Note: 433MHz is still the V1 version

863MHz apply to 863-928MHz,470MHz apply to 470-510MHz

433MHzhas been tested and there are no issues with use, it is still the V1 version. 868MHz and 915MHz are V2 versions.

packing list:The package list includes antennas by default. Option with a case is equipped with a glue rod antenna , while option without a cas is equipped with a spring antenna

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 that both 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.

Now the high-frequency Mesh node T114 can stably send long data packets in the “Long_Fast” channel of Meshtastic.

Product sellpoints:

Pre-flashed with Meshtastic firmware,Precise GNSS Mudule and Streamlined Case available.

Nordic NRF52840 Chip inside with advanced Bluetooth 5 as the multi protocol SoC for LoRaWAN Thread and Zigbee.

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.

SX1262 wireless transceiver module is designed with Semtech SX1262 RF transceiver chip, optimized LoRa spread spectrum communication technology, with strong anti-interference and confidentiality, can realize remote wireless data transmission and reception

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.

• 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.

Mesh Node T114 :

Mesh Node T114 is a Low Power Consumption development board based on nRF52840 and SX1262, supports LoRa and Bluetooth 5.0 . which integrated various 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.

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.

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.

The maximum capacity of the shell for carrying batteries is 42 * 28mm, and the default 3.7V lithium battery size is 41 * 24mm

the onboard 2.4GHz antenna is a multilayer ceramic antenna for BlueTooth communications, it can’t be replaced.

development methods
:

Arduino

PlatformIO
In

addition to Meshtastic support, we have also developed a complete LoRaWAN protocol in the nRF52 Arduino framework.

Pin Map

Dimension
:

packing list:

Mesh Node T114 x1

LoRa Antenna x1(The default is a spring antenna, the option with a case is a glue rod antenna)

SH1.25×2 Battery Connector x2

2.54 *13 Header Pin x2

L76K GNSS (Available when GPS selected) x1

Protect Shell and Transfer LoRa antenna (Available when Shell selected) x1

FAQ

Can the onboard 2.4GHz antenna be replaced?
The 2.4GHz antenna is a multilayer ceramic antenna for BlueTooth communications, it can’t be replaced.

What development methods does it support?
Arduino
PlatformIO
In addition to Meshtastic support, we have also developed a complete LoRaWAN protocol in the nRF52 Arduino framework.

What’s the battery socket type?
You can find this type of socket by search “SH1.25 x 2”.

What is the maximum size of battery supported by the default casing?
The maximum capacity of the shell for carrying batteries is 42 * 28mm, and the default 3.7V lithium battery size is 41 * 24mm

How to enter meshtastic on the screenless version of mesh node 114?
Just download the screenless version firmware and enter the 123456 password.

What is the acceptable battery range for the solar panel connected to mesh node 114?
5V~6.5V, it is recommended to connect solar panels with a voltage of around 5V.

Regarding the long chars send issue
Not time ago, customer reports that some of the Mesh Node T114 works as a Meshtastic device and tries to send long strings (>50 chars) ONLY in Long-Fast mode (SF11, 250K BW), sometimes sending messages may fail.

For a detailed description of this matter, please refer to this link:
https://github.com/meshtastic/firmware/issues/4723#issuecomment-2369336696

For a detailed report, Heltec solution, and compensation regarding this matter, please refer to this link
https://github.com/meshtastic/firmware/issues/4723#issuecomment-2404889735

Does 433MHz and 470MHz version has long chars sending issue?
With our detailed and long time testing, there is NO issue with long packet transmission in versions 433MHz and 470MHz, so they are not included in the compensation list.
But in response to users’ demand for the 433 and 470 hardware V2 versions, our engineers are debugging the corresponding hardware. It will be released soon.