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Description
Characteristics
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Description
Summary
Mesh Node T114 is a Low Power Consumption development board based on nRF52840 and SX1262 and supports LoRa and Bluetooth 5.0. which integrates various power interfaces (5V USB, lithium battery, and solar panel), an optional 1.14-inch TFT display, and a 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.
Mesh Node T114 has been upgraded to the 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.
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.
- 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.
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 |
| Electrical characteristics | Deep Sleep: ~11uA Tracker mode sleep: ~22uA GPS OFF, TFT OFF: ~9mA GPS OFF, TFT ON: ~20mA GPS ON, TFT ON: ~51mA |
| Display | onboard 1.14 inch TFT-LCD display |
Description
Pin Map
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Dimension
FAQ
The 2.4GHz antenna is a multilayer ceramic antenna for BlueTooth communications, it can’t be replaced.
- Arduino
- PlatformIO
In addition to Meshtastic support, we have also developed a complete LoRaWAN protocol in the nRF52 Arduino framework.
You can find this type of socket by search “SH1.25 x 2”.
The maximum capacity of the shell for carrying batteries is 42 * 28*11mm, and the default 3.7V lithium battery size is 40 * 25*10mm
Just download the screenless version firmware and enter the 123456 password.
5V~6.5V, it is recommended to connect solar panels with a voltage of around 5V.
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
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.
Docs & Resource
- [Docs] — User Manual
- [Resource] —Heltec nRF52 framework and Lib
- [Resource] —SnapEmu IoT Platform
- [Attachment] — V1.x Shematic diagram
- [Attachment] — V2.x Schematic diagram
- [Attachment] — Datasheet
- [Attachment] — TFT-LCD Datasheet
- [Resource] — Related Resources
Project
Packing list
The default packing list without selecting any accessories is as follows:
| Item | Quantity |
|---|---|
| Mesh Node T114 | x1 |
| LoRa Antenna | x1 |
| 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 |
Characteristics
| Weight | 35 g |
|---|---|
| Dimensions | 5.8 × 2.286 × 0.968 cm |
| LoRa Band | 433MHz, 470~510MHz, 863~870MHz, 902~928MHz |
| Need Display? | Yes, No |
| Need GPS? | Yes, No |
| Need Shell? | Yes, No |
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Mesh Node T114 (Rev. 2.0), nRF52840 + SX1262 LoRa Node +GPS, Meshtastic and LoRaWAN Compatible
What's this?
Widely welcomed nRF52840 + SX1262 LoRa Node, Meshtastic and LoRaWAN Compatible, with a 1.14-inch TFT display and GPS extension port.
Price range: $27.90 through $41.70
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