Heltec, low-power node board

Heltec Mesh Node T114

Name: Heltec Mesh Node T114
Brand: Heltec

A small nRF52840 board with an optional 1.14-inch color screen, solar and battery connectors, and very low sleep current. A favorite base for DIY solar nodes.

Manufacturer specs only Paid link: Amazon Meshtastic MeshCore

Best for

Builders making a solar or battery node that should run for a long time.

Photo pending: we only show images we own or are licensed to use.

Strengths

About 11 µA deep sleep per Heltec's Rev. 2.0 spec table.
Solar (about 5 V) and LiPo connectors on board.
MeshCore FAQ names the T114.

Limitations

IPEX 1.0 antenna connector.
Older revisions exist; Heltec's current board is Rev. 2.0. Check the listing says V2 or Rev. 2.0.
Max transmit power 21 dBm, below some other boards.

What it does not do

Arrive as a finished radio: you add battery, case and antenna.
Include GPS: it is an optional module.

Specifications

From the cited source on 2026-10-27. "Not verified" means no source we checked published it.

MCU / radio	nRF52840 / SX1262^[1]
Max TX power	21 ±1 dBm^[1]
Frequency options	470-510, 863-870, 902-928 MHz^[1]
Display	Optional 1.14 in TFT-LCD (chosen at purchase)^[1]
Connectors	LiPo 2-pin 1.25 mm; solar 2-pin 1.25 mm; GNSS 8-pin^[1]
Deep sleep	About 11 µA^[1]
Antenna connector	IPEX 1.0^[1]
Size	50.80 x 22.86 mm^[1]

Compatibility

Check	Status	Basis
Meshtastic	Documented: documented	Heltec states Meshtastic support; documented by Meshtastic.
MeshCore	Documented: documented	MeshCore FAQ lists the Heltec T114.
Frequency	902 to 928 MHz option for US	US LoRa operation uses the 902 to 928 MHz band. Set the region in firmware.
Role	companion, repeater	Usually paired with a phone or computer app.

"Documented" means the maker or project publishes support for this model. It does not mean we tested it. How we rate compatibility.

MeshCore and Meshtastic are separate firmware and network systems. Check the exact hardware model, firmware, regional radio setting and local coverage before buying. These low-data-rate systems do not replace emergency services or broadband.

Operate radio equipment within your local frequency, power and equipment-authorization rules. Firmware compatibility is not regulatory approval.

Before you buy

Use a pigtail to a panel-mount SMA for anything mounted outdoors.

Sources

Mesh Node T114 (Rev. 2.0), Heltec Automation (manufacturer), read 2026-10-27. Rev. 1.0 page retired. Specs re-checked against the Rev. 2.0 table 2026-10-27: MCU, radio, TX power, bands, connectors, deep sleep and size unchanged; display optional at purchase; 135 x 240 resolution no longer stated.
MeshCore FAQ, MeshCore (project), read 2026-10-26. Web flasher flasher.meshcore.io; roles BLE/USB companion, repeater, room server; USA/Canada recommended preset 910.525 MHz, SF7, BW62.5, CR5; default public channel key published; repeater default admin password "password" (change it); repeaters flood an advert every 12 hours by default; place repeaters high. T-Deck unlock fee.

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