1. Folasaga
The Onset HOBO MX1101 is a wireless data logger designed to measure and transmit temperature and relative humidity data. Utilizing Bluetooth Low Energy (BLE) technology, it allows for convenient data access and configuration via mobile devices running the HOBOmobile app. This manual provides essential information for the proper setup, operation, and maintenance of your MX1101 data logger.
2. Fa'amatalaga Saogalemu
- Do not expose the data logger to extreme temperatures outside its specified operating range.
- Avoid exposing the device to water or other liquids beyond its IP50 rating, which indicates protection against dust but not water immersion.
- Use only the specified AAA 1.5 V alkaline batteries. Incorrect battery types may damage the device.
- Lafoa'i maa e tusa ai ma tulafono a le lotoifale.
- Aua le taumafai e tatala pe toe lipea e oe le masini. Va'ai i tagata faigaluega agavaa.
3. Oloa Ua Ovaview
The HOBO MX1101 is a compact, self-contained data logger featuring an integrated LCD screen for real-time data display and status indicators. It communicates wirelessly with your mobile device via Bluetooth for setup, data download, and management.

Ata 1: Luma view of the Onset HOBO MX1101 data logger, showing the LCD display and sensor area.
Vaega Autu:
- Feso'ota'iga uaealesi: Bluetooth Low Energy (BLE) for connection to mobile devices.
- Integrated LCD: Displays current temperature, relative humidity, logging status, battery level, and memory usage.
- HOBOmobile App: Free application for iOS and Android for logger configuration, data viewing, and management.
- Fa'aaliga Fa'alogo: Configurable audible or visual alarms for user-defined thresholds.
- Burst Logging: Allows for faster logging intervals when sensor readings exceed or fall below specified limits.
- Malosiaga Maualuluga: Stores up to 84,650 measurements.
4. Seti
4.1 Fa'apipi'i ma'a
- Locate the battery compartment on the back of the data logger.
- Tatala le ufiufi o vaega.
- Insert two AAA 1.5 V alkaline batteries, ensuring correct polarity.
- Tapunia ma le saogalemu le ufiufi o le potu.
4.2 HOBOmobile App Installation
Download the free HOBOmobile app from the Apple App Store (for iOS devices) or Google Play Store (for Android devices). Saili mo "HOBOmobile" by Onset.
4.3 Connecting to the Data Logger
- Ia mautinoa o loʻo faʻaogaina le Bluetooth i lau masini feaveaʻi.
- Open the HOBOmobile app.
- The app will scan for nearby HOBO MX data loggers. Select your MX1101 from the list of discovered devices.
- Follow the on-screen prompts in the app to establish a connection.
4.4 Fa'atulagaina o le Logger
Once connected, use the HOBOmobile app to configure the data logger settings, including:
- Ta'otoga Va'aiga: Set how frequently data is recorded (e.g., 1 minute, 5 minutes).
- Start/Stop Options: Define when logging begins and ends.
- Fa'ailoga Fa'ailoga: Set high and low limits for temperature and humidity to trigger alarms.
- Burst Logging Settings: Configure conditions for accelerated logging.
- Puipuiga: Optionally set a password for logger access.
5. Faʻagaioiga
5.1 Starting and Stopping Logging
Logging is initiated and stopped through the HOBOmobile app. Once configured and started, the logger will record data independently until stopped or its memory is full.
5.2 Viewing Data on the LCD
The built-in LCD screen provides immediate access to current readings and logger status. Information displayed typically includes:
- Tempera o le taimi nei
- Susū Fa'atatau i le taimi nei
- Logging Status (e.g., RUN, STOP)
- Fa'ailoga Tulaga Ma'a
- Memory Usage Indicator
Note: The LCD's visibility and response time may be affected by temperatures outside the 0 to 50°C (32 to 122°F) range.
5.3 Accessing Data via HOBOmobile App
Connect to the data logger using the HOBOmobile app to:
- View real-time data and historical graphs.
- Check the operational status and alarm notifications.
- Download logged data to your mobile device.
- Export data in various formats (e.g., CSV, Excel) for further analysis.
- Fa'asoa fa'amatalaga files via email or other applications.
6. Tausiga
6.1 Suiga maa
When the battery indicator on the LCD or in the HOBOmobile app shows low power, replace the two AAA 1.5 V alkaline batteries as described in Section 4.1. Typical battery life is 1 year with a 1-minute logging interval.
6.2 Fa'amamāina
Wipe the exterior of the data logger with a soft, damp cloth. Do not use abrasive cleaners or solvents. Ensure no moisture enters the sensor openings.
6.3 Manatuga Siosiomaga
The MX1101 has an IP50 environmental rating, meaning it is protected against dust ingress but not against water. Operate and store the device within its specified temperature and humidity ranges to ensure optimal performance and longevity.
7. Faʻafitauli
- Cannot connect to logger: Ensure Bluetooth is enabled on your mobile device and the logger is within the 100-foot wireless range. Check logger battery level.
- Logger not recording data: Verify that logging has been started via the HOBOmobile app. Check memory usage; if full, download data and clear memory.
- Faitauga le sa'o: Ensure the logger is placed in a location representative of the environment being monitored and not exposed to direct sunlight or drafts. Allow sufficient time for the logger to acclimate to new conditions.
- LCD blank or slow: This is normal if the ambient temperature is outside the 0 to 50°C (32 to 122°F) range. The logger continues to function, but the display may be affected.
- Puupuu le ola maa: Frequent connections, very short logging intervals, or continuous use of alarms can reduce battery life. Ensure fresh batteries are used.
For further assistance, refer to the HOBOmobile app's help section or the Onset webnofoaga.
8. Fa'amatalaga

Ata 2: Dimensions of the Onset HOBO MX1101 data logger, showing a width of 3.34 inches and height of 1.44 inches.
| Parameter | Taua |
|---|---|
| Va'aiga vevela | -20 i le 70°C (-4 i le 158°F) |
| Sa'o o le vevela | ±0.21°C from 0 to 50°C (±0.38°F from 32 to 122°F) |
| Va'aiga Susū Va'aiga | 1% i le 90% (e le fa'afefe) |
| Sa'o lelei ole susū | ±2% from 20% to 80% typical (max ±4.5% including hysteresis at 25°C); ±6% typical below 20% and above 80% |
| Manatu | 128 KB (84,650 measurements maximum) |
| Ola ma'a | 1 year typical (with 1-minute logging interval) |
| Ituaiga maa | Two AAA 1.5 V alkaline batteries (user replaceable) |
| LCD Visibility | 0 i le 50°C (32 i le 122°F) |
| Fua | 3.66 x 8.48 x 2.29 cm (1.44 x 3.34 x 0.9 inisi) |
| mamafa | 56 kalama (1.98 aunese) |
| Fa'ailoga Si'osi'omaga | IP50 |
| Tusipasi | CE-Approved |
| Atunuu na Afua mai ai | Amerika Tele |
9. Fa'amaonia ma Lagolago
The Onset HOBO MX1101 data logger comes with a manufacturer's warranty of 12 months from the date of purchase. For warranty claims, technical support, or service inquiries, please contact Onset customer support directly or visit their official website for detailed contact information and resources.