added printf

main.c

@@ -27,10 +27,11 @@ int main(int argc, char * argv[]) {
   const char testStr[] = "cat /proc/cpuinfo | grep 'Revision' | awk '{print $3}' | sed 's/^1000//' | grep '902120'";
   FILE *file_test = sopen(testStr);  // see if Pi Zero 2  
   fgets(resbuffer, 1000, file_test);
-//  fprintf(stderr, "test result: %s\n", resbuffer);
+  fprintf(stderr, "test result: %s\n", resbuffer);
   fclose(file_test);	
   
-//  fprintf(stderr, strlen(resbuffer));
+  fprintf(stderr, " %x ", resbuffer[0]);
+  fprintf(stderr, " %x ", resbuffer[1]);	
   if (resbuffer[0] != 0) 
   {
     sleep(5);  // try sleep at start to help boot