MirkoTik RB924i-2nD-BT5&BG77 KNOT IoT Gateway for Versatile and Cost-Effective Setups User Guide
- June 7, 2024
- MirkoTik
Table of Contents
MirkoTik RB924i-2nD-BT5 &BG77 KNOT IoT Gateway for Versatile and Cost-
Effective Setups User Guide
The newest addition to the MikroTik IoT product family – KNOT – is a truly universal device with exceptional connectivity options and protocol support. It is an IoT Gateway that uses Narrow Band and CAT-M technology. Because of the low cost, low bandwidth cellular connection, it is supported by countless mobile operators around the globe.
It doesn’t matter whether you have devices that are no longer in production, devices that came out this year, or even some custom solutions by your technician – the KNOT can help you integrate or “tie” them all together in a single system.
KNOT can monitor onboard GPIOs, convert Modbus protocol to TCP, and even forward Bluetooth packets to TCP/IP network via HTTPS and MQTT. You can use the KNOT as a TCP bridge from wired Modbus sensors to send readings to a Modbus server. Yes, the KNOT brings wireless connectivity to wired sensors and actuators, such as electricity meters and relays.
CAT-M brings better connectivity to host – reach even previously unavailable places!
It could be used as a backup connection for the Ethernet or as a management channel for your network. NB/CAT-M monthly plan is much cheaper than LTE. Why spend extra money on bandwidth you don’t need? For example, you can manage a KNOT-powered vending machine with temperature and moisture sensors with only a few megabytes per day!
KNOT features so many protocol support and connectivity options:
2.4 GHz wireless, Bluetooth, 2x 100 Mbps Ethernet ports with PoE-in and PoE-
out, MicroUSB. Maximum convenience at the lowest cost!
With the Bluetooth interface, you can use the KNOT for asset tracking and telemetry based on Bluetooth advertisement packets. KNOT supports any BLE tag that sends advertisement data. iBeacon, Eddystone or any other format. It has powerful filters for forwarding only relevant packets and ignoring others.
KNOT is a great tool for most outdoor cabinet IoT applications as well. It comes with a DIN rail mount that allows easy integration with all kinds of setups: from agriculture and asset tracking to cold chain monitoring, industrial manufacturing, and so on.
Bring flexible low-cost connectivity to the most remote or tricky areas
with the MikroTik KNOT!
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.
Narrow Band and CAT-M technology is supported by many operators around the world!
Specifications
| Product code | RB924i-2nD-BT5&BG77 |
|---|---|
| CPU | OCA9531650 MHz |
| Number of 100 Mbps Ethernet ports | 2 |
| Number of 100 Mbps Ethernet ports with PoE-out | 1 |
| Size of RAM | 64 MB |
| Storage | 16 MB flash |
| Wireless | 2.4 GHz 80211 b/g/n dual-chain |
| Antenna gain | 1.5 dBi |
| Bluetooth antenna gain | 2 dBi |
| Antenna beam width | 360° |
| Bluetooth | Version 5.2 |
| Dimensions | 122 x 87 x 26 mm |
| Operating system | RouterOS, License level 4 |
| USB port | 1 microUSB port type AB |
| SIM slots | 1 Nano SIM |
| Built-in GPS | Yes (GPS, GLONASS, BeiDou, Galileo) |
| Operating temperature | -40°C to +70°C |
Powering
| PoE-in input Voltage | 12-57 V |
|---|---|
| Number of DC inputs | 3 (PoE-in, DC jack, MicroUSB) |
| Supported input Voltage | 12-57 V (PoE-in. DC jack), 5 V (MicroUSB) |
| PoE-out | 802.3af/at |
| PoE-out ports | 1 (Ether2) |
| Power adapter nominal voltage | 24 V |
| Power adapter nominal current | 1.2 A |
| Max power consumption (without attachments) | 5 W |
| Max power consumption | 18 W |
Certification & Approvals
- Certification: Bluetooth, CE, FCC, IC
Wireless specifications
| Rate (2.4 GHz) | Tx (dBm) | Rx (dBm) |
|---|---|---|
| 1MBit/s | 22 | -96 |
| 11MBit/s | 22 | -89 |
| 6MBit/s | 20 | -93 |
| 54MBit/s | 18 | -74 |
| MCS0 | 20 | -93 |
| MCS7 | 16 | -71 |
Bluetooth Wireless Specification
1M| 4| -93
Supported bands
Module BG77
Cat M1: LTE FDD| B1/B2/B3/B4/B5/B8/B12/B13/B18/B19/B20/B25/B26/B27/B28/B66/B85
Cat NB2: LTE FDD| B1/B2/B3/B4/B5/B8/B12/B13/B18/B19/B20/B25/B28/B66/B71/B85
Region| Global
GNSS (Optional)| GPS/GLONASS/BeiDou/Galileo/QZSS
Included parts
-
24 V 1.2 A power adapter
-
Wall mount set
-
DIN rail mount set
-
**USB A Female to Micro B cable
**
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>