SELECTED OPTION:
FREQUENCY: 433MHZ-470MHZ
Heltec LoRa Node Products Difference Table: Heltec LoRa product family already included follow options: LoRa spread spectrum communication (node); Battery powered; Good RF circuit design and impedance matching.
| Product | Type | MCU | FLASH | Battery | Battery Detect | Vext | Low Power | Display |
| WiFi LoRa 32 | Dev-Board | ESP32 | 4MB | Lithium | x | x | x | OLED (128x64) |
| |
WiFi LoRa 32(V2)
(Product ID: 1639291)
| Dev-Board | ESP32 | 8MB | Lithium | | | 800uA | OLED (128x64) |
Wireless Stick
(Product ID: 1639290) | Dev-Board | ESP32 | 8MB | Lithium | | | 800uA | OLED (64x32) |
Wireless Stick Lite
(This item) | Dev-Board | ESP32-PICO | 4MB | Lithium | | | 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: -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;
