Ultra-low Power Turtle Board STM32L432KC SX1276 LoRaWAN Supports LoRaWAN MQTT Single Channel Wireless Module
$75.99

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Ultra-low Power Turtle Board STM32L432KC SX1276 LoRaWAN Supports LoRaWAN MQTT Single Channel Wireless Module

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Product 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.

Product	Type①	MCU	FLASH	Battery	Battery Detect	Vext③	Low Power④	Display
WiFi LoRa 32	Dev-Board	ESP32	4MB	Lithium②	x	x	x	OLED (128×64)
	Dev-Board	ESP32	8MB	Lithium②	√	√	800uA	OLED (128×64)
	Dev-Board	ESP32	8MB	Lithium②	√	√	800uA	OLED (64×32)
	Dev-Board	ESP32-PICO	4MB	Lithium②	√	√	35uA	x
	Module	ESP32-PICO	4MB	–	√	x	10uA	x
	Dev-Board	STM32L151CBU6	128kB	Lithium	x	x	7uA	x
	Dev-Board	STM32L151CCU6	256kB	1/2 AA Lithium chlorine sulfite battery	√	√	1.8uA	x
Turtle Board (This item)	Dev-Board	STM32L432KC	256kB	AAA x 2	√	√	5uA	x

Notes:

① – Type:

Dev-Board – Can be used directly;

Module – Only core function, need to cooperate with external PCB or circuit.

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

③ – Vext: 3.3V(500mA) output, for external devices (e.g. sensors) power supply, in deep sleep mode, Vext can be shut down via software;

④ – 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.

LoRaWANTM	RadioShuttle
Concentrator required	No concentrator required, the station uses regular LoRa module
Network subscription fees (If use MQTT server)	No monthly fees
One large radio cell	Many small independent radio cells
Busy network in a radius of many kilometers	Small networks with no interference
Single point of failure (Concentrator)	Automatic transmitting power adjustment – longer battery life
High 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 solutions and deploy applications;

Source	Parameter
MCU	STM32L432KC(Ultra-low-power 32-bit MCU+FPU ARM® Cortex®-M4)
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 Resource	USART x 3; SPI x 2; I2C x 2; SAI x 1; USB 2.0 x 1
	12 – bits ADC x 1; 12 – bits DAC x 2
	DMA controller
	26 general GPIO
Flash	256KB FLASH;64KB SRAM;
Interface	Micro USB x 1; LoRa antenna(SMA) x 1, Debug interface(8-Pin)
Size	56.6 x 24 x 20 mm
Battery Type	AAA x 2
Battery detection circuit	√
External device power control(Vext)	√
Low power design	Deep Sleep: 4uA

Electrical characteristics	Condition	Minimum	Typical	Maximum
Power Supply	USB powered(≥500mA)	4.7V	5V	6V
	Lithium powered(≥250mA)	1.8V	3V	3V
	3.3V(pin)powered(≥150mA)	2.7V	3.3V	3.5V
	5V(pin)powered(≥500mA)	4.7V	5V	6V
Power consumption(mA)	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

Package includes:

1 x Turtle Board
1 x Box

File support:

PDF Data Sheet:

Know more about Turtle Board:

Know more about RadioShuttle Protocol:

RadioShuttle STM32 Utility (DFU Tools Special for Turtle Board):

Turtle Board Pin out Diagram:

More Detailed Photos:

Additional Information

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Airmail and Airmail Registered	Area	Time
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	Australia, New Zealand, Singapore	10-25 business days
	United Kingdom, France, Spain, Germany, Netherlands, Japan, Belgium, Denmark, Finland, Ireland, Norway, Portugal, Sweden, Switzerland	10-25 business days
	Italy, Brazil, Russia	10-45 business days
	Other countries	10-35 business days
Expedited Shipping	7-15 business days to Worldwide