Transmit status results in MAC ACK Failure in XBee XB8X

[lorant124]

I’m using two XBee XB8X modules, API mode. I periodically check Extended Transmit Status - 0x8B for answer 0x25 (no route found). I often get back MAC ACK Failure answer, but even if connection is good. After 0x01 status (MAC ACK Failure) upcoming status is OK.
Please why I get MAC ACK failure ?

thank you for help

[mvut]

You are probably trying to transmit to often causing data collisions which is causing the ACK failure. The random back off and retry is what is getting thru.