The "echo" app is still not playing back (on BT200) but it has improved.
[firmerware] / bin /
drwxr-xr-x   ..
drwxr-xr-x - i2cp
drwxr-xr-x - kconfig
-rw-r--r-- 58704 lex.zconf.c
-rwxr-xr-x 149998 mconf
-rw-r--r-- 10059 zconf.hash.c
-rw-r--r-- 72281 zconf.tab.c