HELTEC HT-CT62 LoRa Module Owner’s Manual

: September 16, 2024
: HELTEC

Table of Contents

HT-CT62 LoRa Module
Specifications
Product Usage Instructions
1. Description
- 1.1 Overview
2. Pin Definition
- 2.1 Pin Assignment
- 2.2 Pin Description
3. Specifications
- 3.1 Physical Dimensions
4. Resource
Q: Can the HT-CT62 module be used for outdoor

HT-CT62 LoRa Module

Specifications

Product: HT-CT62 LoRa module
Manufacturer: Chengdu Heltec Automation Technology Co.,
Ltd.
Communication: LoRa/LoRaWAN
Microprocessor: ESP32-C3FN4 (32-bit RISC-V architecture)
Transceivers: Semtech LoRa SX1262
Wireless Communication: 2.4 GHz Wi-Fi, LoRa modes
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

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.