The console automatically triggers a 3-minute search mode to detect the 433 MHz RF link. The outdoor temperature and humidity fields will update once a successful connection is established. Understanding the DCF77 Radio Clock Sync
Elias grabbed two AA batteries. The red LED on the transmitter blinked once. So far, so good. wireless weather station h10515 dcf manual verified
Low batteries in the console (even if using power adapter, the backup batteries may be dead). Fix: Replace console AAA batteries. If using the adapter, unplug it, remove batteries, press any button 10 times to drain residual charge, then reinstall everything. The console automatically triggers a 3-minute search mode