{"id":131,"date":"2014-03-30T13:51:05","date_gmt":"2014-03-30T13:51:05","guid":{"rendered":"http:\/\/projects.trueffelwurm.de\/?p=131"},"modified":"2014-03-31T17:32:00","modified_gmt":"2014-03-31T17:32:00","slug":"retrofit-radio-controlled-clock","status":"publish","type":"post","link":"https:\/\/jb0.de\/?p=131","title":{"rendered":"Retrofit radio controlled clock"},"content":{"rendered":"

Last sunday, germany switches to the daylight saving time again, so i needed to adjust some clocks.<\/p>\n

We had a weathers station with wireless temperature and humidity sensors that has a clock which needs to be adjusted manuall while most of that weather stations have radio controlled clocks integrated.
\nEven my very cheap weather receiver which i got from a giveway and was only used to analyze the wireless temperature signal has a time receiver.<\/p>\n

So i wondered if it is possible to put the receiver from the cheap weather station in the one we are using. Quickly opened it and found four empty soldering pads labled “RCC” – maybe radio controlled clock or something like that. Also the four pads itself are labled:<\/p>\n

GND – Ground
\nVDD – Voltage source (3V)
\nPON – Power on Signal (3V)
\nTCO – TimeCOntrol? At least a data pin..<\/p>\n

The labeling matches with the sensor, so i simply connected it:<\/p>\n