HELTEC HT-CT62 LoRa Module Owner’s Manual
- September 16, 2024
- HELTEC
Table of Contents
HT-CT62 LoRa Module
Specifications
-
Product: HT-CT62 LoRa module
-
Manufacturer: Chengdu Heltec Automation Technology Co.,
Ltd. -
Communication: LoRa/LoRaWAN
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Microprocessor: ESP32-C3FN4 (32-bit RISC-V architecture)
-
Transceivers: Semtech LoRa SX1262
-
Wireless Communication: 2.4 GHz Wi-Fi, LoRa modes
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Features: Long communication range, low power consumption, high
sensitivity, low cost
Product Usage Instructions
1. Description
1.1 Overview
The HT-CT62 is a compact LoRa/LoRaWAN node module designed for
applications requiring long-range, low-power wireless
communication. It features the ESP32-C3FN4 microprocessor based on
RISC-V architecture and Semtech LoRa Transceivers (SX1262),
providing high sensitivity and cost-effective connectivity. The
module supports 2.4 GHz Wi-Fi and LoRa modes, making it suitable
for smart cities, smart farms, smart homes, and IoT projects.
2. Pin Definition
2.1 Pin Assignment
The pinout of the HT-CT62 module is as follows:
- Pin 1 – Description 1
- Pin 2 – Description 2
- Pin 3 – Description 3
2.2 Pin Description
Detailed description of each pin functionality and connection
guidelines will be provided in the official documentation.
3. Specifications
3.1 Physical Dimensions
The physical dimensions of the HT-CT62 module are as
follows:
- Length: XX mm
- Width: XX mm
- Height: XX mm
4. Resource
4.1 Relevant Resource
For additional resources, such as datasheets, application notes,
and software tools, please refer to the official website of
Heltec.
4.2 Contact Information
If you have any questions or need technical support, you can
contact Heltec Automation Technology Co., Ltd. through the provided
contact information.
Frequently Asked Questions (FAQ)
Q: Can the HT-CT62 module be used for outdoor
applications?
A: Yes, the HT-CT62 module is suitable for outdoor applications
due to its long communication range and robust design.
HT-CT62 LoRa module
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Document version
Version
Time
Rev. 1.0
2022-8-16
Rev. 1.1
2022-9-17
Description Preliminary version Typographic modification
Remark 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
HT-CT62………………………………………………………………………………………………………….. 1
Document version………………………………………………………………………………………… 2
Copyright Notice……………………………………………………………………………………………2
Disclaimer……………………………………………………………………………………………………. 2
Content………………………………………………………………………………………………………..3
1. Description…………………………………………………………………………………………… 4 1.1
Overview………………………………………………………………………………………….. 4 1.2 Product
features…………………………………………………………………………………4
2. Pin Definition…………………………………………………………………………………………5 2.1 Pin
assignment………………………………………………………………………………….. 5 2.2 Pin
description……………………………………………………………………………………6
3. Specifications……………………………………………………………………………………….. 7 3.1 General
specifications………………………………………………………………………… 7 3.2 Electrical
characteristics………………………………………………………………………8 3.2.1 Power
supply………………………………………………………………………………8 3.2.2 Power
characteristics………………………………………………………………….. 8 3.3 RF
characteristics………………………………………………………………………………..9 3.3.1 Transmit
power………………………………………………………………………….. 9 3.3.2 Receiving
sensitivity……………………………………………………………………. 9 3.4 Operation
frequencies……………………………………………………………………….. 9
4. Specifications……………………………………………………………………………………… 11 4.1 Physical
dimensions…………………………………………………………………………. 11
5. Resource……………………………………………………………………………………………..12 5.1 Relevant
Resource…………………………………………………………………………….12 5.2 Contact
Information…………………………………………………………………………. 12
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1. Description 1.1 Overview
HT-CT62 is a LoRa/LoRaWAN node module with a long communication range, low
power consumption, high sensitivity, and low cost. The module is composed up
of ESP32-C3FN4(32-bit microprocessor based on RISC-V architecture) and Semtech
LoRa Transceivers (SX1262). The module integrating 2.4 GHz Wi-Fi, LoRa modes
wireless communication. HT-CT62 is a small volume, stamp hole package module,
it’s the best choice for smart cities, smart farms, smart home, and IoT
makers.
HT-CT62 are available in two product variants:
Table 1.1: Product model list
No.
Model
Description
470~510MHz working LoRa frequency, used for China
1
HT-CT62-LF
mainland (CN470) LPW band.
For EU868, IN865, US915, AU915, AS923, KR920 and
2
HT-CT62-HF
other LPW networks with operating frequencies
between 863~928MHz.
1.2 Product features
Microprocessor: ESP32-C3FN4 (RISC-V architecture 32-bit, main frequency up to
160 MHz)
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Support the Arduino development environment; LoRaWAN 1.0.2 support; Ultra low
power design, 10uA in deep sleep; 1.27 stamp edge design for SMT; Good
impendence matching and long communication distance. Integrated WiFi, network
connection, onboard Wi-Fi, dedicated IPEX socket.
2. Pin Definition 2.1 Pin assignment
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2.2 Pin description
Table 2.2: Pin description
No.
Name Type Function
1 2.4G ANT O 2.4G ANT Output
2
GND
P Ground
3
7
I/O GPIO7, FSPID, MTDO, connected to SX1262_MOSI
4
6
I/O GPIO6, FSPICLK, MTCK, connected to SX1262_MISO
5
5
I/O GPIO5, ADC2_CH0, FSPIWP MTDI, connected to SX1262_RST
6
4
I/O GPIO4, ADC1_CH4, FSPIHD, MTMS, connected to SX1262_BUSY
7
3
I/O GPIO3, ADC1_CH3, connected to SX1262_DIO1
8
2
I/O GPIO2, ADC1_CH2, FSPIQ
9
1
I/O GPIO1, ADC1_CH1, 32K_XN
10
0
I/O GPIO0, ADC1_CH0, 32K_XP
11
EN
I CHIP_EN
12
VDD
P 3.3V Power Supply
13
GND
P Ground
14
10
I/O GPIO10, FSPICS0, connected to SX1262_SCK
15
9
I/O GPIO9
16
8
I/O GPIO8, connected to SX1262_NSS
17
18
I/O GPIO18, USB_D-
18
19
I/O GPIO19, USB_D+
19
RXD
I/O U0RXD, GPIO20
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20
TXD
I/O U0TXD, GPIO21
21
GND
P Ground
22 LoRa ANT O LoRa ANT Output.
3. Specifications 3.1 General specifications
Table 3.1: General specifications
Parameters
Description
Master Chip
ESP32-C3FN4(32-bit@RISC-V architecture)
WiFi
802.11 b/g/n, up to 150Mbps
LoRa Chipset
SX1262
Frequency
470~510MHz, 863~928MHz
Max. TX Power
21±1dBm
Max. Receiving sensitivity -134dBm
Hardware Resource
5ADC1+1ADC2; 2UART; 1I2C; 3SPI; 15GPIO; etc.
Memory
384KB ROM; 400KB SRAM; 8KB RTC SRAM; 4MB SiP Flash
Interface
2.4G ANT (IPEX1.0); LoRa ANT(IPEX1.0); 2111.27 spacing Stamp hole
Power consumption
Deep Sleep 10uA
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Operating temperature Dimensions Package
-40~85 17.78 17.78 2.8mm Tape & Reel Packaging
3.2 Electrical characteristics
3.2.1 Power supply
Power supply mode 3V3 pin (150mA)
Table 3.2.1: Power supply
Minimum Typical Maximum Company
2.7
3.3
3.5
V
3.2.2 Power characteristics
Table3.2.2: Power characteristics
Mode
Condition
Min. Typical Max. Company
WiFi Scan 3.3V Powered
80
mA
WiFi AP 3.3V Powered
120
mA
470MHz, 3.3V Powered, 14dBm
120
mA
TX 470MHz, 3.3V Powered, 17dBm
140
mA
470MHz, 3.3V Powered, 22dBm
170
mA
RX 470MHz, 3.3V Powered
40
mA
Sleep 3.3V powered
10
A
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3.3 RF characteristics 3.3.1 Transmit power
Operating frequency band (MHz) 470~510 863~870 902~928
Table3.3.1 Transmit power
Maximum power value/[dBm] 21 ± 1 21 ± 1 21 ± 1
3.3.2 Receiving sensitivity
The following table gives typically sensitivity level of the HT-CT62.
Table3.3.2 Receiving sensitivity
Signal Bandwidth/[KHz]
Spreading Factor
Sensitivity/[dBm]
125
SF12
-134
125
SF10
-130
125
SF7
-122
3.4 Operation frequencies
HT-CT62 supports LoRaWAN frequency channels and models corresponding table.
Table3.4: Operation frequencies
Region EU433 CN470
Frequency (MHz) 433.175~434.665
470~510
Model HT-CT62-LF HT-CT62-LF
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IN868 EU868 US915 AU915 KR920 AS923
865~867 863~870 902~928 915~928 920~923 920~925
HT-CT62-HF HT-CT62-HF HT-CT62-HF HT-CT62-HF HT-CT62-HF HT-CT62-HF
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4. Specifications 4.1 Physical dimensions
17.78 0.5
16
0.8
N
2.8
17.78
N=10*1.27
PAD
1
0.6
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5. Resource 5.1 Relevant Resource
Recommend hardware design Pin map Downloadable resource Footprint
5.2 Contact Information
Heltec Automation Technology Co., Ltd Chengdu, Sichuan, China Email:
support@heltec.cn Phone: +86-028-62374838 https://heltec.org
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FCC Statement 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. Changes or
modifications not expressly approved by the party responsible for compliance
could void the user’ s authority to operate the equipment. NOTE: This
equipment has been tested and found to comply with the limits for a Class B
digital device, pursua nt to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful inte rference in a
residential installation. This equipment generates uses and can radiate radio
frequency energy a nd, if not installed and used in accordance with the
instructions, may cause harmful interference to radio com munications.
However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turn ing the
equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures: – Reorient or relocate
the receivingantenna. – Increase the separation between the equipment and
receiver. -Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected. -Consult the dealer or an experienced
radio/TV technician for help important announcement Important Note: Radiation
Exposure Statement This equipment complies with FCC radiation exposure limits
set forth for an uncontrolled environment. This equipment should be installed
and operated with minimum distance 20cm between the radiator and your body.
This transmitter must not be co-located or operating in conjunction with any
other antenna or transmitter. Country Code selection feature to be disabled
for products marketed to the US/Canada. This device is intended only for OEM
integrators under the following conditions: 1. The antenna must be installed
such that 20 cm is maintained between the antenna and users, and 2. The
transmitter module may not be co-located with any other transmitter or
antenna, 3. For all products market in US, OEM has to limit the operation
channels in CH1 to CH11 for 2.4G band
by supplied firmware programming tool. OEM shall not supply any tool or info
to the end-user regarding to Regulatory Domain change. (if modular only test
Channel 1-11) As long as the three conditions above are met, further
transmitter testing will not be required. However, the OEM integrator is still
responsible for testing their end-product for any additional compliance
requirements required with this module installed.
Important Note: In the event that these conditions cannot be met (for example
certain laptop configurations or co-location with another transmitter), then
the FCC authorization is no longer considered valid and the FCC ID cannot be
used on the final product. In these circumstances, the OEM integrator will be
responsible for re-evaluating the end product (including the transmitter) and
obtaining a separate FCC authorization.
End Product Labeling The final end product must be labeled in a visible area
with the following” Contains FCC ID: 2A2GJ-HT-CT62 ”
Manual Information to the End User The OEM integrator has to be aware not to
provide information to the end user regarding how to install or remove this RF
module in the user’s manual of the end product which integrates this module.
The end user manual shall include all required regulatory information/warning
as show in this manual.
Integration instructions for host product manufacturers according to KDB
996369 D03 OEM Manual v01r01 2.2 List of applicable FCC rules
CFR 47 FCC PART 15 SUBPART C has been investigated. It is applicable to the
modular transmitter
2.3 Specific operational use conditions
This module is stand-alone modular. If the end product will involve the
Multiple simultaneously transmitting condition or different operational
conditions for a stand-alone modular transmitter in a host, host manufacturer
have to consult with module manufacturer for the installation method in end
system.
2.4 Limited module procedures
Not applicable
2.5 Trace antenna designs
Not applicable
2.6 RF exposure considerations
This equipment complies with FCC radiation exposure limits set forth for an
uncontrolled environment. This equipment should be installed and operated with
minimum distance 20cm between the radiator & your body.
2.7 Antennas This radio transmitter FCC ID:2A2GJ-HT-CT62 has been approved by
Federal Communications Commission 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.
Antenna No.
Bluetooth 2.4G Wi-Fi LoRa DSS LoRa DTS
Model No. of antenna:
/ / / /
Type of antenna:
Dipole Antenna Dipole Antenna Spring Antenna Spring Antenna
Gain of the antenna (Max.)
3.0 3.0 1.1 1.1
Frequency range:
2402-2480MHz 2412-2462MHz 902.3-914.9MHz 903-914.2MHz
2.8 Label and compliance information
The final end product must be labeled in a visible area with the following”
Contains FCC ID:2A2GJ-HT-CT62″.
2.9 Information on test modes and additional testing requirements
Host manufacturer is strongly recommended to confirm compliance with FCC
requirements for the transmitter when the module is installed in the host.
2.10 Additional testing, Part 15 Subpart B disclaimer
Host manufacturer is responsible for compliance of the host system with module
installed with all other applicable requirements for the system such as Part
15 B.
2.11 Note EMI Considerations
Host manufacture is recommended to use D04 Module Integration Guide
recommending as “best practice” RF design engineering testing and evaluation
in case non-linear interactions generate additional non-compliant limits due
to module placement to host components or properties.
2.12 How to make changes
This module is stand-alone modular. If the end product will involve the
Multiple simultaneously transmitting condition or different operational
conditions for a stand-alone modular transmitter in a host, host manufacturer
have to consult with module manufacturer for the installation method in end
system. According to the KDB 996369 D02 Q&A Q12, that a host manufacture only
needs to do an evaluation (i.e., no C2PC required when no emission exceeds the
limit of any individual device (including unintentional radiators) as a
composite. The host manufacturer must fix any failure.