HCZ-J3A HUMIDITY SENSOR - help needed with programming

[Mothrat]

HCZ-J3A HUMIDITY SENSOR

I'm trying to build a project green house controller using a HCZ-J3A HUMIDITY SENSOR, i've been searching through lots of code for this but i'm having problems finding c code that works. Admittedly i will probably have to do some tweaking, but the only code i seem to come across is the SHT11 for an 80c51 chip which doesn;t really help. Can anyone point me in the right direction?

Mothrat

 

[wp100]

Re: HCZ-J3A HUMIDITY SENSOR

Hi,

Have never seen any good code for that type of sensor, plus you do need some extra hardware, usually a 555 to drive it before you input it to the pic, although there are some designs that use a just a cap and resistor but think they leave a bit to be desired.

Have used a SHT10 which is available cheaply here.
**broken link removed**
It also has the temp inbuilt so its just one unit to use, but I've used assembler not C

An easier alternative might be one of these ready make temp and humidity modules that output data on a simple serial link.
Someone I know has used this one ok.
**broken link removed**

If like me you do not like going out all the time to check things for £8 you can add the Sparkfun 433mhz tx and rx units seen working below.

 

[Mothrat]

Re: HCZ-J3A HUMIDITY SENSOR

Thanks for the links, it may transpire that i will have to use one of those. in regard to the sht10 is it possible to use C code when using it as opposed to assembler as that's what we're being asked to program with.
i've found a lot of coding for the SHT11 but i'm not using a serial port or any sort of communication, it's more for sitting directly on the board (realism isn;t particularly an issue).

Thanks for the help.
Dave

 

[wp100]

Re: HCZ-J3A HUMIDITY SENSOR

Hi,

There is some C code on Sensirons site that does all the SHT sensors and think you will find some if you search this forum or the electro - tech site as well.

The comms I was refering to on those other pre made boards was just a simple data steam straight into the pics usart pin - not a full blown comms set up.
The data comes in as a ready to use temp and humidity value so minimum proccessing is needed, unlike the SHT sensors which need some heavy coding, although they seem to work well once running.