RADIO BRIDGE RBS301-TEMP-EXT-US Wireless External Probe Temp Sensor User Guide

RADIO BRIDGE RBS301-TEMP-EXT-US Wireless External Probe Temp

Sensor

QUICK START

To start using your sensor, simply go to: https://console.radiobridge.com From here you can register your device and immediately start receiving messages.
The sensor configuration, message monitoring, and setting up alerts is usually self-explanatory through the user interface. For further explanations of any sensor features, you may refer to this user guide

OVERVIEW

Sensor Overview

The wireless sensors designed and manufactured by Radio Bridge provide full sensor to cloud solutions for Internet of Things (IoT) applications. The external probe temperature sensor measures temperature using an external temperature probe. If the temperature rises above or falls below the configured thresholds, an alert is sent over the wireless network. Temperature is sampled every 15 seconds and averaged over 1 minute. Thus, the sensor is not appropriate for applications that need to detect rapid changes in temperature within periods of less than a minute. The temperature has been calibrated with controlled temperature chambers, and is accurate to +/- 1 degree C. Features include:

• Built-in radio that talks directly with LoRaWAN wireless networks
• Two types of tamper detection: enclosure tamper and wall mount tamper
  • Enclosure tamper detects if the packaging of the sensor itself is opened or broken Available on the RBSx01, RBSx05, and RBSx06 sensors.
  • Wall mount tamper detects if the sensor has been removed from the wall or mounting point. Available on the RBSx01 and RBSx05 sensors.
• 200,000+ transmissions on a single battery and a 5-10 year battery life depending on usage. See Battery section for more detail.
• Fully integrated internal antenna
• Over the air sensor configuration in the field
• Automatic low battery reporting and supervisory messages

Revision History

Document Conventions

Part Numbers

TECHNICAL SPECIFICATIONS

Absolute Maximum Ratings

BATTERY LIFE

This device uses a lithium non-rechargeable battery and is capable of 200,000+ total messages depending on the wireless standard and usage. For an accurate estimate of battery life, please refer to the “Sensor Battery Estimator.xlsx” spreadsheet on the Radio Bridge website. This spreadsheet combines usage information such as average number of messages per day and estimates the battery life for a particular device. Refer to the spreadsheet “Sensor Battery Estimator.xlsx” on the Radio Bridge website for specific battery life estimates. The power required for a message transmission is much greater than the “sleep current” (the power consumed when the device is inactive) for high power radio technologies such as LoRaWAN. This means that the battery life for most devices is primarily dependent on the number of transmissions per day. Different battery types will deplete over time with different voltage profiles. For instance, a lithium battery will maintain a relatively high voltage for the life of the battery and then experience a rapid drop near the end, whereas an alkaline battery will experience a more gradual reduction in voltage over time. Radio Bridge devices are shipped with lithium batteries, and these are recommended when the battery needs to be eventually replaced. Temperature also plays a role in battery life. The battery life estimates in the online spreadsheet assume room temperature, but temperatures close to the maximum and minimum ratings will have a negative impact on battery life. For example, battery voltage tends to be lower in cold temperatures and the internal circuitry needs a certain minimum voltage to operate properly before it will shut down. Thus, battery life will tend to be shorter when running the device in cold environments.  Battery voltage will be lower in cold temperatures and thus battery life will be reduced in cold environments.  The battery voltage is reported by the supervisory messages as well as a low battery indicator. See the section on Message Protocol for more detail.

TEST MESSAGES

The device can be triggered to send test messages by placing a magnet next to the side of the enclosure. The location of the magnet is indicated by the triangular notch on the side of RBSx01 and RBSx05 sensors. RBSx04 sensors do not have this capability. There is a small magnetic Hall effect sensor that will detect the presence of a magnet and send a message. This can be used for diagnostic purposes to ensure the sensor is within range and connected to the network.

MESSAGE PROTOCOL

This section defines the protocol and message definitions for the device. Radio Bridge provides a web-based console at console.radiobridge.com to configure and monitor devices. Usage of this console is highly recommended for most customers rather than implementing the protocols defined in this section. If the standard Radio Bridge console (console.radiobridge.com) is not used, refer to this section to decode the device data and configure the device through downlink messages.

Common Messages

There are common messages across all wireless devices that are defined in the document “Common Sensor Messages” which is available on the Radio Bridge website. Refer to the document “Common Sensor Messages” for definitions of all common messages. Common messages are not defined in this document.  Common messages include basic error messages, tamper, supervisory, and downlink ack. It is important to refer to that document prior to decoding the messages defined in this section.

Uplink Messages

The uplink message (sensor to web application) specific to the sensor is defined in following table. The common uplink messages are not included in this section (see common messages document).

The temperature event is defined in the following table.

The current temperature field in the temperature event uplink message is the current temperature in degrees Celsius. The temperature has been calibrated with controlled temperature chambers. The relative temperature measurement is the raw (analog to digital) measurement and ranges on a scale from 0-255. This value can be used with different calibration tables defined by the user. When a temperature is out of range, it will be reported as 0x7f (highest positive signed number) on the high end and 0x80 on the low end.

Downlink Messages

The downlink message (web application to sensor) specific to the sensor configuration is defined in following table. The common downlink messages are not included in this section (see common messages document).

The mode byte selects one of two modes: threshold based alerts or report-on- change alerts. The remainder of the payload (bytes 1-6) are determined by the mode selected and defined in the next two sections.

hreshold Mode

Threshold mode is set when byte 0 of the payload is set to 0x00. The remainder of the payload is defined in the following table.

The upper and lower temperature thresholds are signed values with units of one degree Celsius (range is -40 to 100 degrees C). Note that if the configuration settings exceed the maximum ratings on the sensor, the sensor may not report an event. The Restoral Margin is used for the upper and lower thresholds and requires the temperature value to cross back over the threshold a certain amount before a new event is reported. This prevents excessive event messages if the temperature is at or near the threshold. For example, consider an upper temp threshold set at 30 degrees Celsius and the restoral margin set at 5 degrees. If the temperature initially exceeds 30 degrees then an event is generated and a message is sent to the network. The temperature must now drop to 25 degrees and then exceed 30 degrees before another event is reported. The restoral margins are unsigned values with units of 1 degree Celsius (range is 1-15 degrees C). If a restoral margin is set to 0, it is disabled. Periodic reporting is described in the section Periodic Reports.

Report on Change Mode

Report on Change mode is set when byte 0 of the payload is set to 0x01. The remainder of the payload is defined in the following table.

If the temperature increase or decrease are non-zero, then the sensor will send an alert any time the temperature changes by the specified amount. For example, if the temperature increase and decrease are set to 5 degrees, then an alert is sent every time the temperature changes 5 degrees from the last report. The temperature increase and decrease are unsigned values with units in degrees C. Periodic reporting is described in the section Periodic Reports.

Periodic Reports

The temperature sensor can also send periodic updates, and this is defined in byte 1 of both modes. A setting of 0 will disable periodic reporting. The period is defined in 1 hour increments when the most significant bit is 0, and it is defined in 1 minute increments when the most significant bit is 1 as shown in the following table.

For example, to receive a report every 4 hours, byte 1 would be set to 0x04. To receive a periodic report every 15 minutes, byte 1 would be set to 0x8f. Note that prior to firmware version 1.3, only hourly reporting is available. The firmware version can be found in the reset message and is logged on the Radio Bridge console.  Periodic reporting is not recommended as it will increase data service fees and significantly reduce battery life. Wherever possible, use thresholds or report-on-change only.

MECHANICAL DRAWINGS

The mechanical drawings provided in this section are for the main body of the sensor. All dimensions are inches unless otherwise noted.

INDOOR RBSX01 SENSORS

ARMORED OUTDOOR/INDUSTRIAL RBSX06 SENSORS

REGULATORY AND COMPLIANCE

Federal Communications Commission (FCC)

Per FCC 15.19(a)(3) and (a)(4) This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Per FCC 15.21, Changes or modifications not expressly approved by Radio Bridge could void authority to operate the devices.

• Sigfox RBS101, RBS104, and RBS105 sensors FCC ID: 2APNUSFM10R2
• LoRaWAN RBS301, RBS304, and RBS305 sensors FCC ID: 2APNUCMABZ
• LoRaWAN RBS306 sensors: This device contains FCC IAU792U13A16858

Harmonized Commodity Description (HS Code)

The Harmonized Commodity Description and Coding System generally referred to as “Harmonized System” or simply “HS” is a multipurpose international product nomenclature developed by the World Customs Organization (WCO). HS Code: 8531.90.9001

Export Control Classification Number (ECCN)

ECCNs are five character alpha-numeric designations used on the Commerce Control List (CCL) to identify dual-use items for export control purposes. An ECCN categorizes items based on the nature of the product, i.e. type of commodity, software, or technology and its respective technical parameters. ECCN: 5a992.c

CUSTOMER SUPPORT

Radio Bridge offers free technical support at: https://support.radiobridge.com Radio Bridge also offers technical support plans and service packages to help our customers get the most out of their Radio Bridge products.

DISCLAIMERS

Information in this document is subject to change without notice and does not represent a commitment on the part of Radio Bridge. Radio Bridge provides this document “as is,” without warranty of any kind, expressed or implied, including, but not limited to, the implied warranties of fitness or merchantability for a particular purpose. Radio Bridge may make improvements and/or changes in this manual or in the product(s) and/or the software described in this manual at any time.

LEGAL NOTICES

See the Legal Notices section of the website for up to date information on Radio Bridge’s warranty, returns policy, privacy statement, terms of sale, and terms of service.

TRADEMARKS AND COPYRIGHT

Radio Bridge™, SubGig®, Armored Sensor™ and BridgeBee® are trademarks of Radio Bridge Inc in the United States. © 2019 Radio Bridge Inc. All rights reserved

References

• Radio Bridge Console
• Radio Bridge Console
• support.radiobridge.com

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