Help with TX RX Temp Unit Please

[Enamul]

Hi Stuart,
You can start reading my following thread if you already not gone through. Here I have shown how to use the sensor. If you manage to use the DHT sensor and the code. I will post code how to send data to RX.
http://www.matrixmultimedia.com/mmforum ... =7&t=11555

[Enamul]

Hi Stuart,
Did you manged to test the code attached in the link I have posted for DHT11?

[acestu]

Hi Enamul,

I have been busy putting together your DHT-11 circuit, and Wow it worked first time, I must be improving, anyway here it is:

http://www.youtube.com/watch?v=M6fabSeBmLU


Thanks
Acestu

[medelec35]

Well done Stuart.

Its nice when things go well and work the first time.

Martin

[acestu]

Hi Martin,

Hope your OK, Yes things are starting to fall in place more now and I am finding it easier to build the circuits....

thanks
Acestu

[Enamul]

Great! Glad to know that you managed to sort. So now you can add tx program with that. I'll post program with DHT11. By the way which chip you are using for DHT11?

[acestu]

Hi Enamul

The chip is the 877A

Thanks
Acestu

[Enamul]

Fine. In that case it will be easy for me. so I will post program for 16f877a

[Enamul]

Hi Stuart,
Here is the DHT11 code with Tx enabled. In this code Tx transistor is controller by RC1 and data out is RC0 as PORTB is busy with LCD.
Please let me know if you are not clear.

[Enamul]

Hi
Now the RX also changed as we are getting directly temperature value and we don't need to manipulate that in RX. I have modified the RX code and here it is..

[acestu]

Hi Enamul,

another first time worker:

http://www.youtube.com/watch?v=RrfJOBWSQN0


Could I get rid of the LCD on the TX side and send the Relative Humidity to the receiver as well as the Temp ?

Thanks
Acestu

[Enamul]

Great!
One option is just don't connect LCD in TX or I can remove LCD from code but I need to send humidity so it's better I will post new code for both Tx and RX.

[acestu]

Hi Enamul,

Oh that would be brilliant

Thanks
Acestu

[Enamul]

Hi

Here is the TX and RX code and you will see Temp and Humidity alternatively in the RX display. I kept LCD in Tx here to make sure program is working. If you conform that the code is working I will post code of Tx without LCD.

[Enamul]

Hi

Here is the Tx code without LCD. But I feel you should at least have two LEDs in the TX circuit to show you whether that circuit working OK or not. I put two LEDs in the code one is in PORTB0 and other in PORTB1. RB<0> is ON if there is no DHT11 sensor and RB<1> will ON if there is error in data transmission. It's upto you whether you want to use those or not. But I feel it would be better to have those to trouble shoot.

[acestu]

Hi Enamul,

The Temp and Humidity seem to be mixed up as I get Temp 48 and Relative Humidity 24

Apart from that it changes from temp to RH every 6 seconds...

thanks
Acestu

EDIT: I won't use your no lcd code yet until you say its ok

[Enamul]

The Temp and Humidity seem to be mixed up as I get Temp 48 and Relative Humidity 24

Can you please post a video to have look what's going wrong?

Apart from that it changes from temp to RH every 6 seconds...

That's what I did..that is OK

[acestu]

Hi Enamul,

That's weird, it has gone ok now, all is good

http://www.youtube.com/watch?v=CpG7KFg5Oa0

thanks
Acestu

[acestu]

Hi Enamul,

Can i use the no lcd code now ?

thanks
Acestu

[Enamul]

Yes, of course. That's ready to use. Just I want to make sure that previous one is working. If you want to show both Temp Humidity in LCD simultaneously please let me know. I can change the code to have that.

[acestu]

Hi Enamul,

No what you have done the alternating temp and RH is a great idea and I will put the led's on too...

Thanks
Acestu

[Enamul]

That's fine. Let me know or better to have a video link. I really like your this idea