Heltec V4
Official Active
Heltec Automation ESP32-S3R2 + SX1262 successor to Heltec V3 with 16 MB flash, 2 MB PSRAM, and up to 28 dBm LoRa TX power. Same 0.96-inch OLED and largely V3-compatible pinout, plus solar input, optional GNSS header, and built-in 2.4 GHz FPC antenna. Native USB-C (no CP2102). Widely used for Meshtastic and MeshCore.
~$18 approx.· 2026-06
References: mesh-sn.de ↗
- MCU
- ESP32-S3
- Radio
- SX1262
- Display
- 0.96″ OLED
- GPS
- None
- Battery
- External
- Connectivity
- USB, BLE, Wi-Fi
Roles
CompanionRepeaterRoom ServerStandalone Ui
Transports
bleusb
Other variants
Compare all 4 →
Hardware
Radio
- Technology
- LORA
- Chip
- Semtech SX1262 ↗
- Frequency
- 433 MHz,470 MHz,868 MHz,915 MHz
- TX power
- 28 dBm
- TX efficiency
- 5.26 mW/mA
- Antenna
- IPEX-1.0
Processor
- Family
- Espressif ESP32 series ↗
- Model
- Espressif ESP32-S3 ↗
- Architecture
- Xtensa LX
- Flash
- 16 MB
- RAM
- 2048 KB
- PSRAM
- 2 MB
Battery
- Battery
- External connector
- Chemistry
- LiPo
- Built-in
- No
- Charging
- Yes
- Connector
- SH1.25-2
Solar
- Solar charging
- Supported
Expansion
- Port 1
- Header 2.54 ×2 · 18 pins
- Port 2
- Header 2.54 ×2 · 2 pins
- Port 3
- Gnss 1.25 8 · 8 pins
Physical
Connectivity
- USB
- USB-C
- USB modes
- Power, Serial, Flashing
- Bluetooth
- BLE 5.0
- Wi-Fi
- 802.11 b/g/n
Firmware support
| Firmware | Type | Target | Status | Notes |
|---|---|---|---|---|
| MeshCore (Official) | Official | heltec_v4 | ✓ Supported | |
| EastMesh | Fork | — | ✓ Supported | |
| EasySkyMesh | Fork | — | ✓ Supported | |
| Meck | Fork | — | ✓ Supported | Remote repeater only. |
| Meshcomod | Fork | — | ✓ Supported | |
| MeshCore Low-Power | Fork | — | ✓ Supported | |
| MeshCoreNG | Fork | heltec_v4 | ✓ Supported | |
| MeshCoreTerm | Fork | — | ✓ Supported | |
| Offband Mesh | Fork | — | ✓ Supported | |
| Wadamesh | Fork | — | ✓ Supported | |
| ZephCore | Custom | — | ✓ Supported |