Wireless ESP32 Stick Lite SX1276 LoRaWAN Protocol WIFI BLE Module

“Heltec LoRa” product family already included follow options:

 

LoRa spread spectrum communication (node);

Battery powered;

Good RF circuit design and impedance matching.

Notes:

 

① – Type:

Dev-Board – Can be used directly;

Module – Only core function, need to cooperate with external PCB or circuit.

② – Lithium: All lithium battery socket for Heltec boards is SH1.25-2;

③ – Vext: 3.3V(500mA) output, for external devices (e.g. sensors) power supply, in deep sleep mode, Vext can be shut down via software;

④ – Low Power: Products’ low power design, of Whole Circuit, the measured data are the current of the system during deep sleep.

-Microprocessor: ESP32 (dual-core 32-bit MCU + ULP core + Internal 4MB FLASH), with LoRa node chip SX1276;

-Micro USB interface with a complete voltage regulator, ESD protection, short circuit protection, RF shielding, and other protection measures;

-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);

-Integrated WiFi, LoRa, Bluetooth three network connections, onboard Wi-Fi, Bluetooth dedicated 2.4GHz metal 3D antenna, reserved IPEX (U.FL) interface for LoRa;

-Integrated CP2102 USB to serial port chip, convenient for program downloading, debugging information printing;

-Support the Aduino development environment;

-(Exclusive) Supports the Aduino 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);

-With good RF circuit design and good low-power design (sleep current ≤ 30uA), it is convenient for IoT application vendors to quickly verify solution and deploy applications;

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	None
FLASH	4MB(32M-bits) SPI FLASH
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 30uA

Electrical characteristics	Condition	Minimum	Typical	Maximum
Power Supply	USB powered(≥500mA)	4.7V	5V	6V
	Lithium powered(≥250mA)	3.3V	3.7V	4.2V
	3.3V(pin)powered(≥150mA)	2.7V	3.3V	3.5V
	5V(pin)powered(≥500mA)	4.7V	5V	6V
Power consumption(mA)	WIFI scan	/	115mA	/
	WIFI AP	/	135mA	/
	LoRa 10dB emission	/	50mA	/
	LoRa 12dB emission	/	60mA	/
	LoRa 15dB emission	/	110mA	/
	LoRa 20dB emission	/	130mA	/
Output	3.3V pin output	/	/	500mA
	5V pin output (USB powered only)	/	Equal to the input current	/
	External device power control (Vext 3.3V)	/	/	350mA

Package includes:

1 x Wireless ESP32 Stick Lite

File support:

How to install Heltec ESP32 Aduino Development Environment: http://www.heltec.cn/wifi_kit_install/

Wireless Stick Lite Source code:
Heltec ESP(ESP32 & ESP8266) framework (the basic of Heltec ESP series products Aduino running environment): https://github.com/Heltec-Aaron-Lee/WiFi_Kit_series

Heltec ESP32 library (must work with Heltec ESP framework): https://github.com/HelTecAutomation/Heltec_ESP32

Heltec ESP32 LoRaWAN library (a standard LoRaWAN protocol library provide by Heltec Automation, need a license to active: http://www.heltec.cn/search/): https://github.com/HelTecAutomation/ESP32_LoRaWAN

Wireless Stick Lite Pin out Diagram: https://github.com/Heltec-Aaron-Lee/WiFi_Kit_series/blob/master/PinoutDiagram/Wireless_Stick_Lite.pdf

Summary of Common Problems: https://docs.heltec.cn/#/en/faq/heltec_esp_series_common_problem_summary

AutoCAD & 3D Drawing:
AutoCAD 2017 version drawing: https://docs.heltec.cn/download/Wireless_Stick_Lite.dwg

Solid Works 2014 Version 3D Drawing(For reference only, Wireless Stick Lite has the same shape and size compare with Wireless Stick, only less an OLED display): https://docs.heltec.cn/download/WirelessStick.zip

Interesting Applications by users: single-channel LoRa gateway solution: https://github.com/things4u/ESP-1ch-Gateway-v5.0