Bradford White BWCADAPTER User manual

User Manual of BWCADAPTER
BWCADAPTER
Version: 1.0
Date: 23-11-2020
Bradford W ite Corporation
200 Lafayette St.
Middleville, MI 49333
United States
www.Bradford W ite.com
P one: 215-641-2115
Email: info@Bradford W ite.com
Confidentiality Notice
Copyrig t © 2017 Bradford W ite – All rig ts reserved.
T is document is aut ored by Bradford W ite and is Bradford W ite’s intellectual property, including t e copyrig ts in all countries in t e world.
T is document is provided under a license to use only wit all ot er rig ts, including owners ip rig ts, being retained by Bradford W ite. T is
file may not be distributed, copied, or reproduced in any manner, electronic or ot erwise, wit out t e express written consent of Bradford
W ite.

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TABLE OF CONTENTS
1 INTRODUCTION........................................................................................................................................................... 6
1.1 PURPOSE..................................................................................................................................................................6
1.2 SCOPE..................................................................................................................................................................... 6
1.3 ACRONYMS & ABBREVIATIONS.................................................................................................................................... 6
1.4 REFERENCES............................................................................................................................................................. 6
2 PRODUCT OVERVIEW..................................................................................................................................................
2.1 SYSTEM BLOCK DIAGRAM......................................................................................................................................... 10
2.2 FEATURES AND FUNCTIONALITY..................................................................................................................................11
3 MAJOR COMPONENTS ON BWCADAPTER................................................................................................................12
3.1 WIRELESS CONNECTIVITY.......................................................................................................................................... 12
3.2 WI-FI+ BLUETOOTH COMBO MODULE....................................................................................................................... 12
3.3 POWER SUPPLY....................................................................................................................................................... 12
3.4 ANTENNA DETAILS................................................................................................................................................... 13
4 PERIPHERAL INTERFACES.......................................................................................................................................... 14
4.1 ETHERNET.............................................................................................................................................................. 14
4.2 SERIAL PORTS......................................................................................................................................................... 14
4.3 DEBUG PORT.......................................................................................................................................................... 14
4.4 SWITCH..................................................................................................................................................................16
4.5 LED'S.................................................................................................................................................................... 16
5 ELECTRICAL THERMAL & ANTENNA RANGE CHARACTERISTICS.............................................................................. 18
5.1 RECOMMENDED OPERATING CONDITIONS................................................................................................................... 18
6 MECHANICAL DIMENSIONS.......................................................................................................................................19
APPLICATION NOTES................................................................................................................................................. 20
SAFETY PRECAUTIONS.....................................................................................................................................................20
DESIGN ENGINEERING NOTES.......................................................................................................................................... 20
STORAGE CONDITIONS....................................................................................................................................................21
8 COMPLIANCE STATEMENT........................................................................................................................................ 22
8.1 FEDERAL COMMUNICATIONS COMMISSION (FCC).........................................................................................................22
8.2 INDUSTRY CANADA (IC) COMPLIANCE STATEMENT........................................................................................................ 22

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LIST OF FIGURES
FIGURE 1 BWCADAPTER................................................................................................................................................... 7
FIGURE 2 BWCADAPTER PCBA..........................................................................................................................................7
FIGURE 3 SYSTEM BLOCK DIAGRAM OF BWCADAPTER......................................................................................................... 10
FIGURE 4 INTERFACES ON BWCADAPTER........................................................................................................................... 14
FIGURE 5 DEBUG PORT...................................................................................................................................................... 15
FIGURE 6 USER CONFIGURABLE SWITCH............................................................................................................................... 16
FIGURE 7 LED'S ON BWCADAPTER................................................................................................................................... 16
FIGURE 8 BWCADAPTER DIMENSIONS............................................................................................................................... 19
LIST OF TABLES
TABLE 1 : REVISION HISTORY................................................................................................................................................. 5
TABLE 2 : ACRONYMS & ABBREVIATIONS.................................................................................................................................6
TABLE 3 : REFERENCES..........................................................................................................................................................6
TABLE 4 FEATURES AND FUNCTIONS OF BWCADAPTER........................................................................................................ 11
TABLE 5 APPLICATIONS PROCESSOR DETAILS..........................................................................................................................12
TABLE 6 ANTENNA DETAILS................................................................................................................................................ 13
TABLE 7 LED'S................................................................................................................................................................. 17
TABLE 8 RECOMMENDED OPERATING CONDITIONS................................................................................................................. 18

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COPYRIGHT INFORMATION
T e information contained in t is document is t e proprietary information of Bradford W ite USA. T e
contents are confidential and any disclosure to persons ot er t an t e officers, employees, agents or
subcontractors of t e owner or licensee of t is document, wit out t e prior written consent of Bradford
W ite, is strictly pro ibited.
Furt er, no portion of t is document may be reproduced, stored in a retrieval system, or transmitted in
any form or by any means, electronic or mec anical, including p otocopying and recording, wit out t e
prior written consent of Bradford W ite, t e copyrig t older.
Bradford W ite publis es t is document wit out making any warranty as to t e content contained
erein. Furt er Bradford W ite reserves t e rig t to make modifications, additions, and deletions to t is
document due to typograp ical errors, inaccurate information, or improvements to products mentioned
in t e document at any time and wit out notice. Suc c anges will, nevert eless, be incorporated into
new editions of t is document.

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Revision History
Date
Version
Details
of
change
Author
Reviewers
23-Nov-20 1.0 Initial draft Bradford W ite Julian
Table 1: Revision History

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1 INTRODUCTION
1.1 Purpose
T is document describes t e Bradford W ite’ BWCADAPTER commercial and residential IoT Gateway.
Targeted for controlling water eaters and boilers placed in Buildings and Industries. Core features are
its Hardware Design wit Radio Connectivity suc as Wi-Fi and BLE. Apart from t e radio connectivity
options, t e BWCADAPTER is also capable of standard industrial interfaces like micro SATA, RS-485, and
MODBUS.
T is document mainly describes BWCADAPTER from a Hardware point of view, t ere are separate
software development manuals t at can be also consulted.
For any furt er support contact Bradford W ite support services at iot.app@bradfordw ite.com
1.2 Scope
T e scope of t is document is to detail out aspects of BWCADAPTER design, specifications, Features, etc.
T is document, encefort , is to be used as a direct reference by end customers t at use t is product.
Bradford W ite's team will also use t is document to review, approve, and accept t e product design
for s owcase purposes.
1.3 Acronyms & Abbreviations
Terms
Definition
SoC
System
on
C ip
CPU
Central
Processing
Unit
BLE
Bluetoot
Low
Energy
IoT
Internet
of
t ings
RST
Reset
UART
Universal
async ronous
receiver-transmitter
LED
Lig t
Emitting
Diode
GPIO
General
Purpose
Input/output
TBD
To
Be
Determined
Etc Et Criteria
Table 2: Acronyms & Abbreviations
1.4 References
Sr
No
Reference
Document
Title
Provided
by
Remarks
1
Sc ematics
design
Bradford
W ite
Primary
reference
2 Layout design Bradford W ite N/A
Table 3: References

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2 PRODUCT OVERVIEW
Figure 1 BWCADAPTER
Figure 2 BWCADAPTER PCBA

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T e BWCADAPTER system is a smart ome/commercial system t at will enable residential and
commercial water eaters and boilers to be smart, w ic means t e user can control t e eater,
monitor t e energy consumption, and receive alerts w enever t e eater runs into any flaw,
specifications are as follows,
•GEA2 and Modbus RTU connectivity to Water eater/boilers
•Wi-Fi connectivity to t e Ayla cloud
•BLE connectivity for provisioning and local debugging/maintenance
•Robust, reliable, and low-cost product design and development wit FCC, IC, UL, and Wi-Fi
Alliance certifications
•CTA/CEA-2045-A compliant solution using SkyCentrics or e-Radio DC UCM module (Note:
CEA/CTA-2045-A is t e latest and supersedes earlier versions)
•IP51 compliant enclosure for residential usage
•End-to-end product development and validation
•Efficient Program/Account Management and Communication wit t e flexibility of On-Site
support
•Best Value’ proposition for Quality Tec nical Solution, Cost, Capabilities, Program Management,
Support & Service and Sound Financial Healt
T e BWCADAPTER device integrates Espressif systems radio module aving FCC ID : 2AC7Z-
ESP32WROOM32D for radio communication. T e module is integrated to t is product as per t e
module integration rule and integration details as been taken into account for t e determination of t e
delta test scope.
Installation
Before installation of t e Bradford W ite Connect Adapter, verify t at t e water eater is fully
installed. Bradford W ite recommends installation is done by a plumbing professional.
Additionally, download t e Bradford W ite Connect App onto your mobile device. T e following
are installation guidelines for t e Adapter:
○ Mount t e Adapter onto a wall near t e water eater using supplied screws or directly
onto t e eater itself using t e supplied interlocking strips. Please do not screw t e
Adapter onto t e water eater.
○ Plug one end of an Et ernet cable into t e RJ45 port on t e Adapter and anot er into t e
RJ45 port on t e water eater. Supplied wit t e Bradford W ite Connect Adapter is a
10ft Et ernet cable. Please use eit er t is cable or a similar one up, to a lengt of _____.
○ Plug Power Supply into 120V voltage source. At t is point, t e indicator lig t s ould turn
amber.

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○ Open t e Bradford W ite Connect App and log in using your email and password. To sign
up, click t e Homeowner sign up in t e bottom left corner of t e screen and follow t e
on-screen instructions. Once logged in, begin t e pairing process by clicking Add Water
Heater and following t e on-screen instructions.
○ To Discover t e Adapter, first old t e action button on t e Adapter for 3 seconds. T is
will begin t e Bluetoot pairing mode, indicated by a flas ing blue LED lig t on t e
Adapter. Your Adapter will now be discoverable by your mobile device.
○ Select t e Adapter from t e Discover screen, t e mobile device will prompt you for a 4
digit code. Plug in t e last four digits of your Adapter’s serial number, w ic can be
found on t e front label of t e Adapter. T is step is for multifactor aut entication and is
for security purposes.
○ Once your Adapter and mobile device are connected via Bluetoot , your mobile device
will prompt you to select a local wireless network. Select t e network of your c oosing
and enter t e password using your mobile device.
○ If your Adapter is successfully able to connect to t e wireless network, you will see t is
screen. If empty, type in t e serial number of t e water eater or click t e box to scan
t e barcode on t e side of t e eater. If your installing contractor uses t e Bradford
W ite Connect App, t is step may already be complete. Click next on t e
Congratulations page to complete t e installation.
Control & Monitor
○ T e system allows t e user to control t e eater’s temperature from t e mobile
application using iOS or Android mobile p one. T e user can also monitor t e energy
consumed by t e eater using t e mobile application.
Alert
○ T e system will alert t e omeowner about any fault t at t e eater encounters and
using t e mobile application, t e omeowner can contact t e contractor and can get
t e eater fixed.

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2.1 System Block Diagram
Figure 3 System Block Diagram of BWCADAPTER

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2.2 Features and Functionality
T e table below lists t e major features and functions of t e BWCADAPTER.
Block
Feature
Parameter
Specification
1
CPU
Core
&
Frequency
ESP32-D2WD
2 Memory
Integrated
Flas
16MB(128
Mb)
External
Flas
16MB(128
Mb)
3 Interfaces
Et ernet
1
x
GEA2
SPI
1
x
Flas
memory
1
x
micro
SATA
for
CTA-2045
Dongle
Wi-Fi
+
BLE
BLE
4.2,
Wi-Fi
802.11
b/g/n
Serial
Communication
RS485
4User Interface/
IO
Switc
1x
user-configurable
switc
LEDs
1x
power
LED
1x
Wi-Fi/BLE
connection
configuration
Debug Port 1x UART port for debugging
Table 4 Features a d Fu ctio s of BWCADAPTER

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3 MAJOR COMPONENTS ON BWCADAPTER
Sr
No
Processor
Series
ESP-WROOM-32D
1
Mfg.
Part
ESP32-WROOM-32D
(16MB)
2
Core
ESP32-D2WD
3
Maximum
Clock
Frequency
240
MHz
4
Memory
Type
Flas
5
Applications
Consumer/
Industrial
products
6 Perip erals
18
x
25.5
mm
Module
Consumer:
-40
to
85
o
C
SPI
x
4
I2S
X
2
I2C
X
2
SD/eMMC/SDIO
HOST
X
1
SDIO/SPI
SLAVE
X
1
ETH
MAC
X
1
CAN
X
1
UART
X
3
ADC
8-bit
X
2
GPIO X 34
Table 5 Applicatio s Processor Details
3.1 Wireless Connectivity
BWCADAPTER as on-board ESP-WROOM-32D wireless module. Below are major features of wireless
perip eral. More information regarding t e wireless module can be obtained from t eir respective
websites and data-s eets.
T e BWCADAPTER device integrates Espressif systems radio module aving FCC ID : 2AC7Z-
ESP32WROOM32D for radio communication. T e module is integrated to t is product as per t e
module integration rule and integration details as been taken into account for t e determination of t e
delta test scope.
3.2 Wi-Fi + Bluetooth Combo Module
T e BWCADAPTER uses an ESP-WROOM-32D Wi-Fi + Bluetoot combo module. ESP32 is a single 2.4 GHz
Wi-Fi and Bluetoot combo c ip designed wit t e TSMC ultra-low-power 40nm tec nology. It is
designed to ac ieve t e best power and RF performance, s owing robustness, versatility, and reliability
in a wide variety of applications and power scenarios.
3.3 Power Supply
T e BWCADAPTER as only one power option:
DC Jack: Uses a 5V, 1.2A DC power adaptor.

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3.4 Antenna details
Sr Radio Description Manufacturer Part No Gain
1 Wi-Fi/BLE 2.4 GHz Espressif Systems ESP-WROOM-32D 3.7 dBi
Table 6 A te a Details
BWCADATPER works on different protocol wit different power level as per below data;
Protocol Power
(dBm)
Antenna gain
(dBi)
Wi-Fi 17.92 3.7
BT 1.90 3.7
BLE -11.47 3.7

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4 PERIPHERAL INTERFACES
T is section describes t e interfaces of BWCADAPTER. T e below figure s ows t e available interfaces
of BWCADAPTER. Figure 4 describes t e perip eral interfaces of BWCADAPTER pictorially.
Figure 4 I terfaces o BWCADAPTER
4.1 Ethernet
T e BWCADAPTER as 1 x RJ45 Et ernet port for GEA2 protocol to connect t e water eater control unit.
4.2 Serial Ports
T e BWCADAPTER supports RS-485 ports. Serial port access is possible t roug a terminal block
connector on t e top front end side of t e BWCADAPTER unit.
4.3 Debug Port
T e BWCADAPTER as an inbuilt debug UART port wit six pins. Debug is only possible if t e user can
access BWCADAPTER PCBA. It is to be noted t at t e UART signaling occurs at 3.3V logic levels and t e
pins are not 5V tolerant. A user can enter t e debug prompt on a PC/Mac using a normal 3.3V logic USB
to UART converter.

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T ese are t e parameters to establis a debug UART connection wit BWCADAPTER:
Baud rate: 115200
Data bits: 8
Parity: None
Stop bits: 1
Flow control: None
Figure 5 Debug Port

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4.4 Switch
T e BWCADAPTER as one pus -button switc on t e front panel. T is switc is completely user-
configurable and users can use it as per t eir use case. Figure 6 describes t e switc on BWCADAPTER.
Figure 6 User Co figurable Switch
4.5 LED's
T e BWCADAPTER as two inbuilt LED's. One LED is used to indicate w et er t e BWCADAPTER is
powered ON or OFF and t e remaining one is to indicate t e Wi-Fi and BLE connectivity. Figure 7 s ows
t e location of t ese LEDs on t e BWCADAPTER.
Figure 7 LED's o BWCADAPTER

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Sr No LED LED Colour Function
1 PWR Green ON: BWCADAPTER powered ON
OFF: BWCADAPTER powered OFF
2 Status LED Tri-color Status : Wi-Fi + BLE
Table 7 LED's

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5 ELECTRICAL THERMAL & ANTENNA RANGE CHARACTERISTICS
5.1 Recommended Operating Conditions
Sr No Description
Value
Unit
Minimum
Typical
Maximum
1
Operating
voltage
4.75
5
5.5
V
2
Current
consumption
-
-
1.2
A
3 Operating temperature range (ambient) -20 25 65 °C
Table 8 Recomme ded Operati g Co ditio s

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6 MECHANICAL DIMENSIONS
T e dimensions of BWCADAPTER are 184.3 x 88 x 26.5 mm (L x W x H). T e figure s ows t e dimensions
in more detail.
Note: All dimensions are in millimeters (mm) unless ot erwise specified.
Figure 8 BWCADAPTER Dime sio s

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APPLICATION NOTES
Safety Precautions
T ese specifications are intended to preserve t e quality assurance of products as individual
components.
Before use, c eck, and evaluate t e module’s operation w en mounted on your products. Abide by
t ese specifications w en using t e products. T ese products may s ort-circuit. If electrical s ocks,
smoke, fire, and/or accidents involving uman life are anticipated w en a s ort circuit occurs, t en
provide t e following fail-safe functions as a minimum:
1. Ensure t e safety of t e w ole system by installing a protection circuit and a protection device.
2. Ensure t e safety of t e w ole system by installing a redundant circuit or anot er system to
prevent a single fault causing an unsafe status.
Design Engineering Notes
1. Heat is t e major cause of s ortening t e life of t e modules. Avoid assembly and use of t e target
equipment in conditions w ere t e product’s temperature may exceed t e maximum allowable.
2. Failure to do so may result in t e degrading of t e product’s functions and damage to t e product.
3. If pulses or ot er transient loads (a large load applied in a s ort time) are applied to t e products,
before use, c eck and evaluate t eir operation w en assembled onto your products.
4. T ese products are not intended for ot er uses, ot er t an under t e special conditions s own
below. Before using t ese products under suc special conditions, c eck t eir performance and
reliability under t e said special conditions carefully, to determine w et er or not t ey can be used
in suc a manner.
5. In liquid, suc as water, saltwater, oil, alkali, or organic solvent, or in places w ere liquid may splas .
Indirect sunlig t, outdoors, or in a dusty environment. In an environment w ere condensation
occurs. In an environment wit a ig concentration of armful gas (ex. salty air, HCl, Cl2, SO2, H2S,
NH3, and NOx).
6. If an abnormal voltage is applied due to a problem occurring in ot er components or circuits,
replace t ese products wit new products because t ey may not be able to provide normal
performance even if t eir electronic c aracteristics and appearances appear satisfactory.
7. Mec anical stress during assembly of t e board and operation must be avoided.
8. Pressing on parts of t e metal cover or fastening objects to t e metal cover is not permitted.