Hi @crazynight, welcome to the MySensors community! Seems like the node is unable to send messages to the gateway. If you are using the nrf24 radio, the cause of the communication problem is most likely insufficient/unstable power. If you haven't already, see https://forum.mysensors.org/topic/666/debug-faq-and-how-ask-for-help/ for the most common causes and how to troubleshoot them. It also contains a checklist of what information is most useful to post so people can assist you.