lora.tx(confirmed, port, data) is not documented in the wiki
if called with confirmed=true the program occasionally will crash with an assertion - no ack received (if device is moving, if gateway is down, ..)
if called with confirmed=false the call will not return. this seems to be a result af waiting forever in hal_sleep (./components/lora/node/lmic/lmic_hal.c)
if i replace portMAX_DELAY by 10000 in hal_sleep (./components/lora/node/lmic/lmic_hal.c) the call will take ~30 seconds to complete. as can bee seen in the ttn console data will arrive within less than 1 second and i wonder what the program is waiting for.
just in case this project is still alive:
did i miss anything?