MikroTik KNOT

The newest addition to the MikroTik IoT product family, KNOT with its manufacture part number RB924i-2nD-BT5&BG77, is a truly universal device with exceptional connectivity options and protocol support. This versatile and robust IoT gateway is designed for seamless integration and high performance in various network environments, making it an ideal solution for IoT applications, smart cities, and industrial automation. Combining multiple connectivity options, the KNOT uses Narrow Band and CAT-M technology, supported by countless mobile operators globally due to its low-cost, low-bandwidth cellular connection. The KNOT meets various international standards, including CE, FCC, IC, EAC, and ROHS certifications. Rated IP20, it offers basic protection against dust and physical contact.

KNOT is a great tool for various outdoor cabinet IoT applications, featuring a DIN rail mount for easy integration into diverse setups. It is suitable for agriculture, asset tracking, cold chain monitoring, industrial manufacturing, and more. The device's robust design and extensive connectivity options make it perfect for the most remote or challenging areas, providing flexible, low-cost connectivity.

Built on the reliable MIPSBE architecture, the KNOT features a QCA9531 CPU with a single core operating at a nominal frequency of 650 MHz. This efficient processor ensures smooth data processing and reliable performance. The device uses the QCA9531 switch chip, which supports efficient data handling across its networking interfaces. Equipped with 64 MB of RAM and 128 MB of NAND storage, the KNOT offers ample memory and storage capacity for running RouterOS and storing necessary configurations and data. The compact design measures 122 x 87 x 26 mm, making it easy to install in various environments.

The KNOT features a 2.4 GHz wireless interface with a maximum data rate of 300 Mbit/s, utilizing 802.11b/g/n standards and 2 chains. The QCA9531 wireless chip ensures robust Wi-Fi 4 connectivity with an antenna gain of 1.5 dBi. It includes two 10/100 Ethernet ports for wired network connections. The device supports a Nano SIM for modem connectivity and features a microUSB type AB port with a maximum current of 1A.

KNOT is designed for extensive IoT functionality, including monitoring onboard GPIOs, converting Modbus protocol to TCP, and forwarding Bluetooth packets to a TCP/IP network via HTTPS and MQTT. It can serve as a TCP bridge for wired Modbus sensors, sending readings to a Modbus server and providing wireless connectivity to wired sensors like electricity meters and relays. KNOT can be used as a backup connection for Ethernet or as a management channel for your network, offering a cost-effective alternative to LTE plans.

How would all this work in real life? Well, let’s imagine a hospital. Lots of expensive assets moving across huge buildings. Tools, equipment, meds, you name it. Everything gets moved around all the time. Usually, hospitals have to spend a lot of resources on inventory checking. Let’s fix that. Place low-cost Bluetooth tags on all the important items. Add a KNOT device in every storage room. Now the hospital management always knows if the equipment is returned to its place. Why stop there? You can add temperature sensors to medical supplies and use the KNOT to keep track. The possibilities are endless.

With Bluetooth version 5.2, the KNOT supports asset tracking and telemetry based on Bluetooth advertisement packets. It is compatible with any BLE tag that sends advertisement data, including iBeacon, Eddystone, or any other format. Powerful filters allow for forwarding only relevant packets while ignoring others, enhancing its efficiency and functionality.

The KNOT supports three types of DC inputs: MicroUSB, DC jack, and PoE-IN, with input voltages ranging from 12-57 V. It can also be powered via 802.3af/at PoE in, with input voltage options of 18-57 V. The device has a maximum power consumption of 18 W, and 5 W without attachments, making it energy-efficient for various applications. It includes a PoE-out port on Ether2, supporting passive PoE up to 57V, with a total output power of 12 W.

The KNOT runs on RouterOS, providing extensive networking features and capabilities with a RouterOS license level 4. It is built to withstand extreme conditions, with an operating temperature range from -40°C to 70°C, ensuring reliable performance in harsh environments. With a Mean Time Between Failures (MTBF) of approximately 100,000 hours at 25°C, the KNOT ensures long-term reliability.