20 Temperature Sensors |
| I2C Sensor Bus: | Yes, for various sensors (Temperature, Humidity, Pressure etc.) |
| RS485 Sensor Bus: | Yes, for Modbus RTU devices |
| Serial Interface: | UART |
| On-Board Sensors: | Temperature and Humidity |
| Management: | Integrated, responsive Webserver |
| Scheduler: | Yes, for up to 50 programmable events |
| Events Function: | Yes, 'If-Then' logic with 2 conditions and logical operators |
| IP-Watchdog: | Yes, for monitoring up to 5 Network devices |
| Firmware Update: | Directly via the Web Interface |
| Cloud Connectivity: | Yes, via manufacturer's own MQTT Service |
Scope of Delivery
| 1 x tinycontrol LK4 LAN Controller v4 |
Frequently Asked Questions (FAQ)
Can the tinycontrol LK4 be directly connected to the 230V power grid?
No, the LK4 requires a direct current (DC) Power Supply between 8 and 58 volts. Alternatively, it can be powered via Power over Ethernet (PoE 802.3af or passive), which can eliminate the need for a separate PoE Injectors / Power Supplies at the installation site.
Which sensors can I connect directly to the LK4?
You can connect a variety of sensors: up to eight DS18B20 temperature sensors on the 1-Wire bus, various I2C sensors for temperature, humidity, pressure, and air quality, as well as any analog sensors to the analog inputs. Modbus-RTU-enabled devices can also be read via the RS485 bus.
Do I need programming skills to use the LK4?
No, no programming skills are required for basic configuration. All settings, including the creation of automation rules ("Events") and schedules, are done via a graphical web interface in the browser.
Can the LK4 also work without an internet connection?
Yes, the controller can operate completely autonomously in a local Network (LAN/WLAN). All control logics are stored and executed directly on the device. An internet connection is only required for remote access, NTP time synchronization, or the use of cloud services, which can be managed by WiFi Routers or WiFi Access Points.
Is it possible to detect a power outage with the LK4?
Yes, indirectly via the integrated measurement of the supply voltage. You can create a rule that sends a notification when the voltage returns. For a notification during the outage, the optional 4G variant with a buffer battery (UPS) would be required.
Can I visualize the data collected by the LK4 in my own software?
Yes, absolutely. You can query the data via various protocols such as HTTP-API, Modbus-TCP, or MQTT and thus integrate it into your own systems like Home Assistant or SCADA solutions.
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Postal code, City: 26-600 , Radom
Country: Polen
E-Mail: info@tinycontrol.pl
Homepage: https://www.tinycontrol.pl