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
(Product ID: 1639289)Dev-BoardSTM32L151CBU6128kBLithiumxx7uAxLoRa Node 151
(Product ID: 1638100)Dev-BoardSTM32L151CCU6256kB1/2 AA Lithium chlorine sulfite battery??1.8uAxTurtle Board
(This item)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.
Introduction:
The turnkey Turtle board solution can be used immediately. Support standard LoRaWAN protocol and RadioShuttle protocol. The included RadioShuttle radio protocol software enables node-to-node communication without additional routers and servers. The Turtle LoRa board by HelTec Automation can run 10 years on AAA batteries (standard or rechargeable NiMH) using the RadioShuttle LoRa wireless low-energy protocol software. About RadioShuttle protocol: RadioShuttle Protocol is a node-to-node LoRa wireless communication protocol software. Compare with LoRaWAN(TM), which is capable of efficiently sending messages in a fast and secure way, any node can work as a gateway. We also provide the MQTT server and IOS / Android APP examples source code.
LoRaWANTMRadioShuttleConcentrator requiredNo concentrator required, the station uses regular LoRa moduleNetwork subscription fees (If use MQTT server)No monthly feesOne large radio cellMany small independent radio cellsBusy network in a radiu of many kilometersSmall networks with no interferenceSingle point of failure (Concentrator)Automatic transmitting power adjustment longer battery lifeHigh latency, larger spreading factor, e.g. SF11 (1320 ms)Low latency, small spreading factor, e.g. SF7 (120 ms)
Feature:
-CE Certificate;-Microprocessor: STM32L432KC (32-bit ultra-low power MCU) with LoRa node chip SX1276;-Micro USB interface with complete protection measures such as voltage regulation, ESD protection, and short circuit protection;-Onboard AAA x 2 battery holder, USB / battery power automatically switch;-Reserve IPEX and SMA antenna interfaces for LoRa use;-Programming and debugging interface can be combined with our downloader-Support DFU protocol, which can be downloaded conveniently via USB (combined with RadioShuttle STM32 Utility)-Professional software support (ARM Mbed IDE);-Provide Standard LoRaWAN protocol routines;-Good RF circuit design and perfect low-power design (sleep current: 4uA), which is convenient for IoT application vendors to quickly verify solution and deploy applications;
SourceParameterMCUSTM32L432KC (Ultra-low-power 32-bit MCU+FPU ARM® Cortex®-M4)LoRa chipSX1276LoRa bandsEU_433, CN_470_510, EU_863_870, US_902_928 four bands optionalLoRa maximum output power18dB ± 2dBHardware ResourceUSART x 3; SPI x 2; I2C x 2; SAI x 1; USB 2.0 x 112 bits ADC x 1; 12 bits DAC x 2DMA controller26 general GPIOFlash256KB FLASH;64KB SRAM;InterfaceMicro USB x 1; LoRa antenna(SMA) x 1, Debug interface(8-Pin)Size56.6 x 24 x 20 mmBattery TypeAAA x 2Battery detection circuit?External device power control(Vext)?Low power designDeep Sleep: 4uAElectrical characteristicsConditionMinimumTypicalMaximumPower SupplyUSB powered(?500mA)4.7V5V6VLithium powered(?250mA)1.8V3V3V3.3V(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)
