DESCRIPTION
Note:
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;
-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;
Specification:
Source:
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.
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.
Package includes:
1 x Wireless ESP32 Stick Lite
