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Photos of the insides of Fine Offset sensors.

Discussion specific to Fine Offset and similar rebadged weather stations
AllyCat
Posts: 1045
Joined: Sat Feb 26, 2011 1:58 pm
Weather Station: Fine Offset 1080/1 & 3080
Operating System: Windows XP SP3
Location: SE London

Re: Is it possible to change the Humidity-Sensor on the circuit board?

Post by AllyCat » Sat Dec 23, 2017 3:41 pm

Hi,
wetterfrosch1971 wrote:The Temperature-Sensor works exactly, but the Humidity-Sensor is worn.
There have been several different types of humidity sensor fitted in these stations and I thought the more recent versions use the same sensor for temperature and humidity. However, it should still be on a small module or "daughter board", so quite easy to exchange. See photos # 4 and # 11 on the first page of this thread.

Cheers, Alan.

wetterfrosch1971
Posts: 93
Joined: Sun Apr 06, 2014 1:15 pm
Weather Station: wh1080
Operating System: windows7
Location: south-west-germany

Re: Photos of the insides of Fine Offset sensors.

Post by wetterfrosch1971 » Sat Dec 23, 2017 9:12 pm

Hi,

I have two different transmitter, look at the pictures, once with a "daughter board" and once without.
But both have a white component, is this the Humidity-Sensor?
But I can not find a name on the White component, if this are the humidity-sensor, what is the name or were I can buy it?

Many thanks for help.
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anxiousmac
Posts: 1
Joined: Tue Feb 21, 2012 8:31 am
Weather Station: Arduino board, various sensors
Operating System: Linux
Location: Belbroughton, West Midlands

Re: Photos of the insides of Fine Offset sensors.

Post by anxiousmac » Tue Dec 26, 2017 10:22 pm

Probably an SHT11 or similar.
They seem to be about £2 or so on ebay.

anxiousmac

AllyCat
Posts: 1045
Joined: Sat Feb 26, 2011 1:58 pm
Weather Station: Fine Offset 1080/1 & 3080
Operating System: Windows XP SP3
Location: SE London

Re: Photos of the insides of Fine Offset sensors.

Post by AllyCat » Wed Dec 27, 2017 4:51 pm

Hi,

Possibly worth a try, but it could be a SHT/DHT 15 or 21, or AM2301, etc.. First thing to check is if it's using 2, 3 or 4 wires/pins to connect to the main board. That may help determine if it's an I2C, SPI or a "one-way" data bus.

The sensor is probably made by the Chinese company "Hope Microelectronics", but AFAIK they only/mainly supply to OEMs, not distributors.

The "White module" on the daughter board of one of my transmitters is the humidity sensor, but uses only 2 pins. Two pads marked NTC are not populated and there appears to be a SMD chip on the underside.

Cheers, Alan.

wetterfrosch1971
Posts: 93
Joined: Sun Apr 06, 2014 1:15 pm
Weather Station: wh1080
Operating System: windows7
Location: south-west-germany

Re: Photos of the insides of Fine Offset sensors.

Post by wetterfrosch1971 » Thu Dec 28, 2017 1:37 am

Hi,

SHT11 has 4 pins,
but the sensor in my transmitter has only 2 pins.

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