SX1272 LoRa Node (RF module) v1.2
XRange LoRa Node is a wireless electronics development platform based on the SX1272 LoRa™ long range modem and low-power STM32L151 ARM micro-controller that provides communication over 12km (7 miles) of usable range.
SX1272 LoRa™ long range modem
- 157 dB maximum link budget
- +20 dBm at 100 mW constant RF output
- +14 dBm high efficiency PA
- Programmable bit rate up to 300 kbps
- High sensitivity: down to -137 dBm
- Low RX current of 10 mA, 100 nA register retention
- Fully integrated synthesizer with a resolution of 61 Hz
- FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation
- Packet engine up to 256 bytes with CRC
For more information about SX1272
Low-power STM32L151 microcontroller
- ARM Cortex-M3 CPU at 32MHz
- 256 KBytes Flash
- 2x Op-Amp
- 12bit ADC 1 Msps 2 channels
- 12bit DAC 2 channels
- 2x Comparators
- USB 2.0 Full Speed
- Up to 2x USARTs, 2x SPIs 16Mbit/s, 2x I2C
- Up to 11x timers
- 96bit unique ID
- Real-time clock
For more information about STM32L151
Board Power supply (Based on TPS62160)
- through USB bus
- external input voltage 3.3V – 17V
- system voltage 3.0 or 2.7 selectable
- output 3.0V/1A or 2.7V/1A selectable
I/O Pins
- Over-current protection on all I/O pins
- ESD protection on USB port
MCU Flash Programming
- USB Bootloader
- SWD connector
Dimensions 66 mm x 42 mm
Software development tools
- Keil MDK-ARM
- IAR ARM Workbench
- EmBlocks free IDE
- Mbed
- GCC ARM toolchain
Specifications
| Frequency |
Antenna |
RF Power |
SWR |
| 869 MHz |
Dummy load 50 ohm |
18.5 dBm ( 72 mW ) |
1.2 |
| 916 MHz |
Dummy load 50 ohm |
17.0 dBm ( 51 mW ) |
1.3 |
- Power Consumption (max) for RF power 18.5 dBm
| Power Supply Voltage (Vin) |
SX1272 in sleep mode, MCU Standby Mode with RTC |
Rx (MCU running at 32MHz) |
Tx (MCU running at 32MHz) |
| 3.7V |
70 uA |
20 mA |
109 mA |
| 9V |
48 uA |
8.6 mA |
47 mA |
| 12V |
36 uA |
6.7 mA |
35 mA |
