# Heltec Mesh Node T114 Rev. 2.0

> Assemble a Bluetooth-connected LoRa node with optional display and GPS.

- **Category:** Radio & mesh
- **Availability:** Listed by maker
- **Price:** From US$17.90 (at heltec.org), checked 2026-09-15
- **Good for:** Assemble a Bluetooth-connected LoRa node with optional display and GPS.
- **You'll need:** Correct regional antenna, power source and Meshtastic client.
- **Trade-off:** The display, GPS, battery and enclosure are package-dependent.
- **Page:** https://gadgets.sh/devices/heltec-mesh-node-t114/

## Where to buy

| Shop | Status | Link |
|---|---|---|
| Heltec | Orderable | https://heltec.org/project/mesh-node-t114/?utm_source=gadgets.sh&utm_medium=referral&utm_campaign=heltec-mesh-node-t114&utm_content=api |
| Amazon | Orderable | https://www.amazon.com/dp/B0DDLD3VG8?utm_source=gadgets.sh&utm_medium=referral&utm_campaign=heltec-mesh-node-t114&utm_content=api |

## Blueprint

**Schematics published.** Heltec publishes a schematic PDF, datasheet, and pin map for the Mesh Node T114; no editable PCB source is published.

### Design files

- schematic: [Mesh Node T114 schematic diagram (PDF)](https://resource.heltec.cn/download/Mesh_Node_T114/schematic_diagram.pdf) (PDF)
- datasheet: [Mesh Node T114 datasheet](https://resource.heltec.cn/download/Mesh_Node_T114/Datasheet.pdf) (PDF)
- pinout: [Mesh Node T114 pin map](https://resource.heltec.cn/download/Mesh_Node_T114/Mesh_node_t114_Pin_Map.png) (PNG)

### Source repositories

- [HelTecAutomation/HeltecWiKi](https://github.com/HelTecAutomation/HeltecWiKi) — docs, GPL-3.0, ★11

### Key parts

| Part | Role | Datasheet |
|---|---|---|
| Nordic nRF52840 | MCU/BLE radio | https://www.nordicsemi.com/Products/nRF52840 |
| Semtech SX1262 | LoRa radio | https://www.semtech.com/products/wireless-rf/lora-connect/sx1262 |

_Notes:_ All three files verified live (200) on resource.heltec.cn. Wiki (hardware_update_log) notes a Rev. 2.0 six-layer redesign; the linked schematic/datasheet are the current-revision files Heltec serves at that URL, no separate older-revision PDF was found.

## Specifications

### Controller and radio

| | |
|---|---|
| Controller | nRF52840; 1 MB program memory and 256 KB SRAM |
| LoRa | SX1262; high-band 863–928 MHz and low-band 470–510 MHz models documented |
| 433 MHz selection | Store also lists a 433 MHz option; confirm the selected radio/antenna variant |
| Radio performance claims | 21 ±1 dBm output; −135 dBm sensitivity at SF12 / 125 kHz |
| Phone radio | Bluetooth LE 5; onboard ceramic antenna |

### Display, accessories and power

| | |
|---|---|
| Display option | 1.14-inch TFT, 135 × 240 pixels, up to 262k colors |
| GNSS option | L76K accessory; eight-pin 1.25 mm connection |
| Connections | USB-C, LoRa IPEX and two 13-pin 2.54 mm headers |
| Battery input | 3–4.2 V lithium; two-pin SH1.25 socket |
| USB and solar | 5 V USB; solar range 5–6.5 V, maker recommends about 5 V |
| Solar socket | Two-pin SH1.25 |
| Maker current examples | 11 µA deep sleep; 22 µA tracker sleep; 9/20/51 mA for GPS/display off, display on, both on |
| Board size | 50.8 × 22.86 mm |
| Environment | Operating −20 to 70 °C; up to 90% RH non-condensing |
| Case battery space | Maker maximum: 42 × 28 × 11 mm |
| Base package | Board, LoRa antenna, two battery connectors and two 13-pin headers |
| Bundle-dependent parts | Display, L76K GNSS, case and antenna adapter vary by selection |

### Revision and firmware setup

| | |
|---|---|
| V2 radio revision | Six-layer redesign addresses long-packet transmission issues on early high-frequency boards |
| V2.1 power revision | Revises battery reverse-polarity protection and ADC standby circuitry |
| Upstream Meshtastic target | heltec-mesh-node-t114 at the pinned commit |
| Enter bootloader | Connect USB-C and double-press RST; the HT-n5262 drive appears |
| Firmware upload | Copy the matching UF2 to HT-n5262; the board restarts automatically |
| Development | Heltec nRF52 framework/libraries support Arduino and LoRa/LoRaWAN development |
| Other software listings | Maker also advertises PlatformIO and MeshCore |

## Firmware & community

- [Meshtastic Firmware for nRF52840](https://github.com/meshtastic/firmware) — Native Nordic nRF52840 build for Meshtastic, featuring ultra-low sleep current and BLE pairing.

## Documentation

- [Maker specifications and documentation](https://heltec.org/project/mesh-node-t114/)
- [Meshtastic supported hardware](https://meshtastic.org/docs/hardware/devices/)
- [Datasheet](https://resource.heltec.cn/download/Mesh_Node_T114/Datasheet.pdf)
- [Schematics and downloads](https://resource.heltec.cn/download/Mesh_Node_T114)
- [Maker report on early-board radio issue](https://github.com/meshtastic/firmware/issues/4723#issuecomment-2404889735)
- [T114 maker setup overview](https://wiki.heltec.org/docs/devices/open-source-hardware/nrf52840-series/mesh-node-t114/)
- [T114 hardware revision history](https://wiki.heltec.org/docs/devices/open-source-hardware/nrf52840-series/mesh-node-t114/hardware_update_log)
- [T114 UF2 upload instructions](https://wiki.heltec.org/docs/devices/open-source-hardware/nrf52840-series/mesh-node-t114/firmware_upload)
- [Pinned Meshtastic T114 build definition](https://github.com/meshtastic/firmware/blob/6d41e279f1f51bd59f687b9d441c1bf47b1594fc/variants/nrf52840/heltec_mesh_node_t114/platformio.ini)
- [Meshtastic firmware selector and web flasher](https://flasher.meshtastic.org/)
- [Official Meshtastic apps and firmware downloads](https://meshtastic.org/downloads/)

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Source: gadgets.sh · https://gadgets.sh/devices/heltec-mesh-node-t114/ · JSON: https://gadgets.sh/api/v1/devices/heltec-mesh-node-t114.json