Description
Heltec Mesh Node T114 Rev 2.0
Mesh Node T114 has been upgraded to ReV2.0 version with the following changes made:
●The circuit board was changed from 4 layers to 6 layers so the RF part and the crystal oscillator part can obtain a more complete ground.
●The circuit was changed from lead-free to immersion gold process, which is more friendly to signal transmission.
●The position of some components was adjusted.
●The RF path was optimized according to the six-layer board structure.
●The direction of the 2.4GHz Bluetooth antenna and IPEX LoRa antenna interface was changed to make them farther away.
●The data transmission can sent long data packets on meshtastic.
The 433MHz currently produced by Heltec manufacturer is still V1.0, as the previous issue of not being able to send long characters did not occur in the 863MHZ/915MHz frequency band.
Introduction and Operation Video of T114 Rev2.0 Development Board
●If you want to know more about Heltec Mesh Node T114, please click on the text to watch the video on YouTube.
https://www.youtube.com/watch?v=Pp0g8h6NoVw
● Operation Video
https://www.youtube.com/watch?v=zxcX8b0hSMo&t=284s
Why do we need Maker series products?
Low Power Characteristcs
Summary
Mesh Node T114 is a development board based on nRF52840 and SX1262, supports LoRa and Bluetooth 5.0. It integrated a variety of power interfaces (5V USB, lithium battery and solar panel), optional 1.14 inch TFT display and GPS module as accessories, and has powerful long-distance communication capabilities, scalability, and low power design. With Heltec nRF52 development environment and libraries, you can use it for LoRa/LoRaWAN development work, and also use it to run some open source projects, such as Meshtastic.
Main Features
●MCU nRF52840 (Bluetooth), LoRa chipset SX1262.
●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.
●Low power consumption, 11 uA in deep sleep.
●Powerful display function, onboard 1.9-inch TFT-LCD display contains 170 (RGB)X320 dots and can display up to 262k colors.
●Operation condition: -20 ~ 70℃, 90%RH(No condensing).
●Type-C USB interface with a complete voltage regulator, ESD protection, short circuit protection, RF shielding, and other protection measures.
●Compatible with Arduino, we provide development frameworks and libraries.
●Various Interfaces: 1.25*2P LiPo connector, 1.25*2P Solar panel connector, 1.25*8P GNSS module connector, which greatly increase the extensibility of the board.
Docs & Resource
https://github.com/HelTecAutomation/Heltec_nRF52
●User Manual
https://docs.heltec.org/en/node/nrf/index.html?spm=a2g0o.detail.1000023.2.104e66Pf66Pfgt
● SnapEmu IoT Platform
https://platform.snapemu.com/user/login?spm=a2g0o.detail.1000023.4.104e66Pf66Pfgt
●Datasheet
https://resource.heltec.cn/download/Mesh_Node_T114/Datasheet%20.pdf
● Schematic diagram
https://resource.heltec.cn/download/Mesh_Node_T114/schematic_diagram.pdf
● TFT-LCD Datasheet
https://resource.heltec.cn/download/Mesh_Node_T114/1.14inch%20LH114T-IF03%20VER%20C.pdf
● Related Resources
https://resource.heltec.cn/download/Mesh_Node_T114
● Heltec nRF52 framework and Lib
Pin Map
Dimension
Specifications
Parameters |
Description |
MCU |
nRF52840 |
LoRa Node Chip |
SX1262 |
Frequency |
470~510MHz,;
863~870MHz;
902~928MHZ. |
Max. TX Power |
21±1dBm |
Max. Receiving sensitivity |
-135dBm@SF12 BW=125KHz |
Bluetooth |
Bluetooth LE: Bluetooth 5, Bluetooth mesh |
Hardware Resource |
USB 2.0, 4 * SPI, 2 * TWI, 2 * UART, 4 * PWM, QPSI, 12S, PDM, QDEC Etc. |
Memory |
1M ROM
256KB SRAM |
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 |
Battery |
3~4.2V battery power supply and charge. |
Operating Temperature |
-20 ~ 70 ℃ |
Dimensions |
50.80*22.86mm |
Low Power Consumption in Deep Sleep |
11uA |
Display |
onboard 1.14 inch TFT-LCD display |
Packing List
The default packing list without selecting any accessories is as follows:
Item |
Quantity |
Mesh Node T114 |
1 |
LoRa Antenna |
1 |
Sensor connection wire |
1 |
SH1.25 x 2 battery connector |
1 |
NOTE
1. If you choose the T114 without a screen, you need to connect the device to a computer and view the status and logs through the serial port.
2. How to use?
There are two pins, Dru and FRsT that bootloader will check upon reset/power:
●Double Reset Reset twice within 500 ms will enter DFU with Uf2 and CDc support (only works with nRF52840)
●DFU = LOw and FRST = HIGH : Enter bootloader with UF2 and CDC support
●DFU = LoW and FRST = Low : Enter bootloader with OTA, to upgrade with a mobile application such as Nordic nrfConnect/Toolbox
More info about Heltec products:
Company Overview
●Chengdu Heltec Automation Technology Co., Ltd. ( English abbreviation Heltec Automation).
●At present, The company's research and development and production include OLED dot matrix screen, electronic ink screen, IoT series products, LoRa supporting solutions and high-precision temperature controllers with automatic control algorithms as the core.
●At present, there is a strong technical research and development team, a scientific production and manufacturing platform and a strict quality management system.
Our Services& Strengths
Stable performance, cost-effective products, high-quality and superior service, our products have not only gained a good reputation in the country, but also received high-quality evaluation in France, Germany, Russia, the United States, South Korea and other countries.
1). Rigorous quality assurance system.
2). High level of service awareness.
3). High quality team.
4). Components use well-known brands.
5). Quick response customer program.
6). Self-owned processing plant, rapid production, equipped with automatic SMT placement machine, automatic screen printing machine and reflow oven.
