#!/bin/bash                                                                                                                                                                                     
# WSPR Audio Recorder Script by DJ0ABR                                                                                                                                                                                                
# record WSPR signal at every even minute                                                                                                                                                       
# called by cronjob                                                                                                                                                                             
                                                                                                                                                                                                
# number of files in wav folder                                                                                                                                                                 
cd /home/bananapi/wsprcan-master/wav                                                                                                                                                            
file_num=$(ls -1 --file-type | grep -v '/$' | wc -l)                                                                                                                                            
cd ..                                                                                                                                                                                           
if [ "$file_num" -le "1" ] ; then                                                                                                                                                               
        DT=$(date -u +"%y%m%d_%H%M")                                                                                                                                                            
        echo record at $DT                                                                                                                                                                      
        arecord -d 112 -f S16_LE -r 12000 -t wav /home/bananapi/wsprcan-master/wav/wspr_${DT}.wav                                                                                               
        ./decode $DT &                                                                                                                                                                          
fi