ESP32 Development Board Wireless Stick SX1276 LoRaWAN Protocol WIFI BLE
Tax included.
Heltec LoRa Node Products Difference Table:
Feature:
-On the basis of WiFi LoRa 32, it’s has a smaller size, 0.49″ OLED display, and better RF characteristics.
Package includes:
1 x ESP32 Development Board
“Heltec LoRa” product family already included follow options:
LoRa spread spectrum communication (node);
Battery powered;
Good RF circuit design and impedance matching.
| Product | Type??/span> | MCU | FLASH | Battery | Battery Detect | Vext??/span> | Low Power??/span> | Display |
| WiFi LoRa 32 | Dev-Board | ESP32 | 4MB | Lithium??/span> | x | x | x | OLED (128x64) |
| WiFi LoRa 32(V2) (Product ID: 1639291) |
Dev-Board | ESP32 | 8MB | Lithium??/span> | √ | √ | 800uA | OLED (128x64) |
| Wireless Stick (This item) |
Dev-Board | ESP32 | 8MB | Lithium??/span> | √ | √ | 800uA | OLED (64x32) |
| Wireless Stick Lite (Product ID: 1638098) |
Dev-Board | ESP32-PICO | 4MB | Lithium??/span> | √ | √ | 35uA | x |
| Wireless Shell (Product ID: 1638101) |
Module | ESP32-PICO | 4MB | – | √ | x | 10uA | x |
| LoRa Kit 151 (Product ID: 1639289) |
Dev-Board | STM32L151CBU6 | 128kB | Lithium | x | x | 7uA | x |
| LoRa Node 151 (Product ID: 1638100) |
Dev-Board | STM32L151CCU6 | 256kB | 1/2 AA Lithium chlorine sulfite battery | √ | √ | 1.8uA | x |
| Turtle Board (Product ID: 1638099) |
Dev-Board | STM32L432KC | 256kB | AAA x 2 | √ | √ | 5uA | x |
Notes:
??– Type:
Dev-Board – Can be used directly;
Module – Only core function, need to cooperate with external PCB or circuit.
??– Lithium: All lithium battery socket for Heltec boards is SH1.25-2;
??– Vext: 3.3V(500mA) output, for external devices (e.g. sensors) power supply, in deep sleep mode, Vext can be shut down via software;
??– Low Power: Products’ low power design, of Whole Circuit, the measured data are the current of the system during deep sleep.
Feature:
-On the basis of WiFi LoRa 32, it’s has a smaller size, 0.49″ OLED display, and better RF characteristics.
-CE Certificate;
-Microprocessor: ESP32 (dual-core 32-bit MCU + ULP core), with LoRa node chip SX1276/SX1278;
-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 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;
-(Exclusive) 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);
-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;
| 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 | |
| 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 800uA | |
| 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 ESP32 Development Board
How to install Heltec ESP32 Arduino Development Environment:
Wireless Stick Source code:
Heltec ESP(ESP32 & ESP8266) framework (the basic of Heltec ESP series products Arduino 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 Source code:
Summary of Common Problems:
AutoCAD & 3D Drawing:
AutoCAD 2017 version drawing: https://docs.heltec.cn/download/Wireless_Stick.dwg
Solid Works 2014 Version 3D Drawing: 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
Graphical interface displays sensor data (Wireless Stick + Sensor + Grafana): https://www.rosietheredrobot.com/2019/07/hard-grapht.html