The Heltec Mesh Node T114 433MHz is a low-power development board suitable for LoRa communication projects, mesh networks, IoT, telemetry, remote sensors and experimental applications compatible with Meshtastic, MeshCore and LoRaWAN.

The board combines the nRF52840 microcontroller, with Bluetooth 5.0 / BLE support, and the SX1262 LoRa chipset, providing an efficient platform for long-range, low-power communication projects.

This version operates in the 433MHz band and is suitable for projects using this frequency range. Heltec’s datasheet lists EU433 operation from 433.175 to 434.665MHz, and use must always comply with the applicable regulations and limits in the country of operation.

The Mesh Node T114 provides several power and expansion options, including USB-C, lithium battery connector, solar panel connector, GNSS module connector and 2x13 2.54mm expansion headers.

Thanks to its low-power design, with deep sleep current listed at approximately 11uA, it is suitable for battery-powered LoRa nodes, portable devices, remote sensors, trackers and experimental stations.

This reference corresponds to the board-only version, supplied without display, without enclosure and without GPS/GNSS module. These accessories may be purchased separately when available.

Main features

LoRa / Mesh development board
Brand: Heltec
Model: Mesh Node T114
Frequency: 433MHz
Heltec listed region: EU433
Listed EU433 range: 433.175 to 434.665MHz
MCU: nRF52840
LoRa chipset: SX1262
Bluetooth: Bluetooth 5.0 / BLE / Bluetooth Mesh
Project compatibility: Meshtastic, MeshCore and LoRaWAN
Development environments: Heltec nRF52, Arduino and Heltec libraries
ROM memory: 1M
SRAM: 256KB
Listed maximum TX power: 21±1dBm
Listed maximum RX sensitivity: -135dBm at SF12, BW 125kHz
Deep sleep current: approx. 11uA
Tracker mode sleep current: approx. 22uA
GPS OFF and TFT OFF current: approx. 9mA
USB power supply: 3 to 5.5V via USB
Battery power supply: 3 to 4.2V
USB connector: USB-C
Battery connector: SH1.25 x 2 for lithium battery
Solar panel connector: SH1.25 x 2
LoRa antenna connector: IPEX1.0
GNSS connector: 8-pin 1.25mm connector for optional GNSS module
Expansion headers: 2x13 pins, 2.54mm pitch
Hardware interfaces: USB 2.0, SPI, TWI/I2C, UART, PWM, QSPI, I2S, PDM, QDEC and others
Operating temperature: -20°C to 70°C
Operating humidity: up to 90 percent, non-condensing
Board dimensions: 50.80 x 22.86mm
Display: not included in this version
GPS / GNSS: not included in this version
Enclosure: not included in this version
Main application: LoRa development, mesh networks and low-power IoT projects

Listed contents

1 Heltec Mesh Node T114 433MHz board
1 LoRa antenna
2 SH1.25 x 2 battery connectors
2 2x13 2.54mm header pin strips

Recommended applications

Meshtastic projects on 433MHz
MeshCore projects on 433MHz
LoRa and LoRaWAN development
Experimental mesh networks
Low-power LoRa nodes
Battery-powered remote sensors
IoT telemetry and monitoring
Solar panel and LiPo battery projects
Trackers with optional GNSS module
nRF52840 and SX1262 prototyping
Maker, laboratory, education and radio experimentation projects

Important note

Before use, always confirm the correct frequency, required firmware, suitable 433MHz antenna, applicable regulations, configured output power, battery type, connector polarity, GNSS module compatibility and need for enclosure or mechanical protection.

Do not power or transmit with the device without the LoRa antenna properly connected. Operation without an antenna may cause high VSWR, reduce range and damage the RF stage of the LoRa chipset.

This version is an open-board device, without enclosure. Avoid contact with metallic or conductive surfaces while powered.

This item corresponds only to the Heltec Mesh Node T114 433MHz kit without display, without GPS and without enclosure. Battery, solar panel, GNSS module, enclosure, USB cable, external programmer and other accessories are not included unless expressly stated otherwise.