STM32WL55 6-Axis LoRa Motion Tracker

The STM32WL55 6-Axis LoRa Motion Tracker collects key information required for asset tracking such as acceleration, angular velocity, temperature, and GPS location, and charges the battery using solar power.

This is an example that provides quick testing of various service scenarios that require long-distance communication of 1Km or more.

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Device can be purchased from the Naver Smart Store.

Purchase Link : naver smart store

You can purchase it by contacting sales@axden.io

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Key feature and functions

MCU	Description
STM32WL55	LoRa SoC

Sensors	Description
L76	GPS sensor
MAX2659	GPS LNA
LSM6DSl	6 Axis Accelerometer, Gyroscope
Si7051	Temperature sensor
Si7201	Hall Sensor
SPV1050	Solar battery charger (Max charge current 80mA)
Solar	On board
Battery	3.7V Lithium Battery

It is a motion tracker capable of LORA communication.

LoRa wireless communication is performed using STM32WL55 SoC

Sub-G wireless communication is performed using CC1310 SoC

It can be turned on and off using Si7201 hall sensor and magnet.

Use LSM6DSL to collect acceleration and gyro sensor values.

The temperature value is collected using the Si7051 sensor.

It operates for 5 years using a battery.

There is a connector that can connect UART X1 and I2C X1, so it can be expanded.

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Note

This program is not suitable for mass production and commercialization as an example program.

B2B customers should contact development@axden.io.

For B2B customers, we develop firmware optimized for customers' purposes, such as low power, stabilization, and communication with gateways, for free.

Top	Bottom

Works with STM32CubeIDE Version: 1.8.0, freeRTOS CMSIS_V2, Single-core

STM32WL55 module only support RFO_H

RF Switch IC MPN : BGS12SN6E6327XTSA1

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STM32WL55 Radio setup

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

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STM32WL55 Pin map