Heltec Automation HRI-3622 User manual

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HRI-3622
Sensor Hub Bus Transformer
————Driving third-party Sensor

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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-3622 ................................................................................. 2
Sensor Hub Bus Transformer ............................................ 2
Document version .......................................................................... 3
Copyright Notice .............................................................................3
Disclaimer .......................................................................................3
1. Description ............................................................................. 5
1.1 Overview ............................................................................. 5
1.2 Product features ................................................................. 6
2. Specifications ........................................................................ 7
2.1General 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.Hardware characteristics ................................................... 10
3.1Physical Dimensions ...........................................................10
3.2 interface definition ............................................................10
4.Resource ................................................................................ 11
4.1Relevant resource .............................................................. 11
4.2Heltec Contact Information ................................................11

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1. Description
1.1 Overview
HRU-3622 is a sub-model of the Sensor Hub for outdoor series that
specifically drives third-party sensors. Its interface is a flange seat, with
RS-485 interfaces and 4 GPIO interfaces, can be used to connect RS-485
sensors directly.
Sensor Hub for Industry has excellent low power consumption and long
transmission distance characteristics, comes with a built-in 1100mAh
rechargeable battery.The stainless-steel shell and high-strength plastic
provide an IP66 protection level, allowing it to perform stably and
excellently in complex industrial environments.
HRI-3622 are available in 3 product variants:
No.
Model
Description
1
HRI-3622-470
470~510MHz working LoRa frequency, used for
China mainland (CN470) LPW band
2
HRI-3622-868
863~870MHz working LoRa frequency, used for
EU868, IN865 LPW bands.
3
HRI-3622-915
902~923MHz working frequency, used for
AS923, US915, AU915, KR920 LPW bands.

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1.2 Product features
Industrial grade protection structure, IP66 protection grade.
Ultra-low power consumption design, built-in 1000mAh 18350 rechargeable
battery.
Compatible with wall fixing or cylinder fixing.
Wireless data transmission communication radius up to 3km (no occlusion).
Working temperature1: --20~60°C,Working humidity: ≤90% (non-condensing).
Power supply mode: built-in battery or external 5V DC powersupply.
Can register by scanning the QR code through the APP, or easily register through
the device WiFi.
1This refers to the operating temperature and humidity of the circuit and battery, not the sensor.

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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%
Interface
Flange Seat
Input format
RS485
Microcontroller
Heltec Wireless Shell
Sensor module
Custom
LoRaWAN Channel Plan
EU868/US915/AU915/ AS923/KR920/RU864/CN470
Max. Receiving Sensitivity
-136dBm@SF12 BW=125KHz
Max. TX Power
+20 ±2 dBm
Communication Distance
2 to 6km (depending on gateway antenna and
environments)
IP Rating
IP66
Operating Temperature
-20 ~ 60 ℃
Operating Humidity
10% ~100%, no-condensing
Battery Capacity
1100mAh
Battery Type
18350

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2.2 Operating conditions
2.2.1 Power supply range
Table 2.2: Power supply range
Parameter
Min.
Typical
Max.
Unit
Device operating input voltage
2.7
3.7
5
V
2.2.2 Power consumption @3.7V
Table 2.2.1: Working current
Mode
Condition
Min.①
Max.②
Active-Mode (TX)
TX power is 22dBm @3.7 supply.
200mA
235mA
Active-Mode (RX)
TX disabled; RX enabled.
35mA
42mA
Deepsleep
25~40μA
2.3 RF characteristics
The following table gives typically sensitivity level of the Sensor Hub.
Table 2.4: LoRa RF characteristics
Signal Bandwidth/[KHz]
Spreading Factor
Sensitivity/[dBm]
125
SF12
-135
125
SF10
-133
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.Hardware characteristics
3.1Physical Dimensions
3.2 interface definition

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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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