2PCS Heltec V4 LoRa32 ESP32-S3 SX1262 LoRaWAN 868MHz Development Board With 0.96 Inch OLED WiFi & BLE Mesh Network for IoT

2PCS Heltec V4 LoRa32 ESP32-S3 SX1262 LoRaWAN 868MHz Development Board With 0.96 Inch OLED WiFi & BLE Mesh Network for IoT

$203.20

$203.20 $0.00

Color With Glue Ant Spring Ant And GPS Glue Ant And GPS With Spring Ant

Package2PCS 863-928Mhz

Ships FromChina Mainland

Description

SPECIFICATIONS

Battery Included: no

Bluetooth: Bluetooth LE, Bluetooth 5, Bluetooth mesh

Brand Name: Meshzeno

Choice: yes

Dimensions: 51.7 * 25.4* 10.7mm

Frequency: 433~510 MHz, 863~928 MHz

High-concerned chemical: none

LoRa Chip: SX-1262

Master Chip: ESP32-S3R2

Max. Receiving Sensitivity: -137 dBm

Max. TX Power: 21±1dBm, 27±1 dBm

Model Number: LoRa 32 V4

OLED: SSD1315(0.96Inch, 128*64 resolution)

Operating Temperature: -40~85℃(OLED operating temperature: -40~ 70°C)

Origin: Mainland China

Power Supply: 5V@USB, 3.3-4.2V@Battery

Typical Application Fields: Internet of Things (IoT)

Wi-Fi: 802.11 b/g/n, up to 150Mbps

semi_Choice: yes

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

Packing List

Item	Quantity
WiFi LoRa 32 (V4)	x1
LoRa Antenna	x1
1.25×2 Connector (for battery&solar)	x2
2.54*18 Header Pin	x2
2.54*2 Header Pin	x2

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.

6.Why are there no resistors soldered on the 868 and 915 markings? Which frequency band does my device actually support?

It indicates simultaneous support for both 868 MHz and 915 MHz frequency bands.

In the initial design, we developed two separate hardware versions to achieve optimal RF performance. However, through subsequent debugging, we have successfully unified the hardware for both 868 MHz and 915 MHz while maintaining excellent RF characteristics.

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