Climate sensor
Temperature and humidity of a room.
Electronics & sensor networks
Sensors that speak up on their own.
Mizelum is a family of small wireless sensors with its own radio protocol. Each one sleeps, wakes, reports and sleeps again. A hub on your network hears them all, and one program shows every reading in a terminal or a browser.
- 28kinds of sensor
- 10device types
- 32devices per hub
Climate sensor
51330003Live
Temperature21.6°C51330003-42
Humidity48.2%51330003-43
Last heard03severy 10 s
Supply2.99 V
Link100 %
Example readings · not a live sensor
How it works
From a sensor to your screen in three steps
Sensors push; nothing polls them. That is what lets a sensor keep its radio off almost all the time and run from a battery.
01 · Sensor
Wakes, measures, sends
A small board with a microcontroller and a radio. It sleeps with the radio off, wakes on its own schedule, sends one report and sleeps again.
CH32V003 · nRF24L01+02 · Hub
Always listening
Hears every sensor in range, keeps the latest report of each, and answers questions about them on your network.
CH32V203 · W550003 · Mizelum
Shows and remembers
One program on a PC. It asks the hubs, keeps the history, and shows every sensor in a terminal or in a browser.
TUI · dashboard · APISensors push
A radio that listens draws about 13 mA, which empties two AA cells in about a week. So a sensor never listens for a question. It sends when it has something, waits for the hub's acknowledgement, and sleeps.
A device is not a sensor
One device can measure several things. Each reading is a sensor of its own, with its own name, gauge and graph: 51330003-42 is the temperature of device 51330003.
Nothing hidden
The hub speaks plain lines of text. Connect with nc hub 7737, type LIST, and read what every sensor last said.
The sensors
One protocol, many devices
The device types the protocol names today. One has firmware; the rest exist in the simulator, where the software already shows them.
21.6°CTemperature
- 2 sensors
21.6°CTemperature
Weather station
The weather outside: air, wind and rain.
- 6 sensors
612ppmCO2
Air monitor
What is in the air indoors, and how loud it is.
- 7 sensors
ONSwitch
Energy meter
What a circuit draws, and whether it is switched on.
- 5 sensors
1260mmWater level
Tank monitor
How full a tank is, and whether it is leaking.
- 4 sensors
CLEARMotion
Room sensor
Motion, light, a door or window, and smoke.
- 4 sensors
What they measure
28 kinds of sensor
Every kind has its tag in the protocol and its icon on screen.
- Temperature
- Relative humidity
- Air pressure
- CO2
- Fine dust (PM2.5)
- Particulate matter
- Air quality (VOC index)
- Sound level
- Light
- UV index
- Rain fallen
- Wind speed
- Wind direction
- Soil moisture
- Water level
- Volume
- Water leak
- Weight
- Distance
- Power
- Current
- Voltage
- Energy used
- Switch
- Motion
- Contact
- Smoke
- Counter
Where it stands
Early, and honest about it
Mizelum is being built protocol first, then software, then hardware.
Built
- The radio protocol and the hub protocol, written down
- Hub firmware, and firmware for the first test sensor
- Mizelum: the terminal interface, the service with its history and HTTP API
- The web dashboard, with themes and a choice of gauges
- A simulated hub with one of every device, to try it all without hardware
Still ahead
- Seeing a sensor report through a real hub: so far the hub firmware has only been flashed
- Encryption and pairing: frames are open and every sensor shares one address
- Commands from hub to sensor, and finding a hub on the network
- Boards, enclosures and radio approval