Heltec IOT Lora Wireless stick upgrade esp32 lora/wifi lora Development Board with 0.49inch oled display 433MHZ/868MHZ/915MHZ

• 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 0.96-inch 128*64 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 basic low-power design (sleep current ≤800uA), it is convenient for IoT application vendors to quickly verify solutions and deploy applications.

Processor

Adopt Lexin’s ESP32 chip

 32-bit dual-core, 240MHz frequency

  Integrated WiFi and Bluetooth

 The main processor is completely free to run the user application.

 An additional ULP coprocessor that monitors GPIOs, ADC channels, and controls most of the internal        peripherals.

LoRa

Using Semtech’s SX1276 chip

 Supports 433MHz, 470MHz, 868MHz, 915MHz quad-band optional

Can be used as both a LoRa node and a micro gateway

 Support LoRaWAN protocol

Node transmission distance: up to 6KM in open space

 Output power: up to +20dBm (±2dBm)

WiFi

 802.11 b/g/n/e/i

802 802.11 n (2.4GHz), speed up to 150Mbps

802 802.11 e: QoS mechanism to implement wireless multimedia technology

 WMM-PS, UAPSD

 MPDU and A-MSDU frame aggregation technology

Block reply, fragmentation and reorganization

 Beacon automatic monitoring / scanning

802 802.11 i security features: pre-authentication and TSN

 Support WPA / WPA2 / WPA2-Enterprise / WPS encryption

 Infrastructure BSS Station Mode / SoftAP Mode

 Wi-Fi Direct (P2P), P2P discovery, P2P GO mode and P2P power management

 Support for IPv6

Bluetooth

Bluetooth v4.2 full standard, including traditional Bluetooth (BR/EDR)

And Bluetooth Low Energy (BLE)

 Supports standard Class-1, Class-2 and Class-3 without external power amplifier

 Enhanced precision power control

 Output power up to +10 dBm

 NZIF receiver with BLE reception sensitivity of -128 dBm

Adaptive Frequency Hopping (AFH)

   Standard HCI based on SDIO / SPI / UART interface

High speed UART HCI up to 4 Mbps

 Support BT 4.2 controller and host protocol stack

 Service Discovery Protocol (SDP)

Universal Access Application (GAP)

Security Management Protocol (SMP)

 Low power Bluetooth

ATT ATT / GATT

 HID

 Supports all GATT-based Bluetooth low energy applications

 SPP-Like Low-Power Bluetooth Data Transmission Protocol

BLE BLE Beacon

 A2DP / AVRCP / SPP, HSP / HFP, RFCOMM

 CVSD and SBC audio codec algorithms

Bluetooth piconet (Piconet) and scatternet (Scatternet)

Human interaction

 0.49 inch OLED screen

 button (reset and program)

power supply

 Input power: USB, lithium battery

 Output power: +5V (only when USB is powered), +3.3V

Integrated lithium battery charging circuit

 External power supply controlled by IO port to facilitate development board to enter low power consumption

interface

UART UART, SPI, I2C, I2S, Mirco SD card

 12 – bits ADC, 8 – bits DAC

 29 general GPIO ports

storage

 FLASH: 64M-BitsMB

Power consumption

Sleep current: 800uA

Mechanical structure

 Size: 60mmX23mmX8mm