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Green rectangular circuit board with gold pins and silver antenna connector

ARCTIC

ARCTIC 2 in 1 accessory 27dBm 16MB 137dBm 1262

SKU CH-SEFX-P7362

ESP32-S3 LoRa board with 27 dBm output, 16 MB flash and SX1262 chip for Meshtastic and IoT projects

  • ESP32-S3R2 chip with 16MB flash powers complex IoT projects
  • 27dBm transmission power reaches distant LoRa nodes reliably
  • 137dBm sensitivity captures weak signals across large areas
  • SX1262 radio enables long-range Meshtastic communication
  • Unsoldered headers allow custom pinout for compact builds

ESP32-S3 LoRa development board

This Heltec V4 board combines an ESP32-S3R2 microcontroller with an SX1262 LoRa transceiver for long-range wireless projects. It provides 2 MB PSRAM and 16 MB flash memory for firmware and data storage. Pin headers are not soldered, allowing custom connection layouts. The module targets developers building Meshtastic nodes or LoRaWAN endpoints.

Suited for Meshtastic and custom LoRa networks

Developers who need high transmit power and deep receive sensitivity for wide-area sensor networks will benefit from this hardware. Projects requiring an on-board display or pre-assembled connectors should consider other options. The unsoldered header format adds a soldering step before use.

27 dBm transmit power and -137 dBm sensitivity

These radio parameters set the practical communication range for Meshtastic and LoRaWAN deployments. The SX1262 chip delivers this performance across sub-GHz bands. Matching antenna choice and regional duty-cycle rules to these figures determines whether the link budget meets a specific project's needs.

Highlights

  • ESP32-S3R2 chip with 16MB flash powers complex IoT projects
  • 27dBm transmission power reaches distant LoRa nodes reliably
  • 137dBm sensitivity captures weak signals across large areas
  • SX1262 radio enables long-range Meshtastic communication
  • Unsoldered headers allow custom pinout for compact builds

Specifications

No published specifications for this item yet.

Questions about this item

What antenna connector does the SX1262 radio use for the 27 dBm output?

The board provides a U.FL connector for an external antenna matched to the 27 dBm LoRa transmitter.

Which pins must be soldered first to flash the ESP32-S3R2 before the headers go on?

Solder the USB-C, BOOT and RESET pads first; they give serial access to load firmware before the unsoldered header rows are populated.

How is the 16 MB flash memory affected when the board runs continuously at 27 dBm transmit power?

The 16 MB flash is rated for standard write cycles; sustained high-power RF does not degrade its endurance, so no scheduled replacement is needed.

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