Thomas Liu

Member Since: December 5, 2010

Country: United States

  • Product SEN-10167 | about 3 years ago

    It does’t exsit RHT03 or DHT22 version. RHT03 and DHT22 are two different names for one same product.
    We have three names for this product, the names are RHT03 DHT22 AM2302. So, be noted that you are using the same product.
    I have asked our engineer to recheck if RHT03/DHTT22 could work under 3.3V DC this morning, the answer is RHT03/DHT22 could work properly under power supply of 3.3V DC.
    I think you have to check if the power supply at RHT03’s power pin is >=3.3V DC.

  • Product SEN-10167 | about 3 years ago

    It does’t exsit RHT03 or DHT22 version. RHT03 and DHT22 are two different names for one same product.
    We have three names for this product, the names are RHT03 DHT22 AM2302. So, be noted that you are using the same product.
    I have asked our engineer to recheck if RHT03/DHTT22 could work under 3.3V DC this morning, the answer is RHT03/DHT22 could work properly under power supply of 3.3V DC.
    I think you have to check if the power supply at RHT03’s power pin is >=3.3V DC.

  • Product SEN-10167 | about 3 years ago

    Why not use C51 or AVR microcomputer to collect signal from DHT22, it’s more simple.

  • Product SEN-10167 | about 3 years ago

    Thanks for your kind advice, fellows.

  • Product SEN-10167 | about 3 years ago

    I have modified the spacing to 2.54mm in the datasheet, our engineer overlook this detail, thanks.
    Customers can download new datasheet at
    http://www.humiditycn.com/fl1_1.html
    Regarding the pins, DHT22(RHT03) is designed to be soldered on circuit board, so the pins are flat. Connection with female header was not under considered when our engineer designed DHT22(RHT03).
    So we can’t change the pins now.

  • Product SEN-10167 | about 3 years ago

    I think you have to reset intervals from 1 s to 2 s at least, then it will be all right.

  • Product SEN-10167 | about 3 years ago

    If you want to download better datasheet, please click this website to download
    http://www.humiditycn.com/fl1_1.html
    I have optimized the datasheet. The model RHT03 and DHT22 are for one same product.
    By the way, please buy from Sparkfun.

  • Product SEN-10167 | about 3 years ago

    If you want to download better datasheet, please click this website to download
    http://www.humiditycn.com/fl1_1.html
    I have optimized the datasheet. The model RHT03 and DHT22 are for one same product.
    By the way, please buy from Sparkfun.

  • Product SEN-10167 | about 3 years ago

    Yes, DHT22 could be used outside. But it needs a cover to protect it from rain & exposure to sunshine.

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