Description
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.
ProductType?MCUFLASHBatteryBattery DetectVext?Low Power?DisplayWiFi LoRa 32Dev-BoardESP324MBLithium?xxxOLED (128x64)WiFi LoRa 32(V2)
(Product ID: 1639291)Dev-BoardESP328MBLithium???800uAOLED (128x64)Wireless Stick
(Product ID: 1639290)Dev-BoardESP328MBLithium???800uAOLED (64x32)Wireless Stick Lite
(Product ID: 1638098)Dev-BoardESP32-PICO4MBLithium???35uAxWireless Shell
(Product ID: 1638101)ModuleESP32-PICO4MB?x10uAxLoRa Kit 151
(This item)Dev-BoardSTM32L151CBU6128kBLithiumxx7uAxLoRa Node 151
(Product ID: 1638100)Dev-BoardSTM32L151CCU6256kB1/2 AA Lithium chlorine sulfite battery??1.8uAxTurtle Board
(Product ID: 1638099)Dev-BoardSTM32L432KC256kBAAA x 2??5uAx
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:
-In order to meet the users requirements for Ultra-Low-Power and standard LoRaWAN protocol, we designed this product. On the basis of STM32L151CBU6MCU and SX1278 LoRa chip(433, 470MHz), the low power current can reach to 6uA.
-CE Certificate;-Microprocessor: STM32L151CBU6 (Ultra-low-power ARM Cortex-M3 MCU with 128 Kbytes Flash), with LoRa node chip SX1278 (433MHz ~ 510MHz);-Micro USB interface with a complete voltage regulator, ESD protection, short circuit protection, and other protection measures;-Onboard SH1.25-2 battery interface, integrated lithium battery interface, integrated battery management system (battery power detection, USB / battery power automatic switching);-Integrated CP2102 USB to serial port chip, convenient for program downloading, debugging information printing;-This product supports DFU mode download (need to cooperate with relevant download software).-System resource: FLASH 128K, RAM 16K, EEPROM 4K;-User available resources: FLASH 64K, RAM 8K, EEPROM 4K;-Provide standard LoRaWAN protocol routines.-With good RF circuit design and basic low-power design (sleep current ?7uA), it is convenient for IoT application vendors to quickly verify-LoRaWAN protocol easily.
SourceParameterMCUSTM32L151CBU6 (Ultra-low-power 32-bit MCU ARM®-based Cortex®-M3)LoRa chipSX1278LoRa bandsEU_433, CN_470_510,two bands optionalLoRa maximum output power18dB ± 1dBHardware ResourceUSART x 3; SPI x 2; I2C x 2; ; USB 2.0 x 112 bits ADC; 12 bits DACDMA controller28 general GPIOFlash128KB FLASH;16KB SRAM;4KB EEPROM;80B BACKUP REGISTERInterfaceMicro USB x 1; LoRa antenna(IPEX) x 1length x width x height(pin)57 x 27 x 7(14) mmBattery typeLithiumLow power designDeep Sleep: 6uAElectrical characteristicsConditionMinimumTypicalMaximumPower SupplyUSB powered(?500mA)4.7V5V6V Lithium powered(?250mA)3.3V3.6V4.2V3.3V(pin)powered(?150mA)2.7V3.3V3.5V5V(pin)powered(?500mA)4.7V5V6VPower consumption(mA)LoRa 10dB emission 50mA LoRa 12dB emission 60mA LoRa 15dB emission 110mA LoRa 20dB emission 130mA Output3.3V pin output 500mA5V pin output (USB powered only) Equal to the input current External device power control (Vext 3.3V) 350mA
Package includes:
1 x STM32L151CBU6 Development Board
LoRa Kit 151 Example Code:LoRa Kit 151 Pingpang test example code (need two LoRa Kit 151 to test): https://heltec.org/wp-content/uploads/2019/07/Kit_151_PingPang.zip LoRa Kit 151 Schematic diagram:https://docs.heltec.cn/download/LoRa_Kit_151_sch_diagram.PDF Summary of Common Problems:http://www.heltec.cn/summary-of-common-problems-in-wifi-kit-series-continuous-update/?lang=en
