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Description
Based on ultra low power design, we launched LoRa Node 151， adopting the STM32L151CCU6 MCU (support DFU mode) and SX127x LoRa chip, use 1/2 AA Lithium chlorine sulfite battery. Enter low power mode under the standard LoRaWAN protocol, the Deep Sleep Current ≤ 1.8uA.
Overview
- 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.
Technical parameters:
| Resource | 参数 | ||
| Master Chip | STM32L151CBU6(Ultra-low-power 32-bit MCU ARM®-based Cortex®-M3) | ||
| Wireless Communication | LoRa | ||
| Node-to-node communication or LoRaWAN | |||
| LoRa Chip | SX1278 | ||
| LoRaWAN Area | hardware version | Support frequency | |
| LF | EU433 | ||
| CN470 | |||
| LoRa Maximum Output Power | 19dB ± 1dB | ||
| Hardware Resource | UART x 3; SPI x 2; I2C x 2; 12-bits ADC input x 8; 12-bits DAC output x 2; GPIO x 23 | ||
| FLASH | 128KB internal FLASH | ||
| RAM | 16KB internal SRAM | ||
| Interface | Micro USB x 1; LoRa Antenna interface(IPEX) x 1; 18 x 2.54 pin x 2 | ||
| Maximum Size (Including protruding parts such as switch and battery compartment) |
56.3 x 25.5 x 7.8 mm | ||
| USB to Serial Chip | x | ||
| Battery | 3.7V Lithium(SH1.25 x 2 socket) | ||
| Solar Energy | x | ||
| Battery Detection Circuit | x | ||
| External Device Power Control（Vext） | x | ||
| Low Power | Deep Sleep 6μA | ||
| Display Size | No display | ||
| Working Temperature | -40~80℃ | ||
| Electrical Features | Condition | Minimum | Typica | Maximum |
| Power Supply | USB powered（≥500mA） | 4.7V | 5V | 6V |
| Lithium powered（≥250mA） | 3.3V | 3.6V | 4.2V | |
| 3.3V（pin）powered（≥150mA） | 2.7V | 3.3V | 3.5V | |
| 5V（pin）powered（≥500mA） | 4.7V | 5V | 6V | |
| Power Consumption(mA) | LoRa 10dB output | 50mA | ||
| LoRa 12dB output | 60mA | |||
| LoRa 15dB output | 110mA | |||
| LoRa 20dB output | 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 |
Docs&Resource
- LoRa Kit 151 Example Code
- All the examples shown here is built by Keil MDK V5.26LoRaWAN example is restricted technical data, it will become downloadable after purchase, you can find it on your account page (Didn’t buy this product from our website or from a reseller? Youcan contact your provider or Email us):
- 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://resource.heltec.cn/download/LoRa_Kit_151/LoRa_Kit_151_sch_diagram.PDF
- Heltec LoRa Node Products Difference Table (Product Selection Table)
- https://docs.heltec.cn/#/en/products/lora/lora_node/heltec_lora_node_list_eu
- Summary of Common Problems
- http://www.heltec.cn/summary-of-common-problems-in-wifi-kit-series-continuous-update/?lang=en
- More Technical Data
- The more technical information will be sent to you by mail after purchase.
- No email received after buying? Please contact us via this email: support@heltec.cn
Test Info
Standing wave ratio(SWD) test of 470MHz
Smith chart of 470MHz
LoRa 433MHz RF power output
LoRa 470MHz RF power output
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