tLoRa spread spectrum communication (node);

tBattery powered;

tGood RF circuit design and impedance matching.

tNotes:

ntu2460 u2013 Type:

tDev-Board u2013 Can be used directly;

tModule u2013 Only core function, need to cooperate with external PCB or circuit.

tu2461 u2013 Lithium: All lithium battery socket for Heltec boards is SH1.25-2;

tu2462 u2013 Vext: 3.3V(500mA) output, for external devices (e.g. sensors) power supply, in deep sleep mode, Vext can be shut down via software;

tu2463 u2013 Low Power: Productsu2019 low power design, of Whole Circuit, the measured data are the current of the system during deep sleep.

t-CE Certificate;

t-Microprocessor: ESP32 (dual-core 32-bit MCU + ULP core), with LoRa node chip SX1276/SX1278;

t-Micro USB interface with a complete voltage regulator, ESD protection, short circuit protection, RF shielding, and other protection measures;

t-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);

t-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;

t-Onboard 0.96-inch 128*64 dot matrix OLED display, which can be used to display debugging information, battery power, and other information;

t-Integrated CP2102 USB to serial port chip, convenient for program downloading, debugging information printing;

t-Support the ARDUIN0 development environment;

t-We provide ESP32 + LoRaWAN protocol ARDUIN0 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;

t-With good RF circuit design and basic low-power design (sleep current u2264800uA), it is convenient for IoT application vendors to quickly verify solution and deploy applications.

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Source	Parameter
MCU	ESP32( 240MHz Tensilica LX6 dual-core + 1 ULP, 600 DMIPS, 520KB SRAM, Wi-Fi, dual mode Bluetooth)
LoRa chip	SX1276 (868 and 915 version); SX1278 (433 and 470 version)
LoRa bands	EU_433, CN_470_510, EU_863_870, US_902_928 four bands optional
LoRa maximum output power	18dB u00b1 2dB
Hardware resources	UART x 3; SPI x 2; I2C x 2; I2S x 1
	12 u2013 bits ADC; 8 u2013 bits DAC
	29 general GPIO
Display	0.96 inch 128*64 OLED display
FLASH	8MB(64M-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	u221a
External device power control(Vext)	u221a
Low power design	Deep Sleep 800uA

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Electrical characteristics	Condition	Min.	Typical	Max.
Power Supply	USB powered(u2265500mA)	4.7V	5V	6V
	Lithium powered(u2265250mA)	3.3V	3.7V	4.2V
	3.3V(pin)powered(u2265150mA)	2.7V	3.3V	3.5V
	5V(pin)powered(u2265500mA)	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

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