Product Summary
Heltec Meshtastic Wifi LoRa 32 V4 ESP32 SX1262 GPS 0.96inch OLED Solar Powered Dev-Board is a development board selected for building connected devices, firmware tests and rapid electronics prototypes. It is suitable for makers, embedded developers and IoT prototyping teams who need practical electronics hardware for reliable project work.
Best For
- building connected devices, firmware tests and rapid electronics prototypes
- Arduino, MicroPython, sensors, displays and expansion modules
- Electronics testing, repair, prototyping and maker workflows
FAQ
Who is this product for? It is intended for makers, embedded developers and IoT prototyping teams.
What should I check before buying? Review the product options, specifications, included accessories and compatibility details on this page.
Summary
●More detailedWiFi LoRa 32(V4)introduction-Scan&Watch for more on
Youtube.
https://youtu.be/JRidd85Rm5U?si=RMP22rGAFhoh5dAM
Main Features
● Base on ESP32-S3R2 & SX-1262, supports Wi-Fi b/g/n, BLE, and LoRa communication.
● 2MB PSRAM and 16MB external Flash, more suitable for UI and complex system .
● High-power version with LoRa transmission power increased to 27±1dBm.
● Form factor and pin compatibility with WiFi LoRa 32 V3.
● PC casing protects the screen and integrates FPC 2.4G antenna.
● Added SH1.25-2P solar panel interface.
● Optimized lithium battery management.
● Added SH1.25-8Pin GNSS interface.
● USB Type-C interface with integrated voltage regulation, ESD protection, short-circuit protection,
and RF isolation design.
● Low power consumption is less than 20uA.
Compared to WiFi LoRa 32 V3 has made the following upgrades:
Docs & Resource
● User manual
https://docs.heltec.org/en/node/esp32/wifi_lora_32/index.html
●Heltec ESP(ESP32 &ESP8266) framework
https://github.com/Heltec-Aaron-Lee/WiFi_Kit_series
● Heltec ESP32 library
https://github.com/HelTecAutomation/Heltec_ESP32
● Schematic diagram
https://resource.heltec.download/WiFi_LoRa_32_V4/Schematic
● Downloadable resource
https://resource.heltec.download/WiFi_LoRa_32_V4
Pin Map
Specifications
Parameters |
Description |
MCU |
ESP32-S3R2 (Xtensa®32-bit lx7 dual core processor) |
LoRa Node Chip |
SX1262 |
Frequency |
High-power version: 863-928MHz |
Max. TX Powe |
High-power version: 28 ±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 |
7*ADC1 + 2*ADC2; |
Memory |
384KB ROM; 512KB SRAM; 16KB RTC SRAM; 2MB PSRAM; 16MB Flash |
Interface |
Type-C USB; |
Battery applicable |
3.3-4.4V lithium battery |
Operating Temperature |
-20 - 70 deg C |
Dimensions |
51.7 * 25.4* 10.7mm |
Packing List
The default packing list without selecting any accessories is as follows:
1.Standard configuration (with spring antenna)
2.Standard configuration+GPS module (with spring antenna)
FAQ
A1: The default 2.4G FPC antenna is located on the side of the plastic screen bracket.
If you wish to use an IPEX-connected 2.4G antenna, you need to remove the inductor marked as 1 in
the diagram below, and add a 0-ohm resistor (or other conductive metal or cable) at the position
marked 2 to connect to the IPEX interface.
A2:
●Arduino
●Micro Python
●Platform.io
●Espressif IDE
We strongly recommend using Arduino. We have complete technical support and provide complete
LoRaWAN code for ESP32 Arduino framework.
A3: You can find this type of socket by search "SH1.25 x 2".
A4: Of course, you can contact our sales staff and provide your ideas.
A5: They are compatible in most scenarios.
Since V4 uses the same series of chips as V3, features the same OLED, and has an almost
identical pin layout, V3 and V4 can be used interchangeably in the majority of cases.
However, due to the increased transmit power, the transmit power settings in some code may no
longer correspond directly to the actual output.
Q6: Failed to upload code
A6: Please try the following steps:
1.Try using a different USB cable.
2.Enter BootLoader mode. There are two methods to enter this mode:
●Hold down the PRG button, connect the USB-C cable, then release the PRG button.
●Connect the USB-C cable, hold down the PRG button, press the RST button once, then release
the PRG button.
