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The Heltec WiFi LoRa 32 V3, more commonly known as the Heltec V3, is a development board based around the ESP32-S3 microcontroller and the SX1262 LoRa transceiver. It features a 45 mW increase in output power over its predecessor, the Heltec V2, along with the addition of a TCXO.

• Models

• Firmware

• References

• External links

There are two models of the Heltec V3. The HF operates on frequencies between 863 and 928 MHz, while the LF operates on the lower-frequency 433 and 470 MHz band.

The Heltec V3 is supported by the official RNode firmware as of version 1.71.cite-ref-1[1] It is also supported by the microReticulum firmware as of version 1.72.1.cite-ref-2[2]

cite-note-11. ↑ "Release 1.71".

cite-note-22. ↑ "Release 1.72.1".

• Official website

• Datasheet

Also known as: Heltec V3

Manufacturer: Heltec Automation

Type: Development board

Price: US$17.90

MCU: ESP32-S3FN8

CPU: Xtensa LX7 @ 240 MHz

Memory: 512 kB SRAM 8 MB Flash

Display: 0.96-inch OLED 128 × 64 px

Power source: 5 V USB Type-C 3.7 V Li-ion Battery

Dimensions: 50.2 × 25.5 × 10.2 mm

Predecessor: Heltec WiFi LoRa 32 V2

Successor: Heltec WiFi LoRa 32 V4

Transceiver IC: ESP32-S3FN8

PHY modes: 2M, Coded

Output power: 20 dBm (100 mW)

Sensitivity: -98 dBm @ 1 Mbps

Antenna type: Shared Spring

Transceiver IC: ESP32-S3FN8

PHY modes: IEEE 802.11b/g/n

Output power: 21 dBm (125 mW)

Sensitivity: -98 dBm @ 1 Mbps

Antenna type: Shared Spring

Transceiver IC: SX1262

PHY modes: FSK, LoRa, LR-FHSS

Frequency range: 433–510 MHz or 863–928 MHz

Output power: 21 dBm (125 mW)

Sensitivity: -137 dBm @ SF12 BW 125 KHz

Antenna type: External u.FL