maybe will be helpfull my small UDP debugger for DIGI modules
please dowload it from:
unpack it anywhere, to IP address line simple write module IP address and click to memo
when the module is configured for UDP , module led must flashing quickly
all stdio funcs such prinf("hello\n") will be written to MEMO
----how to config module:---
#define BSP_STDIO_PORT "/udpdb/0"
#define BSP_INCLUDE_UDP_DEBUG_DRIVER TRUE