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My Youshiko YC9387(W) 5in1 weather sensor stopped displaying temperature and humidity. I emailed Youshiko but they weren't able to provide a replacement part (poor design there as this item should be swappable given they only last a couple of years outside), so they offered a discount on a new weather station instead. At £70 i decided no thanks i'll repair it myself!
VCC GND SDA SCL
You simply need one of these sensors which are about £5 off Ebay
You simply need one of these sensors which are about £5 off Ebay
Next, remove all of the screws underneath the weather station unit and those from the temperature sensor housing to gain access to the main circuit board
Next, remove all of the screws underneath the weather station unit and those from the temperature sensor housing to gain access to the main circuit board
The bottom 4 wires of the main circuit board need desoldering. They are (in order as soldered):
Red = Vcc
White 1 = SCL
White 2 = SCA
White 3 = GND
This image is shown for reference, you dont need to remove the potting to get to the wires on the old sensor, simply cut them and throw it away!
This image is shown for reference, you dont need to remove the potting to get to the wires on the old sensor, simply cut them and throw it away!
I used a dremel to chop them off including the plastic mounting then glued the new sensor in its position
If you gently prise the two parts of the new sensor case open (it is designed to be opened and closed!)you will see which pin is which connection as they are labelled (they are in a different position to the old sensor).
If you gently prise the two parts of the new sensor case open (it is designed to be opened and closed!)you will see which pin is which connection as they are labelled (they are in a different position to the old sensor).
You need this to match up with the pins on the circuit board (shown above). Use some new wire so you have some extra length to play with as the original is quite short and you can use different colours rather than 3 white wires!
You need this to match up with the pins on the circuit board (shown above). Use some new wire so you have some extra length to play with as the original is quite short and you can use different colours rather than 3 white wires!
Simply solder your new wires from new sensor pins to the appropriate circuit board pads after feeding them through the hole in the upper plastic, place it inside the temperature sensor housing (i hot-glued mine) then screw it all back together. Turn it on, connect to the base unit and you should now have a temperature and humidity reading again!
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