Heltec Automation HRI-3621 User manual

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HRI-3621
Sensor Hub for Industry

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Document version
Version
Time
Description
Remark
Rev. 1.0
2023-4-26
Preliminary version
Aaron
Copyright Notice
All contents in the files are protected by copyright law, and all copyrights are reserved
by Chengdu Heltec Automation Technology Co., Ltd. (hereinafter referred to as Heltec).
Without written permission, all commercial use of the files from Heltec are forbidden,
such as copy, distribute, reproduce the files, etc., but non-commercial purpose,
downloaded or printed by individual are welcome.
Disclaimer
Chengdu Heltec Automation Technology Co., Ltd. reserves the right to change, modify
or improve the document and product described herein. Its contents are subject to
change without notice. These instructions are intended for you use.

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Content
HRI-3621 .......................................................................................2
Document version ......................................................................3
Copyright Notice ........................................................................ 3
Disclaimer .................................................................................. 3
1. Description ............................................................................5
1.1 Overview ........................................................................... 5
1.2 Product features ............................................................... 6
2. Specifications ........................................................................ 7
2.1 General specification ........................................................ 7
2.2 Operating conditions .....................................................8
2.2.1 Power supply range.....................................................8
2.2.2 Power consumption @3.7V ....................................... 8
2.3 RF Characteristics ..............................................................8
2.4 LoRaWAN Frequency .........................................................9
2.5 LED indicator light description .......................................... 9
3.Physical Dimensions (Unit:mm) ........................................... 10
4.Resource ...............................................................................10
4.1Relevant resource ............................................................ 10
4.2Heltec Contact Information ............................................. 10

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1. Description
1.1 Overview
Sensor Hub is a ready-to-use LoRa/LoRaWAN sensor for indoor (industrial)
applications. Modular design allows for the replacement of sensor probes to adjust
different projects. The device can be registered by one key via APP and Heltec Snap
Emu IoT Platform.
Sensor Hub for Industry has excellent low power consumption characteristics and
LoRa provides Long-distance transmission capability. It comes with a built-in
1100mAh rechargeable battery and magnetic charging interface. The stainless-steel
shell and high-strength plastic provide an IP66 protection level, allowing it to perform
stably and excellently in complex industrial environments.
Depending on the frequency band, Sensor Hub for Industry are available in 4 product variants:
No.
Model
Description
1
HRI-3621-470~510
470~510MHz working LoRa frequency, used for
China mainland (CN470) LPW band
2
HRI-3621-863~870
863~870MHz working LoRa frequency, used for
EU868, IN865 LPW bands.
3
HRI-3621-902~928
902~923MHz working frequency, used for
AS923, US915, AU915, KR920 LPW bands.

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1.2 Product features
High extensibility, multi-sensor optional1.
Industrial grade protection structure, IP66 protection grade.
Ultra-low power consumption design, built-in 1100 mAh 18350 rechargeable
battery.
Compatible with wall fixing, cylinder fixing or rail fixing.
Wireless data transmission communication radius up to 3km (no occlusion).
Working condition: -20~60°C2, Working humidity: ≤90% (non-condensing).
Power supply mode: built-in battery, can be charged by 5V DC power supply.
Easy configure via Wi-Fi, or register by scanning the code with one click through
the APP.
1The sensor will be soldered to the adapter board at the time of purchase;
2Its own operating temperature, part of the sensor can work within a smaller range.

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2. Specifications
2.1 General specification
Table 2.1 General specification
Parameters
Description
Recommended operating
condition
-20~ 60℃, 10 ~ 90(no condensing) RH%
Microcontroller
Heltec Wireless Shell
Sensor module
Customization3
LoRaWAN channel plan
EU868/US915/AU915/ AS923/KR920/RU864/CN470
Max. Receiving sensitivity
-135dBm@SF12 BW=125KHz
Max. TX Power
+20±2dBm
External power supply and
charging voltage
5V DC
Communication Distance
1.5 to 5km (depending on gateway antenna and
environments)
IP Rating
IP66
Battery Capacity
1100mAh rechargeable
Battery Type
18350
Dimension
86x36 cylinder
3Sensors need to be welded, please indicate when placing the order.

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2.2 Operating conditions
2.2.1Power supply range
Table 2.2: Power supply range
Parametr
Min.
Typical
Max.
Unit
Charging Voltage @DC
5
V
Built-in Battery Power
3
3.7
4.1
V
2.2.2Power consumption @3.7V
Table 2.2.1: Working current
Mode
Condition
Typical
Unit
Active-Mode
(TX)
TX power is 22dBm @3.7 supply
140
mA
Active-Mode
(RX)
TX disabled; RX enabled
45
mA
Deepsleep
25~40
μA
2.3 RF Characteristics
The following table gives typically sensitivity level of the HRI-3621 .
Table 2.4: LoRa RF characteristics
Signal Bandwidth/[KHz]
Spreading Factor
Sensitivity/[dBm]
125
SF12
-135
125
SF10
-132
125
SF7
-125
125
SF5
-121
250
SF9
-124

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2.4 LoRaWAN Frequency
Note: No Frequency limitation. Except CN470, the sensor can be switched to other frequency
plans at any time.
2.5 LED indicator light description
LED Color
Condition
Description
White
Steady on
Long press the button, the white light means to enter
the working mode, release and then go out
Yellow
Steady on
Long press the button, the yellow light means to
enter the configuration mode
Blue
Blink
The button flashes, wakes up the device, and sends a
message once
Green
Blink
Flash once after successful transmission
Purple
Blink
Flash once after successful reception
Red
Blink
Charge in working mode, press the button once
flashing red light; The charging red light is always on
in configuration mode
Frequency Plan
Common Name
Sub-band
EU863-870
EU868
--
US902-928
US915
Sub-band from 1 to 8
AU915-928
AU915
Sub-band from 1 to 8
AS923
AS923
AS923_1, AS923_2, AS923_3, AS923_4
KR920-923
KR920
--
RU864-867
RU864
--
CN470-510
CN470
--

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3.Physical Dimensions (Unit:mm)
4.Resource
4.1Relevant resource
⚫User's manual
⚫Related Downloads
⚫Heltec LoRaWAN test server based on TTS V3
4.2Heltec Contact Information
Heltec Automation Technology Co., Ltd Chengdu,
Sichuan, China
Email: [email protected]
Phone: [phone]
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