When using ot_program.py to program openmote-b over opentestbed with oos_openwsn firmware, it indicates there is no response message received from any motes within 30 seconds TIMEOUT.
If programming with bsp_leds firmware, the response messages are received from all motes.
By testing with larger TIMEOUT, i.e. 40 seconds, the response messages can be received as well when programming with oos_openwsn firmware.
This could related to the slow internet connection.
Test successes 10 times in a row, to program opentestbed with oos_openwsn firmware, using 40 seconds TIMEOUT.