Heltec V3/V4 WiFi LoRa 32 868MHz Development Board With Dual Antenna Meshtastic Bluetooth For Meshcore Arduino PlatformIO

$139.59 $268.45

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Color 2PCS V4 dual antenna 2PCS V3 dual antenna V4 dual antenna V3 dual antenna

Package863-928MHz

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SPECIFICATIONS

Accessory Type: USB To DC Cable

Battery Included: no

Brand Name: Heltec Automation

Choice: yes

Compatible With: lora

High-concerned chemical: none

Origin: Mainland China

Typical Application Fields: Internet of Things (IoT)

semi_Choice: yes

If you don't know how to flash, please watch the following video

Note： Version 4.3

Please ensure your board enters Bootloader mode before flashing. Here’s how:

Connect the USB-C cable, then hold down the PRG button, press the RST button once, and release the PRG button. After that, flash the firmware. Once the flashing is complete, remember to restart the device.

Hardware version 4.3 requires new firmware.

If you are using Heltec’s development framework, please update the board package and LoRa library to the latest via GitHub.

Meshtastic, please use firmware version 2.7.20 or above. Please note: “Meshtastic UI” is for use with the touchscreen. For ordinary OLED screens, please do not select it.
MeshCore, please use firmware version 1.15.0 or above.

Specifications

Parameters	Description
MCU	ESP32-S3R2 (Xtensa®32-bit lx7 dual core processor)
LoRa Chip	SX1262
Frequency	High-power version: 863-928MHz Low-power version: 433, 470-510, 863-928MHz
Max. TX Power	High-power version: 28 ±1 dBm Low-power version: 21 ±1 dBm
Max. Receiving sensitivity	-137dBm@SF12 BW=125KHz
Wi-Fi	802.11 b/g/n, up to 150Mbps
Bluetooth	Bluetooth (LE), Bluetooth 5, Bluetooth Mesh
Hardware Resource	7ADC1 + 2ADC2; 7Touch; 3UART; 2I2C; 2SPI; etc.
Memory	384KB ROM; 512KB SRAM; 16KB RTC SRAM; 2MB PSRAM; 16MB Flash
Interface	Type-C USB; 1.252 Pin lithium battery interface; 1.252 Pin Solar interface; 1.25*8 Pin interface; LoRa ANT(IPEX1.0); 2.4G ANT(IPEX1.0)
Battery applicable	3.3-4.4V lithium battery
Operating Temperature	-20 ~ 70 ℃
Dimensions	51.7 * 25.4* 10.7mm

Layout

Pin Map

FAQ

1.“LoRa Error”

It does not indicate device damage. Please disregard this phenomenon. The LORA ERROR occurs because it is running the factory default LORA testing program and cannot find another device running the same program.

2.Failed to flash firmware or upload code.

Enter BootLoader mode: Connect the USB-C cable, hold down the PRG button, press the RST button once, then release the PRG button.
Replace a USB data cable.
Change the port on the computer.

3.Firmware for V4.3.

Hardware version 4.3 requires new firmware.

Schematic of V4.3, please consult customer service

If you are using Heltec’s development framework, please update the board package and LoRa library to the latest via GitHub.
Meshtastic, please use firmware version 2.7.20 or above.
MeshCore, please use firmware version 1.15.0 or above.

4.Enable or Disable LNA.

Note: The following content only applies to hardware V4.3 and above

Meshtastic 2.7.20: On the device, use the PRG button to navigate to “System” → “LoRa”, where you can choose to enable or disable LNA.
MeshCore 1.15.0: LNA is enabled by default and cannot be modified.
- You can download the firmware from this link, which has LNA disabled by default: The link cannot be displayed. Please consult customer service
- With the firmware from this link, LNA can be toggled via button long press: The link cannot be displayed. Please consult customer service
- We have submitted a PR. In the near future, official firmware will also support toggling LNA via command line or button.

5.The screen does not display.

Please note: “Meshtastic UI” is for use with the touchscreen. For ordinary OLED screens, please do not Select it.