The Mesh Node T114 is a compact, energy-efficient board designed for IoT innovators who need both long-range LoRa communication and Bluetooth 5.0 wireless. Powered by Nordic’s nRF52840 MCU together with the Semtech SX1262 transceiver, it strikes a balance between connectivity, low power consumption, and flexibility, making it an ideal hardware platform for Meshtastic Node and LoRaWAN projects.

Engineered with multiple power inputs — USB-C (5V), Li-ion battery, and solar panel support — the T114 is suitable for both indoor projects and outdoor deployments. Developers can choose the version with a 1.14-inch TFT display for enhanced interaction, or the screenless edition for ultra-low power scenarios. A dedicated GNSS connector also allows simple GPS integration.

With full support for Arduino IDE, PlatformIO, Meshtastic Node, and LoRaWAN, the board is not only developer-friendly but also ready for production-level IoT solutions.

What’s New in Revision 2.0

• 6-Layer RF Optimized PCB – Upgraded from 4 layers, providing a cleaner ground reference for both RF and clock circuits.
• ENIG Surface Process – Improves electrical performance and long-term reliability.
• Refined Component Placement – RF traces and critical parts were repositioned for higher efficiency.
• Better Antenna Isolation – Adjusted the orientation of the 2.4GHz BLE antenna and the IPEX LoRa port to reduce interference.
• Reliable Long Packet Delivery – Stable support for long messages in Meshtastic Node’s Long_Fast channel (SF11, 250 kHz BW).

Features

• Dual Wireless: LoRa via SX1262 + Bluetooth 5.0 via nRF52840.
• Optional TFT Display: 1.14″ LCD, 135×240 pixels, 262k colors.
• Power Saver: ~11 µA in deep sleep; ~23 µA in Meshtastic Node low-power mode.
• Ruggedized Design: USB-C with ESD protection, short-circuit safeguards, and RF shielding.
• Wide Environment Tolerance: Works from –20°C to +70°C, humidity up to 90% (non-condensing).
• Expansion Ready: Solar input, LiPo connector (SH1.25×2), GNSS port (SH1.25×8).

Why Choose the T114

• Flexibility First – Multiple power supply choices, screen option, GPS add-on.
• Ultra-Low Standby Current – Perfect for long-term, battery-powered Meshtastic Node applications.
• Strong Communication Mix – BLE for short-range + LoRa for miles-long links.
• Developer Friendly – Supported in Arduino/PlatformIO with ready-to-use Heltec frameworks, optimized for Meshtastic Node projects.
• Protective Hardware Design – Transparent support layer under the display prevents damage and improves cooling.

FAQ

• Can the BLE antenna be swapped out?
  No. The 2.4 GHz Bluetooth antenna is a fixed multilayer ceramic type.
• Which development platforms are supported?
  Arduino IDE and PlatformIO are fully compatible. Both Meshtastic and a complete LoRaWAN protocol stack are available.
• What kind of battery connector is used?
  Standard SH1.25 × 2.
• How large a battery fits inside the enclosure?
  Maximum supported dimensions: 42 × 28 × 11 mm. The default battery is 40 × 25 × 10 mm.
• How do I use Meshtastic on the version without a display?
  Flash the screenless firmware build and use the default password 123456.
• What solar panel voltage is recommended?
  The input range is 5V–6.5V, with 5V panels being ideal.
• Is there a known issue with long messages?
  Earlier boards sometimes failed when sending >50-character strings in Long_Fast mode. Rev 2.0 hardware resolves this problem.
  👉 Issue Report
  👉 Heltec’s Fix & Compensation Plan
• Does the same problem occur on 433 MHz or 470 MHz versions?
  No. Long-packet stability has been verified on both 433 and 470 MHz models. Hardware Rev 2.0 versions for these bands are currently under development.