HWGATE915 Gateway Module User Manual Heat Watch

Heat Watch Gateway Module

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 Heat Watch

Wireless Gateway

 User's Manual

      Revision 3

   ©2018 Heat Watch

Installing the Gateway
Before installing the Gateway, note the serial number listed on the unit. This
will be needed later to verify the operation of the unit, and complete system

Insert the Gateway Module into the socket in the host hardware, making
certain to carefully align the pins. Gently press the Gateway into place, until
it is fully seated.

Carefully connect the RF cable to the miniature connector located on the
beveled end of the circuit board. The connector will snap into place with
minimal effort when properly aligned. Do not use force to mate the
connector. If it does not seat correctly upon the first attempt, remove it and
try again.

I/O Connections
The Gateway Module has 3 interface connectors to provide I/O with host
systems. These are:

     –    Header 1 – Command and Control
     –    Header 2 – Digital I/O
     –    Header 3 – Identification

Header 1 – Command and Control
Pin 1: 3.3 VDC Supply
Internal circuitry provides additional regulation and filtering for radio core.
Provide 3.3 VDC +/- 0.15V supply for proper operation.

Pin 2: RX
3.3V TTL/CMOS compatible UART interface receive line.

Pin 3: TX
3.3V TTL/CMOS compatible UART interface transmit line.

Pin 4: No Connect.

Pin 5: /RST
Active low reset for module. Pull to < 0.3 VDC for 100 ms to reset the

Pins 6-8: No Connect.

Pin 9: Digital Out
Reserved digital output for future expansion.

Pin 10: GND
Signal ground for module.

Header 2 – Digital I/O
Pins 1-5:
Digital I/O [1..5] for application specific digital interfaces.

Pin 6: Digital Input
Reserved digital input for future expansion.

Pins 7-10: No Connect.

Header 3 – Identification
Pin 1: GND
Signal ground for module.

Pin 2: No Connect.

Pin 3: Detect.
Internally connected to ground. Host system may use this pin to determine if
module is installed by externally connecting a 10 KW resistor to Vcc, and
monitoring the pin for a low state.

The Heat Watch Gateway module acts as a wireless to serial interface. It
receives packets transmitted from wireless sensors, and outputs data over the
serial port formatted in simple ASCII text. The Gateway module normally
operates in a low-power receive state, outputting a time synchronization
packet once per minute. The gateway also responds to range request and
pairing messages from wireless sensors. When the Gateway module is
operated as a wireless collector, only the RX and TX pins are used to transmit
data over the serial port.

The Heat Watch Gateway module can also function as a repeater by simply
retransmitting each data packet it receives. Time-to-live (TTL) packet
management prevents network congestion by limiting the number of times a
packet can be passed on the network.


This device complies with Part 15 of FCC Rules. Operation is subject to the
following 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.

Changes or modifications not expressly approved by Heat Watch could void
the user's authority to operate the equipment.

Notice of Modular Approval
All products utilizing this module are required to be furnished with a label on
the exterior of the enclosure stating:
                    “Contains FCC ID: 2AQX2-HWGATE915”
                     “Contains IC: 24232-HWGATE915”
In addition, such products are also required to provide regulatory compliance
statements on products and manuals, as required by FCC, IC, and/or any other
regulatory bodies.
This equipment is approved only for mobile applications. Antenna(s) used for
this transmitter must be installed to provide a separation distance of at least 20
cm from all persons and must not be co-located or operating in conjunction
with any other antenna or transmitter.
IC Notice:
This radio transmitter [IC: 24232-HWGATE915] has been approved by
Innovation, Science and Economic Development Canada to operate with the
antenna types listed below, with the maximum permissible gain indicated.
Antenna types not included in this list that have a gain greater than the
maximum gain indicated for any type listed are strictly prohibited for use with
this device.
Le présent émetteur radio [IC: 24232-HWGATE915] a été approuvé par
Innovation, Sciences et Développement économique Canada pour fonctionner
avec les types d'antenne énumérés ci-dessous et ayant un gain admissible
maximal. Les types d'antenne non inclus dans cette liste, et dont le gain est
supérieur au gain maximal indiqué pour tout type figurant sur la liste, sont
strictement interdits pour l'exploitation de l'émetteur.

This device contains licence-exempt transmitter(s)/receiver(s) that comply
with Innovation, Science and Economic Development Canada’s licence-
exempt RSS(s). Operation is subject to the following two conditions:
1. This device may not cause interference.
2. This device must accept any interference, including interference that may
cause undesired operation of the device.
L’émetteur/récepteur exempt de licence contenu dans le présent appareil est
conforme aux CNR d’Innovation, Sciences et Développement économique
Canada applicables aux appareils radio exempts de licence. L’exploitation est
autorisée aux deux conditions suivantes :
1. L’appareil ne doit pas produire de brouillage;
2. L’appareil doit accepter tout brouillage radioélectrique subi, même si le
brouillage est susceptible d’en compromettre le fonctionnement.

List of Approved Antennas:
                  Type             Gain
                    Dipole         +2.0 dBi
                    Whip           +2.2 dB

Document Created: 2019-04-03 15:27:22
Document Modified: 2019-04-03 15:27:22
Download: HWGATE915 Gateway Module User Manual  Heat Watch
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Document ID4054999
Application IDHEm8ETdzw/gr6dFJcPwpcA==
Document DescriptionUsers Manual
Short Term ConfidentialNo
Permanent ConfidentialNo
Document TypeUser Manual
Display FormatAdobe Acrobat PDF - pdf
Filesize17.84kB (222992 bits)
Date Submitted2018-10-31 00:00:00
Date Available2018-11-08 00:00:00
Creation Date2018-10-24 09:13:23
Producing SoftwareOpenOffice 4.1.3
Document Lastmod0000-00-00 00:00:00
Document TitleUser Manual
Document CreatorWriter
Document Author: Christopher Garman