LILYGO T-Beam Supreme

ESP32-S3 and SX1262 board with GPS, 18650 holder and OLED. Runs Meshtastic, MeshCore and RNode. Max TX is not stated; the T-Beam 1W is over UK limits.

Specifications
Maker	LILYGO
MCU	ESP32-S3 (Wi-Fi and Bluetooth 5 LE)
LoRa radio	SX1262
Max TX power	Not stated on any page we read
GPS	u-blox NEO-M10S or Quectel L76K
Screen	1.3 inch OLED
Battery	One 18650 holder (unprotected flat-top cells only)
Sensors	BME280, QMI8658 IMU, QMC6310 magnetometer, PCF8563 RTC

What it is

The LILYGO T-Beam Supreme is an ESP32-S3 board with an SX1262 LoRa radio, a GPS receiver (NEO-M10S or L76K), a 1.3 inch OLED, an 18650 cell holder, and a set of sensors (BME280 environment sensor, QMI8658 IMU, QMC6310 magnetometer, PCF8563 clock). Meshtastic's current T-Beam page covers the S3-Core, the Supreme and the 1W; the older v0.7 to v1.2 boards are no longer documented there.

Who it suits

Best for: a GPS tracker or vehicle node with a swappable 18650, where you want a screen and onboard positioning.

Not for: protected or button-top 18650 cells longer than the holder takes. Not for the 1W variant in the UK (see the warning above). Not for the longest battery life: it is an ESP32 board.

UK 868 MHz notes

LILYGO sells the T-Beam Supreme in more than one frequency version. Buy the 868 MHz version, never 915 MHz. We did not confirm LILYGO's exact SKU code for it. See Buy the right frequency.

We found no stated maximum transmit power for the Supreme on any page we read, and we do not assume one. The arithmetic (ours) is:

e.r.p. (dBm) = conducted TX (dBm) + antenna gain (dBi) - 2.15 - cable loss (dB)

For the UK 500 mW e.r.p. limit in 869.40-869.65 MHz, the conducted power must be at most about 29.1 dBm minus antenna gain in dBi (27.1 dBm at 2 dBi). Any setting above roughly 16 dBm conducted at 0 dBi breaches the 25 mW sub-bands, so the radio must sit in the 869.40-869.65 MHz slot. Meshtastic's EU_868 region does (869.4-869.65 MHz, 10% duty cycle).

Limits are from Ofcom IR 2030 v1.16 (published 7 April 2026).

Firmware

Meshtastic: supported.
MeshCore: supported ("LilyGo T-Beam Supreme (SX1262)" in the flasher catalog; lilygo_tbeam_supreme_SX1262 in the repository; the SX1262 and SX1276 T-Beams and the 1W also have variants).
RNode / Reticulum: supported. The Reticulum manual lists the T-Beam Supreme, and RNode_Firmware has an 868 MHz model for it.

Flashing: Flash Meshtastic, Flash MeshCore, RNode and Reticulum setup.

Known quirks

The 18650 holder takes unprotected flat-top cells only. Protected or button-top cells longer than 65 mm do not fit.
SoftRF is preinstalled on the S3-Core board, so flash Meshtastic before use.
Attach the antenna before transmitting.

Power

No reliable current figure is published for this board that we could find. Measure your own node. Cell safety and power-bank notes are in Power.

Guides: Flash Meshtastic, Flash MeshCore, RNode and Reticulum setup, Power, Antenna placement
Tools: Link budget calculator, Solar node sizing
Other devices: LILYGO T-Echo, LILYGO T-Deck, Heltec Wireless Tracker
Comparison: Meshtastic vs MeshCore