Hi All,
Looking at this DHT22 temperature and humidity sensor - see below.
Product:
learn.adafruit.com/downloads/pdf/dht.pdf
Aurduino Library:
arduino.cc/playground/Main/DHT11Lib
Would it be possible to connect this to my VM110N and read both the temperature and humidity? Can I code VB or VBA to read the values via the VM110N?
Thanks in advance…
[quote=“7heaven”]Hi All,
Looking at this DHT22 temperature and humidity sensor - see below.
Product:
learn.adafruit.com/downloads/pdf/dht.pdf
Aurduino Library:
arduino.cc/playground/Main/DHT11Lib
Would it be possible to connect this to my VM110N and read both the temperature and humidity? Can I code VB or VBA to read the values via the VM110N?
Thanks in advance…[/quote]
No, without modification to the VM110N board AND a custom firmware programmed into its PIC, you will not be able to use this sensor.
As per the documentation, the sensor’s “data” line must be connected to an I/O pin that is used for both, sending the “start” signal (output mode pulled low for 500µs) as well as input mode to receive the response from the sensor. The stock VM110N has all pins fixed as either input or output. Even if you would create a circuit that splits this into multiple input output pins for the VM110N, the USB message latency will not allow you to read the input fast enough to get that message. As said, you would need to modify the firmware for that and let the PIC handle all the timing, then send the complete result in one HID report to the PC.
Regards,
Jan