Heltec STM32L151CCU6 + SX1276 LoRaWAN Node Ultra-low Power Module Support 2AA Lithium Sub Battery Power Supply
Feature:
-CE Certificate;
-Microprocessor: STM32L151CCU6(ARM® Cortex®-M3 32-bit RISC core,support DFU mode) , with LoRa® node chip SX1276/SX1278;
-Onboard user resources available: 256 Kbytes of Flash memory with ECC; 32 Kbytes of RAM; 8 Kbytes of true EEPROM with ECC; 128-byte backup register.
-Micro USB interface with a complete voltage regulator, ESD protection, short circuit protection, and other protection measures;
-1/2 AA battery shell, use 1/2 AA Lithium chlorine sulfite battery (this battery can’t charge, but onboard USB / battery power automatic switching allows connect USB when the battery is assembled);
-Reserve SMA antenna interface for LoRa use
-Download the firmware via DFU or ST-LINK;
-Provide complete LoRaWAN(ClassA/C) source code(support ABP and OTAA);
-With good RF circuit design and basic low-power design (sleep current: 1.8uA), it is convenient for IoT application vendors to quickly verify solutions and deploy applications;
Package includes:
1 x Power Supply Module
File support:
| Source | Parameter |
| MCU | STM32L151CCU6(Ultra-low-power 32-bit MCU ARM®-based Cortex®-M3) |
| LoRa chip | SX1276/SX1278 |
| 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; I2S x 2; USB 2.0 x 1 |
| 12 – bits ADC; 12 – bits DAC | |
| DMA controller | |
| 38 general GPIO | |
| Flash | 256KB FLASH; 32KB SRAM; 8KB EEPROM; 128B BACKUP REGISTER |
| Interface | Micro USB x 1; LoRa antenna(SMA) x 1 |
| Size | 56.6 x 24 x 20 mm |
| battery type | 1/2 AA Lithium chlorine sulfite battery |
| Battery detection circuit | √ |
| External device power control(Vext) | √ |
| Low power design | Deep Sleep: 2.5uA |
| Electrical characteristics | Condition | Minimum | Typical | 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 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 input current | |||
| External device power control (Vext 3.3V) | 350mA |
Package includes:
1 x Power Supply Module
File support:
LoRa Node 151 Example Code:
LoRa Node 151 basic hardware test example (only hardware layer LoRa signal send and receive, need at least two board to test): https://docs.heltec.cn/download/LoRa_Node_151_basic_hardware_test.zip
LoRa Node 151 didn’t have a UART-USB bridge, users can print data via virtual serial port, here is the project package: https://docs.heltec.cn/download/L151_USB.zip
How to Download Firmware into LoRa Node 151:
English version: https://docs.heltec.cn/#/en/user_manual/how_to_download_firmware_into_lora_node_151
STM32 Cube Programmer:
ST provided writing and verifying device memory through both the debug interface (JTAG and SWD) and the bootloader interface (UART, USB DFU, I2C, SPI, and CAN): www.st.com/stm32cubeprog
LoRa Node 151 Pinout Diagram:
Summary of Common Problems:
English version: https://docs.heltec.cn/#/en/faq/lora_node_151_common_problem_summary
AutoCAD:
AutoCAD 2017 version drawding: docs.heltec.cn/download/LoRa_Node_151.dwg
Heltec STM32L151CCU6 + SX1276 LoRaWAN Node Ultra-low Power Module Support 2AA Lithium Sub Battery Power Supply See detail
