Remote monitoring
IoT remote monitoring with SIM-card dataloggers
Monitor remote sites with no cabling, no broadband and no mains power. A SIM-card datalogger such as the yDoc ML-525 reads your sensors on site and sends the data over the mobile network to Sensor-Online, using an HTTPS API endpoint or MQTT.
When a SIM-card datalogger is the right tool
Not every site suits a wireless sensor network. When your instruments are wired, spread out, or placed where there is no cabling, Wi-Fi or LoRaWAN coverage, a datalogger gathers them at one point and reports over the mobile network.
The yDoc ML-525 is a multipurpose IoT datalogger that connects a wide range of sensors and sends the data straight to Sensor-Online. It is a good fit for remote monitoring and environmental instrumentation, such as water, weather, air, soil and tank levels.
How it works
From the sensor in the field to a dashboard.
Connect
Wire your sensors to the logger: analogue, digital, pulse, SDI-12, RS-232/485 or Modbus RTU.
Log
The logger samples the sensors on your schedule and stores the readings.
Send
The readings go over the mobile network with a SIM card, as HTTPS or MQTT.
See
Dashboards, maps, alarms and reports in Sensor-Online.
Two ways to deliver data
Choose the one that fits your logger and your network.
HTTPS API endpoint
The logger posts its readings to an endpoint in the Sensor-Online API. Simple to set up, and it works through most mobile networks.
MQTT
The logger publishes its readings over MQTT, a light protocol that suits low bandwidth and battery-powered devices.
Beyond the mobile network
Where there is no mobile coverage, the yDoc ML-525 also supports Iridium satellite, LoRaWAN and Ethernet.
What you can monitor remotely
Remote monitoring and environmental instrumentation.
Water and hydrology
Level, pressure, quality and flow in groundwater, surface water and stormwater.
See water quality monitoring →Weather and climate
Wind, rain, temperature and humidity from weather stations.
Air quality
CO₂, particulate matter and indoor or outdoor climate.
Soil and agriculture
Soil moisture, temperature and conductivity in fields and growing media.
See smart agriculture →Tanks and levels
Radar and pressure level sensors for tanks, wells and basins.
Industry and energy
Process signals such as 4–20 mA, and Modbus RTU meters and instruments.
PLC and datalogger integration →Why a SIM-card datalogger
Built for sites where nothing else reaches.
No wiring to the site
Mobile data replaces cables, Wi-Fi and a local network.
Runs off-grid
Lithium battery, 7–30 V DC or a built-in MPPT solar input, with up to 10 years on battery in low-duty applications.
Built for the field
IP67 housing rated from –40 °C to +70 °C.
One logger, many sensors
Analogue, digital, pulse, SDI-12, RS-232/485 and Modbus RTU inputs.
Open delivery
Standard HTTPS or MQTT into Sensor-Online, so you are never locked in.
Alarms where it matters
Set thresholds in Sensor-Online and get alerts by e-mail, SMS, Telegram, webhook or MQTT.
Agent for yDoc dataloggers
Nodeledge AB is the agent for yDoc dataloggers (ydoc.biz) and the developer of Sensor-Online, so the logger and the platform work together from the first day. We help you choose logger and sensors, and set up the connection to Sensor-Online.
Related solutions
yDoc ML-525 datalogger
Read more →IoT water quality and environmental monitoring
Read more →Real-time environmental monitoring
Read more →Frequently asked questions
What is a SIM-card datalogger?
A battery-powered or solar-powered unit that reads wired sensors on site, stores the readings and sends them over the mobile network using a SIM card.
How does the logger send data to Sensor-Online?
Either as HTTPS to an endpoint in the Sensor-Online API, or over MQTT. Both work over a normal mobile data connection.
Which sensors can I connect to the yDoc ML-525?
Sensors with analogue (4–20 mA, 0–10 V, mV), digital, pulse, SDI-12, RS-232, RS-485 or Modbus RTU interfaces, including many devices from our catalogue.
Can it run without mains power?
Yes. It runs on a lithium battery, a 7–30 V DC supply or a built-in MPPT solar input, with up to 10 years on battery in low-duty applications.
What if there is no mobile coverage?
The yDoc ML-525 also supports Iridium satellite, LoRaWAN and Ethernet. Contact us and we will suggest the right link for your site.
Planning remote monitoring? Talk to an engineer.
Tell us about your sites and sensors, and we will suggest a logger, a network and a first step.