The `!Heltec WiFi LoRa 32 V4`!, more commonly known as the `!Heltec V4`!, is a development board based around the ESP32-S3 microcontroller and the SX1262 LoRa transceiver. It features a 505 mW increase in output power over its predecessor, the `F0af`_`[Heltec V3`:/page/wiki.mu`path=Heltec_V3]`_`f, along with additional memory and a solar panel connector.

>>Contents

• `F0af`_`[Models`#models]`_`f

• `F0af`_`[Firmware`#firmware]`_`f

• `F0af`_`[References`#references]`_`f

• `F0af`_`[External links`#external-links]`_`f

>>Models

There are two models of the Heltec V4. The `*HTIT-WB32LAF`* is the original model and features the ESP32-S3R2 microcontroller with 2 MB of PSRAM. The newer `*HTIT-WBR8H`* features the ESP32-S3R8 microcontroller with 8 MB of PSRAM. This newer model is also known as the Heltec V4-R8, and was likely introduced due to the ESP32-S3R2 becoming end-of-life.

>>Firmware

The Heltec V4 is supported by the official `F0af`_`[RNode`:/page/wiki.mu`path=RNode]`_`f firmware as of version 1.84.`:cite-ref-1[`F5bf`_`[1`#cite-note-1]`_`f] It is also supported by the `F0af`_`[microReticulum`:/page/wiki.mu`path=MicroReticulum]`_`f firmware as of version 1.85.10.`:cite-ref-2[`F5bf`_`[2`#cite-note-2]`_`f]

>>References

`:cite-note-1`!1.`! `F0af`_`[↑`#cite-ref-1]`_`f "Release 1.84".

`:cite-note-2`!2.`! `F0af`_`[↑`#cite-ref-2]`_`f "Release 1.85.10".

>>External links

• Official website

• WiFi LoRa 32 V4 datasheet

• WiFi LoRa 32 V4-R8 datasheet

>>Heltec WiFi LoRa 32 V4

`!Also known as:`! Heltec V4

`!Manufacturer:`! Heltec Automation

`!Type:`! Development board

`!Price:`! US$17.90

`!MCU:`! ESP32-S3R2 or S3R8

`!CPU:`! Xtensa LX7 @ 240 MHz

`!Memory:`! 512 kB SRAM 2 or 8 MB PSRAM 16 MB Flash

`!Display:`! 0.96-inch OLED 128 × 64 px

`!GNSS:`! External L76K

`!Power source:`! 5 V USB Type-C 3.7 V Li-ion Battery 6 V Solar Panel

`!Dimensions:`! 51.7 × 25.4 × 10.7 mm

`!Predecessor:`! `F0af`_`[Heltec WiFi LoRa 32 V3`:/page/wiki.mu`path=Heltec_WiFi_LoRa_32_V3]`_`f

>>>Bluetooth LE

`!Transceiver IC:`! ESP32-S3R2 or S3R8

`!PHY modes:`! 2M, Coded

`!Output power:`! 20 dBm (100 mW)

`!Sensitivity:`! -98 dBm @ 1 Mbps

`!Antenna type:`! Shared FPC Shared External u.FL

>>>2.4 GHz Wi-Fi

`!Transceiver IC:`! ESP32-S3R2 or S3R8

`!PHY modes:`! IEEE 802.11b/g/n

`!Output power:`! 21 dBm (125 mW)

`!Sensitivity:`! -98 dBm @ 1 Mbps

`!Antenna type:`! Shared FPC Shared External u.FL

>>>Sub-GHz LoRa

`!Transceiver IC:`! SX1262

`!PHY modes:`! FSK, LoRa, LR-FHSS

`!Frequency range:`! 863–928 MHz

`!Output power:`! 28 dBm (630 mW)

`!Antenna type:`! External u.FL