HELTEC HT-N5262 Mesh Node With Bluetooth And LoRa
Product Information
Specifications
- MCU: nRF52840
- LoRa Chipset: SX1262
- Memory: 1M ROM; 256KB SRAM
- Bluetooth: Bluetooth 5, Bluetooth mesh, BLE
- Storage Temperature: -30°C to 80°C
- Operating Temperature: -20°C to 70°C
- Operating Humidity: 90% (Non-condensing)
- Power Supply: 3-5.5V (USB), 3-4.2V (Battery)
- Display Module: LH114T-IF03
- Screen Size: 1.14 Inch
- Display Resolution: 135RGB x 240
- Display Colors: 262K
Product Usage Instructions
Overview
The Mesh Node with Bluetooth and LoRa features a powerful display function (optional) and various interfaces for extensibility.
Product Features
- MCU: nRF52840 (Bluetooth), LoRa chipset SX1262
- Low power consumption: 11uA in deep sleep
- Type-C USB interface with complete protection measures
- Operating condition: -20°C to 70°C, 90%RH (Non-condensing)
- Compatible with Arduino, providing development frameworks and libraries
Pin Definitions
The product includes various pins for power, ground, GPIOs, and other interfaces. Refer to the manual for detailed pin mappings.
Frequently Asked Questions (FAQ)
- Q: Can the Mesh Node be powered by a battery?
A: Yes, the Mesh Node can be powered by a battery within the specified voltage range of 3-4.2V. - Q: Is the display module mandatory for using the Mesh Node?
A: No, the display module is optional and can be omitted if not required for your application. - Q: What is the recommended operating temperature for the Mesh Node?
A: The recommended operating temperature range for the Mesh Node is -20°C to 70°C.
Document Version
| Version | Time | Description | Remark |
| Rev. 1.0 | 2024-5-16 | Preliminary version | Richard |
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.
Description
Overview
Mesh Node is a development board based on nRF52840 and SX1262, supports LoRa communication and Bluetooth 5.0, and provides a variety of power interfaces (5V USB, lithium battery and solar panel), optional 1.14 inch TFT display and GPS module as accessories. Mesh Node has powerful long-distance communication capabilities, scalability, and low power design, which make it excellent in a wide range of application scenarios such as smart cities, agricultural monitoring, logistics tracking, etc. With Heltec nRF52 development environment and libraries , you can use it for LoRa/LoRaWAN development work, as well as to run some open source projects, such as Meshtastic.
Product Features
- MCU nRF52840 (Bluetooth), LoRa chipset SX1262.
- Low power consumption, 11 uA in deep sleep.
- Powerful display function (optional), onboard 1.14 inch TFT-LCD display contains 135(H)RGB x240(V) dots and can display up to 262k colors.
- Type-C USB interface with a complete voltage regulator, ESD protection, short circuit protection, RF shielding, and other protection measures.
- Various Interfaces (2*1.25mm LiPo connector, 2*1.25mm Solar panel connector, 8*1.25mm GNSS module connector) which greatly increase the extensibility of the board.
- Operation condition: -20 ~ 70℃, 90%RH(No condensing).
- Compatible with Arduino,and we provide Arduino development frameworks and libraries.
Pin Definition
Pin Map
Pin Definition
P1
| Name Type | Description |
| 5V P | 5V Power. |
| GND P | Ground. |
| 3V3 P | 3.3V Power. |
| GND P | Ground. |
| 0.13 I/O | GPIO13. |
| 0.16 I/O | GPIO14. |
| RST I/O | RESET. |
| 1.01 I/O GPIO33. |
| SWD I/O SWDIO. |
| SWC I/O SWCLK. |
| SWO I/O SWO. |
| 0.09 I/O GPIO9, UART1_RX. |
| 0.10 I/O GPIO10, UART1_TX. |
P2
| Name Type | Description |
| Ve P | 3V3 power. |
| GND P | Ground. |
| 0.08 I/O | GPIO8. |
| 0.07 I/O | GPIO7. |
| 1.12 I/O | GPIO44. |
| 1.14 I/O | GPIO46. |
| 0.05 I/O | GPIO37. |
| 1.15 I/O GPIO47. |
| 1.13 I/O GPIO45. |
| 0.31 I/O GPIO31. |
| 0.29 I/O GPIO29. |
| 0.30 I/O GPIO30. |
| 0.28 I/O GPIO28. |
Specifications
General Specification
Table3.1: General specification
| Parameters | Description |
| MCU | nRF52840 |
| LoRa Chipset | SX1262 |
| Memory | 1M ROM; 256KB SRAM |
| Bluetooth | Bluetooth 5, Bluetooth mesh, BLE. |
| Storage temperature | -30~80℃ |
| Operating temperature | -20~70℃ |
| Operating Humidity | 90%(No condensing) |
| Power Supply | 3~5.5V (USB), 3~4.2(Battery) |
| Display Module | LH114T-IF03 |
| Screen Size | 1.14 Inch |
| Display Resolution | 135RGB x 240 |
| Active Area | 22.7 mm(H) × 42.72(V) mm |
| Display Colors | 262K |
| Hardware Resource | USB 2.0, 2*RGB, 2*Button, 4*SPI, 2*TWI, 2*UART, 4*PWM, QPSI, I2S, PDM, QDEC Etc. |
| Interface | Type-C USB, 2*1.25 lithium battery connector, 2*1.25 solar panel connector, LoRa ANT (IPEX1.0), 8*1.25 GPS module connector, 2*13*2.54 Header Pin |
| Dimensions | 50.80mm x 22.86mm |
Power Consumption
Table 3.2: Working current
| Mode | Condition | Consumption(Battry@3.7V) | ||
| 470MHz | 868MHz | 915MHz | ||
| LoRa_TX | 5dBm | 83mA | 93mA | |
| 10dBm | 108mA | 122mA | ||
| 15dBm | 136mA | 151mA | ||
| 20dBm | 157mA | 164mA | ||
| BT | UART | 93mA | ||
| Scan | 2mA | |||
| Sleep | 11uA | |||
LoRa RF Characteristics
Transmit Power
Table3.3.1: Transmit power
| Operating frequency band | Maximum power value/[dBm] |
| 470~510 | 21 ± 1 |
| 863~870 | 21 ± 1 |
| 902~928 | 21 ± 1 |
Receiving Sensitivity
The following table gives typically sensitivity level.
Table3.3.2: Receiving sensitivity
| Signal Bandwidth/[KHz] | Spreading Factor | Sensitivity/[dBm] |
| 125 | SF12 | -135 |
| 125 | SF10 | -130 |
| 125 | SF7 | -124 |
Operation Frequencies
Mesh Node supports LoRaWAN frequency channels and models corresponding table.
Table3.3.3: Operation Frequencies
| Region | Frequency (MHz) | Model |
| EU433 | 433.175~434.665 | HT-n5262-LF |
| CN470 | 470~510 | HT-n5262-LF |
| IN868 | 865~867 | HT-n5262-HF |
| EU868 | 863~870 | HT-n5262-HF |
| US915 | 902~928 | HT-n5262-HF |
| AU915 | 915~928 | HT-n5262-HF |
| KR920 | 920~923 | HT-n5262-HF |
| AS923 | 920~925 | HT-n5262-HF |
Physical Dimensions
Resource
Develop framework and lib
- Heltec nRF52 framework and Lib
Recommendation server
- Heltec LoRaWAN test server based on TTS V3
- SnapEmu IoT Platform
Documents
- Mesh Node Manual Document
Schematic Diagram
- Schematic Diagram
Related Resource
- TFT-LCD Datasheet
Heltec Contact Information
Heltec Automation Technology Co., Ltd Chengdu, Sichuan, China
https://heltec.org
- Email: support@heltec.cn
- Phone: +86-028-62374838
- https://heltec.org
FCC Statement
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. 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 turning 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 receiving antenna.
- 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.
To assure continued compliance, any changes or modifications not expressly approved by the party. Responsible for compliance could void the user’s authority to operate this equipment. (Example- use only shielded interface cables when connecting to computer or peripheral devices).
This equipment complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
- This device may not cause harmful interference, and
- This device must accept any interference received, including interference that may cause undesired operation.
FCC Radiation Exposure Statement:
The equipment complies with FCC Radiation exposure limits set forth for uncontrolled enviroment. This equipment should be installed and operated with minimum distance 20cm between the radiator and your body.
Documents / Resources
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HELTEC HT-N5262 Mesh Node With Bluetooth And LoRa [pdf] Owner's Manual 2A2GJ-HT-N5262, 2A2GJHTN5262, HT-N5262 Mesh Node With Bluetooth And LoRa, HT-N5262, Mesh Node With Bluetooth And LoRa, Node With Bluetooth And LoRa, Bluetooth And LoRa, LoRa |
