Heltec WiFi LoRa 32 V4.3.1 ESP32 S3R8 LoRa Node 8MB PSRAM Compatible With Meshtastic Meshcore and LoRaWAN

Heltec WiFi LoRa 32 V4.3.1 ESP32 S3R8 LoRa Node 8MB PSRAM Compatible With Meshtastic Meshcore and LoRaWAN

$146.96

$146.96 $0.00

Color 863-928MHz NO GPS 863-928MHz NO GPS 1 863-928MHz GPS 863-928MHz GPS 1

Description

SPECIFICATIONS

Battery applicable: 3.3-4.4V lithium battery

Bluetooth: Bluetooth (LE), Bluetooth 5, Bluetooth Mesh

Brand Name: Meshzeno

Dimensions: 51.7 * 25.4* 10.7mm

Frequency: 863-928MHz

High-concerned chemical: none

LoRa Chip: SX1262

MCU: ESP32-S3R8

Memory: 384KB ROM; 512KB SRAM; 16KB RTC SRAM; 2 / 8MB PSRAM; 16MB Flash

Model: R8-V4

Origin: Mainland China

Type: ESP Series

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

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 S3R8
LoRa Chip	SX1262
Frequency	High-power version: 863-928MHz Low-power version: 433-510MHz
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

Pin Map

Main Change	WiFi LoRa 32 V4	WiFi LoRa 32 V4-R8
Vext_Ctrl	GPIO36	GPIO40
VGNSS_Ctrl	GPIO34	GPIO42
LED	GPIO35	GPIO46
PA_CTX	Unbroken-out	GPIO5
GNSS_RST	GPIO42	Removed
ADC_Ctrl	GPIO37	Removed

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.