`spi_data_logger_sd-10.ino`

BPI-5202 Loongson 2K1000LAi Embedded Single Board Industrial Computer · File : spi_data_logger_sd-10.ino · Language : bash · Use case : Enregistrer périodiquement l'état du système (CPU, RAM) sur le stockage SSD ou SD via SPI/SDIO pour la maintenance industrielle.

Lightweight Bash script to monitor key BPI-5202 metrics and save them to a CSV file on SSD/SD storage.

Uses standard Linux interfaces (/proc, /sys) accessible on Loongnix/KylinOS. The temperature path may vary depending on the specific thermal driver for 2K1000LAi (check /sys/class/thermal/). The script handles basic log rotation if disk space is critical on the internal SSD or SD card. Run in background with 'nohup ./bpi5202_logger.sh &' for continuous monitoring.

spi_data_logger_sd-10.ino

#!/bin/bash
# bpi5202_logger.sh
# Journalisation système sur stockage interne/externe du BPI-5202

LOG_FILE="/home/user/bpi5202_log_$(date +%Y%m%d).csv"
INTERVAL=10s

# Vérification de l'espace disque disponible
check_space() {
    free_space=$(df -m /home | tail -1 | awk '{print $4}')
    if [ "$free_space" -lt 100 ]; then
        echo "Alerte: Espace disque faible (<100MB)"
        # Optionnel: Rotation ou nettoyage des anciens logs
        rm -f /home/user/bpi5202_log_*.csv.old
        mv "$LOG_FILE" "${LOG_FILE}.old"
    fi
}

# Initialisation du fichier log avec en-tête
if [ ! -f "$LOG_FILE" ]; then
    echo "timestamp,cpu_temp,cpu_load,mem_used_mb,net_rx_kb" > "$LOG_FILE"
fi

echo "Démarrage du logger sur BPI-5202 (LoongArch). Log: $LOG_FILE"

while true; do
    check_space
    
    # Lecture des données système
    # Température CPU (chemin spécifique LoongArch/2K1000LAi peut varier, ex: /sys/class/thermal/thermal_zone0/temp)
    if [ -f "/sys/class/thermal/thermal_zone0/temp" ]; then
        temp_raw=$(cat /sys/class/thermal/thermal_zone0/temp)
        temp_c=$(awk "BEGIN {printf \"%.1f\", $temp_raw/1000}")
    else
        temp_c="N/A"
    fi
    
    # Charge CPU moyenne
    load_avg=$(awk '{print $1}' /proc/loadavg)
    
    # Mémoire utilisée (MB)
    mem_info=$(free -m | awk '/^Mem:/{print $3}')
    
    # Traffic Réseau (approximation via /proc/net/dev eth0)
    if [ -f "/proc/net/dev" ]; then
        rx_kb=$(awk '/eth0/{print $2/1024}' /proc/net/dev | cut -d'.' -f1)
    else
        rx_kb="0"
    fi
    
    # Enregistrement
    timestamp=$(date '+%Y-%m-%d %H:%M:%S')
    echo "$timestamp,$temp_c,$load_avg,$mem_info,$rx_kb" >> "$LOG_FILE"
    
    # Affichage console pour debug
    echo "[$timestamp] Temp: $temp_c C | Load: $load_avg | Mem: ${mem_info}MB"
    
    sleep $INTERVAL
done

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