This is an example of LORA communication between STM32WL55 cards, and the frequency band of 868 ~ 928Mhz is used.
Long-distance wireless communication of up to 30Km is possible, and it has advantages in space, low power, and price compared to the structure that generally uses SX1276 + separate MCU.
Related hardware kits can be purchased from the Naver Smart Store.
Purchase Link : naver smart store
You can purchase it by contacting [email protected]
baudrate : 9600
| TX |
 |
| RX |
 |
SubGHZ-Phy / App / subghz_phy_app.c
#define REGION_AS923
#if defined( REGION_AS923 )
#define RF_FREQUENCY 923000000 // Hz
#elif defined( REGION_AU915 )
#define RF_FREQUENCY 915000000 // Hz
#elif defined( REGION_CN470 )
#define RF_FREQUENCY 470000000 // Hz
#elif defined( REGION_CN779 )
#define RF_FREQUENCY 779000000 // Hz
#elif defined( REGION_EU433 )
#define RF_FREQUENCY 433000000 // Hz
#elif defined( REGION_EU868 )
#define RF_FREQUENCY 868000000 // Hz
#elif defined( REGION_KR920 )
#define RF_FREQUENCY 920000000 // Hz
#elif defined( REGION_IN865 )
#define RF_FREQUENCY 865000000 // Hz
#elif defined( REGION_US915 )
#define RF_FREQUENCY 915000000 // Hz
#elif defined( REGION_RU864 )
#define RF_FREQUENCY 864000000 // Hz
#else
#error "Please define a frequency band in the compiler options."
#endif
#define TX_OUTPUT_POWER 14
#define LORA_BANDWIDTH 0 // [0: 125 kHz,
// 1: 250 kHz,
// 2: 500 kHz,
// 3: Reserved]
#define LORA_SPREADING_FACTOR 10 // [SF7..SF12]
#define LORA_CODINGRATE 1 // [1: 4/5,
// 2: 4/6,
// 3: 4/7,
// 4: 4/8]
#define LORA_PREAMBLE_LENGTH 8 // Same for Tx and Rx
#define LORA_SYMBOL_TIMEOUT 5 // Symbols
#define LORA_FIX_LENGTH_PAYLOAD_ON false
#define LORA_IQ_INVERSION_ON false
#define TX_BUFFER_SIZE 128
#define RX_BUFFER_SIZE 128
Works with STM32CubeIDE Version: 1.8.0, freeRTOS CMSIS_V2, Single-core
STM32WL55 module only support RFO_H
RF Switch IC MPN : BGS12SN6E6327XTSA1
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent