Solved. Issue with power supply. Added a capacidade to power source.

Hi all, Should any one need, the fix mentioned in this page actually works. Thanks,

Hi all, Should anyone face the same problem, I found the root cause: brownout threshold. I burned a new bootloader (Optiboot 8.0) without such trigger and the node has been working with used batteries (~2.7V) since May. Hope this helps.

Thanks @mfalkvidd @OldSurferDude ! The problem really was the antenna. I was using the helical antenna below and I welded in the "wrong" part of it the first time. The second I welded it on the "right" place and it work. The RSSI is still below that the old and good wire... am I welding it on the really right place? [image: 1662842053028-screenshot-from-2022-09-10-17-28-57.png] Are helical antennas good? Thanks again for the great support you provide.

Problem solved: I was using as --my-mqtt-client-id the same name as my previous broker. Thanks for your help all!

The product listing for the step-up that the OP is using says: Sucks the juice out of your batteries. Sounds like it delivers on what it promises.... :rolling_on_the_floor_laughing:

No, actually I use the RPi just as power source. The gateway connects to the hub over WiFi. The RPi is good (the original one). I will try to move to an independent power source just to test. Thanks for the reply again.