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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.
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) |
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LoRa chip |
SX1276 |
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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 |
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Flash |
256KB FLASH;64KB SRAM; |
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Interface |
Micro USB x 1; LoRa antenna(SMA) x 1, Debug interface(8-Pin) |
|
Size |
56.6 x 24 x 20 mm |
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Battery Type |
AAA x 2 |
|
Battery detection circuit |
√ |
|
External device power control(Vext) |
√ |
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Low power design |
Deep Sleep: 4uA |
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Electrical characteristics |
Condition |
Minimum |
Typical |
Maximum |
|
Power Supply |
USB powered(≥500mA) |
4.7V |
5V |
6V |
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Lithium powered(≥250mA) |
1.8V |
3V |
3V |
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3.3V(pin)powered(≥150mA) |
2.7V |
3.3V |
3.5V |
|
5V(pin)powered(≥500mA) |
4.7V |
5V |
6V |
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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:
United Kingdom , USD
