Mocreo ST5D-H2 Wi-Fi Freezer Thermometer Alarm User Manual
Mocreo ST5D-H2 Wi-Fi Freezer Thermometer Alarm

Introduction
Welcome to the user manual for the ST5 Sensor, a device designed for monitoring temperature in a variety of settings. With its waterproof external probe, the ST5 Sensor can detect and record ambient temperature in real-time. Features:
- Detectable Temperature Range: -40°F ~ 257°F.
- Three Alarm Methods: E-Mail Alert, App Push Notification, Hub Beeping.
- The ST5 Sensor is suitable for a range of environments including refrigerators/freezers, hot tubs, fish tanks, pet cages and more.
- For example, if you are monitoring the temperature of a freezer, place the ST5 Sensor's data logger outside the freezer and place the probe inside to ensure reliable readings.
What’s in the Box
- Hub (H2)
x1
- Micro USB Cable
x1
- Pin Clip
x1
- Data Logger
x2
- 4.9ft Probe Cable
x2
- Magic Sticker
x2
- User Manual
x1
Product Parameter
(1) ST5 Temperature Sensor
- Data Logger
- Sensor Probe
Model | ST5 |
Wireless Connection | Bluetooth |
Communication Range | 131ft/40m (No Obstacles) |
Dimensions | 2.4 x 2.4 x 0.7 inch (L x W x H) |
Weight (Including Probe) | 2.93 Ounces |
Battery (Rechargeable) | 3.7V 1800mAh Lithium Battery |
Size of Stainless Steel Shell | 6 mm in diameter |
Cable Length | 4.9ft |
Cable Cross Section | 4mm x 1.3mm |
Probe Measuring Rage | -40°F ~ 257°F (-40°C ~ 125°C) |
Temperature Accuracy | + 0.9°F (In the Range of 14°F to 185°F) |

Model | H2 |
Weight | 2.75 Ounces |
Dimensions | 3.46 x 1.48 x 2.05 inch (L x W x H) |
Input | AC 100 ~ 240V 50/60Hz |
Output | AC 100 ~ 240V 50/60Hz 10A |
Wi-Fi Frequency | 2.4 GHz |
Working Temperature | 14°F ~ S0°F (-10°C ~ 40°C) |
Working Humidity | 0 ~ 90%RH, No Condensation |
Indicator Light | Status of Hub |
Purple Breathing Light | Normal Working Condition |
Blue Breathing Light | The Hub Is in Setup Mode |
Red Breathing Light | Hub Is Not Connected to Wi-Fi |
Red Flashing Light | An Alarm Event Is Triggered |
- ST5 Temperature Sensor
- ST6 Temp & Humidity Sensor
- SW2 Water Leak Sensor
Power up the Hub
Please plug the Hub into an outlet to power up the Hub, and it is recommended that the Hub be installed in a high, unobstructed location if possible to ensure stable signal transmission between the Hub and the Sensor.
The Socket on the Hub can be used to power other devices, please be careful not to overload, the maximum output current supported by the socket is 10A.
Power Button Operation of the Hub
Short press 1s and then release.
- Control the switch of the socket, press to turn ON/OFF the power.
- When the Hub beeps because the Sensor triggers an alarm, a short press of the power button will temporarily turn off the Hub beep. Please note that in this case the function of controlling the socket switch will no longer be available.
- At this point the Hub enters Setup Mode, which is required when adding the Hub via the App.
- If the Hub is already connected to the network and working properly, performing this operation again will put the Hub into Setup mode and the Hub will be disconnected from the network.
- This operation will reset the Hub to restore the factory settings, the previous configuration will be cleared and the network will need to be configured from scratch.
- The H2 Hub only support BLE Sensor (Refer to Page 6), after Hub reset, there is no need to re-add BLE Sensors, when Hub is reconfigured and added, BLE Sensor will be back online automatically.
Setup
Download MOCREO App Search "MOCREO Sensor" on Google Play/App Store or scan the QR Code below to download the MOCREO Sensor App and register a MOCREO account on the App (MOCREO will send you a confirmation Email, click on the confirmation to complete the registration).
Google Play |
App Store |
MOCREO App |
![]() |
![]() |
![]() |






- Please make sure the Bluetooth of your mobile device (Smart phone/Tablet) is enabled during the whole setup process.
- The Bluetooth and GPS can be turned off after the Sensor setup is complete.\




Installation
- Please place the Hub at a relatively high position. The suggested distance between the Hub and Sensor is within 131ft (No obstacles, signal value stronger than 20% is ideal).
- Please make sure the Sensor probe was inserted firmly (Note: ST5 probe is waterproof but the Sensor Data Logger is not).
- Paste the Data Logger on the outside of refrigerator and place the probe inside.
Test the Effective Distance
- Place the paired ST5 Sensor in the location you want to monitor. The suggested distance between the Hub and Sensor is within 67ft-82ft (Household environment).
- Poke the Sensor pinhole for 1s and release.
- After 20~30 seconds, Tap the corresponding Sensor card on the App to reach the Sensor Settings Page and view the signal value, signal value stronger than 20% is ideal.
How the System Works
The ST5 Sensors use Bluetooth to communicate with the Hub. Therefore, the distance are limited to a Bluetooth range centered on the Hub (e.g., around the house).
This range is affected by distance and obstacles such as walls, windows, water, radio interference, etc. In short, longer distances and more obstacles mean weaker signals.
The H2 Hub uses a Wi-Fi (2.4GHz only) to transmit data from the MOCREO Sensors in range to the Internet. A cellular hotspot with Wi-Fi capability can also be used to provide Internet access. Then, the MOCREO App can be used to view your device data from anywhere in the world.
Battery
- The ST5 Sensor built- in 1800mAh rechargeable lithium battery.
- The battery can last up to 2 years before it needs to be charged again.
- Please charge the Sensor with a Micro USB Cable and a 5V 1A power adapter.
- The battery percentage can be checked on the App: Sensor Settings Page>Battery Level (Please do not check the battery level while the device is charging).
- When charging, the red indicator light will stay on and when the red indicator light goes off it means charging is complete.
- Low battery alert will be triggered when the battery is below 10% (Including Email alerts and APP notification).
Calibration
- When the Sensor was taken to or from the refrigerator / freezer, the ST5 Sensor will spend some time calibrating the reading, and it would take about 20 minutes for the ST5 to measure to proper ambient temperature.
- The ST5 has a built-in USA-made DS18B20 chip, which is a strictly calibrated industrial-grade chip and is more accurate than ordinary consumer chips.
- Calibration is usually not required, if you need information about the chip, please check the FAQ.
- Calibration is only used to correct for small variations of ±0.9°F (±0.5°C). If you find larger differences than this during calibration, which indicates a problem with the calibration process of your Sensor, please contact MOCREO Customer Service.
Configuration
【Name the Sensor】Tap Sensor Card > Button on the Upper Right > Alias Name > Save
【Name the Hub】Tap
Button on the Upper Left > Hubs > Click Button on the Hub Card > Name > Save
【Alert】Tap
Button on the Upper Left > Alerts > Set Alert Model > Save
【Export Data】Tap Sensor Card >
Button on the Upper Right > Export Historical Data > Choose Time Period > Export
Troubleshooting
Hub offline/unable to access the Internet. a. Please check whether the Hub is online. Open the App and click [Menu], then click [Hubs] to check the color of your Hub card.
- If the Hub card is gray, it means the Hub is offline.
- If the Hub card is green, it means the Hub is online.
- Please make sure your phone is within 15ft from the Sensor.
- Please check whether ST5 Sensor has entered setup mode (Poke Sensor for 1s, blue LED will flashing, which means the Sensor enters Setup mode).
- Please do not turn off the Bluetooth and network on your phone (Android needs to open the GPS and authorize the positioning permission).
- Click "Retry Button" on the page to re-add.
- If the Sensor still can't be added, please contact MOCREO Support for help.
- Install the Sensor as close to the Hub as possible. It's better if the Hub and the Sensor are in sight.
- Reduce the obstacles between the Hub and the Sensor.
- The Hub and Sensor should be placed far away from waste to avoid signal interference.
- Stay away from high power equipment, flammable and explosive materials.
- The Data Logger is non-waterproof, please avoid water submerging and extreme temperature.
- The working temperature range of the Sensor is from -40°F to +257°F (-40°C to +125°C). When exceeding this range, the data monitored might be inaccurate or the Sensor might be damaged.
- The battery is rechargeable. It can be charged with the micro USB cable equipped. But the battery is not removable.
Precautions for Use
To ensure the normal use of the product, please pay attention to the following situations:
- It is recommended to install the Hub in a high place.
- Do not expose the Device to high temperatures, humidity, or dusty environments.
- Do not place the Device near flammable materials.
- Do not put heavy objects on the Device or use it as a support.
- Children should not use the Device without adult supervision.
FCC Statement
FCC ID (Sensor): 2A36D-ST4 FCC ID (Hub): 2A36D-H1 This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
- This device may not cause harmful interference.
- This device must accept any interference received, including interference that may cause undesired operation.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
Warranty
MOCREO products enjoy a 12-Month limited warranty (Start from the date when customer receives the product), which applies only to hardware components of the device that are not subject to accident, misuse, neglect, fire, or other external causes, alterations, repair.
Disclaimer
The contents about how to use the product and the App guidance are only for reference, please refer to the actual situation for specific application. If there is something differs from the instruction during using the product, please contact MOCREO Support for updates. This product is for detecting and monitoring only, MOCREO is not responsible for any property damage or other consequences of the use of this product.
Customer Service
https://mocreo.com/doc/manual/support/faq.html
+1 (530) 988-8608
[email protected]
Search [ MOCREO Sensor ] on YouTube to watch the setup video tutorials.
Documents / Resources
![]() |
Mocreo ST5D-H2 Wi-Fi Freezer Thermometer Alarm [pdf] User Manual ST5D-H2 Wi-Fi Freezer Thermometer Alarm, ST5D-H2, Wi-Fi Freezer Thermometer Alarm, Freezer Thermometer Alarm, Thermometer Alarm, Alarm |
References
![]() |
[pdf]
Frequently Asked Questions Troubleshooting Guide Warranty
Ella MOCREO ST5 WiFi Freezer Thermometer Alarm Email Alert App Notification Data Logging Export No Subscription Fee Remote Temperature Sensor for Refrigerator Hot Tub 2 Pack ST5D H2 FAQ MOCREO 71AlkZOsp9L m media amazon images I ||| FAQs on ST5 WiFi Temp Monitoring System Q: Are there any subscription and other fees A: MOCREO App does not charge any subscription fee, monthly fee, or surcharge. Pay only for the product and get all Remotely monitor, view data graphs, export historical data, send alert notifications and more wit... lang:en score:29 filesize: 176.77 K page_count: 2 document date: 2023-11-09 |
![]() |
[pdf]
Borchure
药房监测白皮书 34 MOCREO ST5 WiFi Freezer Thermometer Alarm Email Alert App Notification Data Logging Export No Subscription Fee Remote Temperature Sensor for Refrigerator Hot Tub 2 Pack ST5D H2 Brochure MOCREO C1ufZRKWkkL m media amazon images I ||| IoT-based Environmental Monitoring System for Vaccine and Medication Storage Real-time monitoring for peace of mind mocreo.com 1 530 988-8608 b2b mocreo.com CONTENT 01 About MOCREO 02 The News About the Vaccine Spoilage 02 The Optimal Temperature Ranges for Vaccine 03 The Importance of Medicat... lang:en score:28 filesize: 4.47 M page_count: 9 document date: 2023-04-27 |
tags: Alarm, Freezer Thermometer Alarm, Mocreo, ST5D-H2, ST5D-H2 Wi-Fi Freezer Thermometer Alarm, Thermometer Alarm, Wi-Fi Freezer Thermometer Alarm,