STM32L151CBU6 Development Board LoRaWAN Low Power IoT Node CP2102 USB to Serial Port SX1278 Module
- Stock: In Stock
- Model: ST230042595
- SKU: ST230042595
$20.29
Ex Tax: $20.29
Heltec LoRa Node Products Difference Table:
Feature:
-In order to meet the user’s requirements for Ultra-Low-Power and standard LoRaWAN protocol, we designed this product. On the basis of STM32L151CBU6MCU and SX1278 LoRa chip(433, 470MHz), the low power current can reach to 6uA.
Package includes:
1 x STM32L151CBU6 Development Board
“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 (128x64) |
|
WiFi LoRa 32(V2) | Dev-Board | ESP32 | 8MB | Lithium② | √ | √ | 800uA | OLED (128x64) |
| Wireless Stick | Dev-Board | ESP32 | 8MB | Lithium② | √ | √ | 800uA | OLED (64x32) |
| Wireless Stick Lite | Dev-Board | ESP32-PICO | 4MB | Lithium② | √ | √ | 35uA | x |
| Wireless Shell | Module | ESP32-PICO | 4MB | – | √ | x | 10uA | x |
|
LoRa Kit 151 (This item) | Dev-Board | STM32L151CBU6 | 128kB | Lithium | x | x | 7uA | x |
| LoRa Node 151 | Dev-Board | STM32L151CCU6 | 256kB | 1/2 AA Lithium chlorine sulfite battery | √ | √ | 1.8uA | x |
| Turtle Board | 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.
Feature:
-In order to meet the user’s requirements for Ultra-Low-Power and standard LoRaWAN protocol, we designed this product. On the basis of STM32L151CBU6MCU and SX1278 LoRa chip(433, 470MHz), the low power current can reach to 6uA.
-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.
| Source | Parameter |
| MCU | STM32L151CBU6 (Ultra-low-power 32-bit MCU ARM®-based Cortex®-M3) |
| LoRa chip | SX1278 |
| LoRa bands | EU_433, CN_470_510,two bands optional |
| LoRa maximum output power | 18dB ± 1dB |
| Hardware Resource | USART x 3; SPI x 2; I2C x 2; ; USB 2.0 x 1 |
| 12 – bits ADC; 12 – bits DAC | |
| DMA controller | |
| 28 general GPIO | |
| Flash | 128KB FLASH;16KB SRAM;4KB EEPROM;80B BACKUP REGISTER |
| Interface | Micro USB x 1; LoRa antenna(IPEX) x 1 |
| length x width x height(pin) | 57 x 27 x 7(14) mm |
| Battery type | Lithium |
| Low power design | Deep Sleep: 6uA |
| 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 the input current | |||
| External device power control (Vext 3.3V) | 350mA |
Package includes:
1 x STM32L151CBU6 Development Board
LoRa Kit 151 Example Code:
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://docs.heltec.cn/download/LoRa_Kit_151_sch_diagram.PDF
Summary of Common Problems:
http://www.heltec.cn/summary-of-common-problems-in-wifi-kit-series-continuous-update/?lang=en
