AT89S51-based MCU and HS1101 do detect relative humidity. Needed can be downloaded reference.

Packet : 19854821fre_89s51led.rar filelist
Fre_89S51led\Backup Of fre89s51.DBK
Fre_89S51led\fre89s51
Fre_89S51led\fre89s51.c
Fre_89S51led\fre89s51.hex
Fre_89S51led\fre89s51.lnp
Fre_89S51led\fre89s51.LST
Fre_89S51led\fre89s51.M51
Fre_89S51led\fre89s51.OBJ
Fre_89S51led\fre89s51.Opt
Fre_89S51led\fre89s51.plg
Fre_89S51led\fre89s51.Uv2
Fre_89S51led\fre89s51_Opt.Bak
Fre_89S51led\hs_ne555p.c
Fre_89S51led\hs_ne555p.LST
Fre_89S51led\hs_ne555p.OBJ
Fre_89S51led\Last Loaded Frequence.DBK
Fre_89S51led\leddiplay.c
Fre_89S51led\leddiplay.LST
Fre_89S51led\leddiplay.OBJ
Fre_89S51led\STARTUP.A51
Fre_89S51led\STARTUP.lst
Fre_89S51led\STARTUP.obj
Fre_89S51led\types.h
Fre_89S51led

• We are an exchange download platform that only provides communication channels. The downloaded content comes from the internet. Except for download issues, please Google on your own.
• The downloaded content is provided for members to upload. If it unintentionally infringes on your copyright, please contact us.
• Please use Winrar for decompression tools
• If download fail, Try it againg or Feedback to us.
• If downloaded content did not match the introduction, Feedback to us，Confirm and will be refund.
• Before downloading, you can inquire through the uploaded person information

Nothing．