@sundberg84
The node on the breadboard is on the same desk and same distance to gateway. The same for my first sensor. And both are working well. Only issue with 4 sensors a soldered afterwords.

Just remember now that I used for the first sensor other solder. But do not think that this is causing the issue or .....

@m26872
Distance is about 50cm. They are both on my desk. If testing then I do not tough the sensor. Just when trien pressing a radio an a non function radio.
I tried to de-solder the radio but did not succeed. Cut the pins, removed them and soldered wires to it. Connected to a new radio. Strange part is that the on very irregular basis message are received in MYSController. Also with a radio which is functioning well on the breadboard

Since a few months I am very interested in Mysensors and this PCB. I have ordered the PCB and components to build some sensors as for a home security system. For experimental purpose I build one on a breadboard and that is working fine.
A few days ago I started to solder the components on the PCB. The firs one is working fine, but the next sensors have an issue with the transceiver. After 3 boards failing I soldered one without the transceiver. Then I tested it by holding the transceiver at the board and it was working fine. After soldering the transceiver again a not working board.

I tested one board by pressing another transceiver on top of the soldered one and I saw some communication in MYSController. The ATMega is still working on the breadboard. The PCB and Breadboard are powered by the same batterypack.

Before soldering I tested all the transceivers with my breadboard and they are working fine. I am also using an anti-static bracelet.

What am I doing wrong??