writing the code for DHT22 temperature-humidity sensor to arduion code

[sami aldoseri]

Dear Robert

First we would like to thank you for your effort on the projects

and can we get help and support to help to writing the code for DHT22 temperature-humidity sensor to the latest arduion code wiiht ascom driver, and how to connect with ST6128 driver boards

waiting for suppot

best regards
sami

[brownrb]

Hi Sami
I send you PM for this.Basically bad idea. Much cheaper to use DS18B20 probe, just as accurate and less problems. Cannot use humidity, only temperature. Connection to ST6128 is found in firmware file.

Regards
Robert

See zip file for st6128 with DHT22 - only support temperature, ASCOM does NOT support humidity.
I did not test this code as I do not have ST6128 with SHT22

[brownrb]

// Stepper Motor stuff, control pins for ST6128 board
D3 // wire to DIR+
D4 // wire to PUL+
D8 // wire to ENA+

To set step mode and current, you do this by setting jumpers on the ST6128 board itselef - they cannot be changed in software or by application

See pdf

[brownrb]

By way of explanation:
The ASCOM standard for focusers does NOT have any support for humidity, only temperature.

[sami aldoseri]

Dear Robert

thank you for the first reply

can you please guiding me on how to connect the DHT22 with arduion nano !!

regards

[brownrb]

DHT22 has 4 pins,
Looking at the front, left pin is VDD, next pin is DATA and next pin is NULL and right pin is GND
Connect VDD to 5V of Arduino
Connect DATA to D2 of Arduino
Connect GND to GND of Arduino

[sami aldoseri]

Dear Robert

Thank you for your help

Can please tell me do I need to pullup the 4.7K - 10K resistor, that Comes with from the data pin to VCC.

[brownrb]

Pullup resistor is NOT needed with DHT22