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Identify the board

Confirm you have a plain Heltec WiFi LoRa 32 V4, then pick that exact target in the MeshCore flasher.

On the board

Silkscreen / packaging should read WiFi LoRa 32 V4 (not V3 / Wireless Stick / T114).

Confirm with the chip

After the board is on USB (Prerequisites):

esptool --chip esp32s3 --port /dev/ttyACM0 chip-id

Connected to ESP32-S3 on /dev/ttyACM0:
Chip type:          ESP32-S3 (QFN56) (revision v0.2)
Features:           Wi-Fi, BT 5 (LE), Dual Core + LP Core, 240MHz, Embedded PSRAM 2MB (AP_3v3)
…

2MB PSRAM → plain Heltec v4. This desk board reported 2MB.

In the flasher

  1. Open meshcore.io/flasher in Chrome / Chromium / Edge.
  2. Filter for Heltec v4.
  3. Choose the plain Heltec v4 row — not Heltec v4 R8 or Heltec v4 + Expansion Kit (Touch).

MeshCore flasher filtered to Heltec v4

Use this Do not use for this guide
Heltec v4 Heltec v4 R8, Heltec v4 + Expansion Kit (Touch), Heltec v3, other makers

If your board is a different MeshCore target, stop and use the matching flasher entry instead of forcing these steps.

Next: Bootloader mode.