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Heltec Wireless Stick(V3)

Схема соответствует действительности, по схеме можно определить подключение периферийных устройств 


Инициализация дисплея: 
библиотека  https://github.com/ThingPulse/esp8266-oled-ssd1306.git 
#include "SSD1306Wire.h" 
#define RST_OLED 21 
#define SCL_OLED 18 
#define SDA_OLED 17 
SSD1306Wire display(0x3c, SDA_OLED, SCL_OLED, GEOMETRY_64_32); 
 pinMode(RST_OLED, OUTPUT); 
 digitalWrite(RST_OLED, HIGH); 
 digitalWrite(RST_OLED, LOW); 
 digitalWrite(RST_OLED, HIGH); 
 // Set display contrast 
 // really low brightness & contrast: contrast = 10, precharge = 5, comdetect = 0 
 // normal brightness & contrast:  contrast = 100 
 // display.displayOff();


Инициализация радио модуля: 
библиотека https://github.com/jgromes/RadioLib.git 
#include <RadioLib.h> 
#define NSS  8 
#define DIO1 14 
#define NRST 12 
#define BUSY 13 
SX1262 radio = new Module(NSS, DIO1, NRST, BUSY); 

Потребление в режиме light_sleep с включенным дисплеем и  радиомодулем от батареи - 10мА, от 5В - 18мА.

Дальность связи в городе 433 FSK с родными антеннами около 300 метров.



1.1 Overview

HTIT-WS is a development board for Wi-Fi, Bluetooth and LoRa. Its functions are  
basically the same as “WiFi Lora 32”, except that the screen is reduced to 0.49 inch and  
a shielding shell is added.  
The HTIT-WS is composed up of an MCU (ESP32-S3FN8) and Semtech LoRa Transceivers  
(SX1262), perfectly support Arduino®. Users can easily carry out secondary  
development and application.  
The V3 version is upgraded as follows: 

LoRa Chip SX1276 SX1262
USB Socket Micro USB Type C
Crystal OscillatorOrdinary crystal oscillatorHigh precision temperature 
compensated crystal oscillator
Low power features 
in deep sleep
800uA <10uA
Other Better impedance matching of 
RF circuits


Wireless Stick Lite are available in two product variants:

HTIT-WS-LF470~510MHz working LoRa frequency, used for China mainland (CN470) LPW band.
HTIT-WS-HFFor EU868, IN865, US915, AU915, AS923, KR920 and  
other LPW networks with operating frequencies  
between 863~928MHz.

1.2 Product features

➢ Microprocessor: ESP32-S3FN8 (Xtensa® 32-bit LX7 dual core processor, five stage 
pipeline rack Structure, main frequency up to 240 MHz). 
➢ SX1262 LoRa node chip. 
➢ Type-C 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 spring antenna, reserved IPEX (U.FL) interface 
for LoRa use. 
➢ Onboard 0.49-inch 64*32 dot matrix OLED display, which can be used to display 
debugging information, battery power, and other information. 
➢ Integrated CP2102 USB to serial port chip, convenient for program downloading, 
debugging information printing. 
➢ Support the Arduino development environment. 
➢ We provide ESP32 + LoRaWAN protocol Arduino® library, this is a standard 
LoRaWAN protocol that can communicate with any LoRa gateway running the 
LoRaWAN protocol. In order to make this code running, a unique license is needed. 
it can be found on this page; 
➢ With good RF circuit design and low-power desig 


3. Specifications

3.1 General specifications 

Parameters Description
Master Chip ESP32-S3FN8 (Xtensa®32-bit lx7 dual core processor)
LoRa Chipset SX1262
USB to Serial Chip CP2102
Frequency 470~510 MHz, 863~928 MHz
Max. TX Power 21 ± 1 dBm
Max. Receiving sensitivity -139 dBm
Wi-Fi802.11 b/g/n, up to 150Mbps
Bluetooth Bluetooth LE: Bluetooth 5, Bluetooth mesh
Display 0.49-inch OLED
Hardware Resource 7*ADC1 + 2*ADC2; 7*Touch; 3*UART; 2*I2C; 2*SPI; etc. 
Memory384KB ROM; 512KB SRAM; 16KB RTC SRAM; 8MB SiP 

Type-C USB; 2*1.25 lithium battery interface; LoRa

ANT(IPEX1.0); 2*17*2.54 Header Pin

Battery 3.7V lithium battery power supply and charging
Operating temperature -20 ~ 70 ℃
Dimensions 58.08 * 22.6* 8.2 mm


3.5 LoRa RF characteristics

3.5.1 Transmit power


Operating frequency band Maximum power value/[dBm]
470~510 21 ± 1
867~870 21 ± 1
902~928 21 ± 1 

3.5.2 Receiving sensitivity

The following table gives typically sensitivity level of the HTIT-WS.

Signal Bandwidth/[KHz]  Spreading FactorSensitivity/[dBm]
125 SF12 -139
125 SF10 -130
125 SF7 -124

3.6 Operation Frequencies

HTIT-WS supports LoRaWAN frequency channels and models corresponding table.

Region  Frequency (MHz)Model
EU433 433.175~434.665 HTIT-WS-LF
CN470 470~510 HTIT-WS-LF
IN868 865~867 HTIT-WS-HF
EU868 863~870 HTIT-WS-HF
US915 902~928 HTIT-WS-HF
AU915 915~928 HTIT-WS-HF
KR920 920~923 HTIT-WS-HF
AS923 920~925 HTIT-WS-HF




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