Heltec ESP32 LoRa




In order to meet the user’s requirements for high performance and small size, we designed this product. On the basis of WiFi LoRa 32, it’s has a smaller size, 0.49″ OLED display and better RF characteristics.

​Over View

Wireless Stick is a part of the “Heltec LoRa“ series, with the following features:

CE Certificate;
2 Microprocessor: ESP32 (dual-core 32-bit MCU + ULP core), with LoRa node chip SX1276/SX1278;
3 Micro USB interface with complete voltage regulator, ESD protection, short circuit protection, RF shielding and other protection measures;
4 Onboard SH1.25-2 battery interface, integrated lithium battery management system (charge and discharge management, overcharge protection, battery power detection, USB / battery power automatic switching);
5 Integrated WiFi, LoRa, Bluetooth three network connections, on-board Wi-Fi, Bluetooth dedicated 2.4GHz metal 3D antenna, reserved IPEX (U.FL) interface for LoRa use;
6 On-board 0.49-inch 64*32 dot matrix OLED display, which can be used to display debugging information, battery power and other information;
7 Integrated CP2102 USB to serial port chip, convenient for program downloading, debugging information printing;
8 Support the Arduino development environment;

Supports the Arduino version of the ESP32 + LoRaWAN protocol routine provided by Heltec. This is a standard LoRaWAN protocol that can communicate with any gateway/base station running the LoRaWAN protocol (requires serial number activation, only the development of the company) The board is available, the serial number can be queried on this page);

10 With good RF circuit design and basic low-power design (sleep current ≤800uA), it is convenient for IoT application vendors to quickly verify solutions and deploy applications;


 Technical Parameters

Source parameter
MCU ESP32( 240MHz Tensilica LX6 dual-core + 1 ULP, 600 DMIPS, 520KB SRAM, Wi-Fi, dual mode Bluetooth)
LoRa chip SX1276
LoRa bands EU_433, CN_470_510, EU_863_870, US_902_928 four bands optional
LoRa maximum output power 18dB ± 2dB
Hardware resources UART x 3; SPI x 2; I2C x 2; I2S x 1
  12 – bits ADC; 8 – bits DAC
  29 general GPIO
Display 0.49 inch 64*32 OLED display
interface Micro USB x 1; LoRa antenna interface(IPEX) x 1
Size 50.2 x 25.5 x 9.74 mm
USB to UART Bridge CP2102
Battery Type 3.7V Lithium(SH1.25 x 2)
 Battery detection circuit  √
External device power control(Vext)
 Low power design  Deep Sleep 800uA