DHT22 Sensor with a Duex5
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I am attempting to configure a DHT22 sensor (this model: https://www.amazon.com/gp/product/B01N9BA0O4/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1), and I also have a Duex5 attached to my Duet Wifi. By my understanding, the data pin on the sensor should be attached to pin CS6, i.e. the E3 endstop line. So I have made a connector that plugs into the E3 endstop slot on the Duex5, where I am pulling both a positive voltage and ground for the sensor in addition to connecting the data line. With this setup, I have had no luck getting the sensor to work in DWC; it always shows 2000 degrees and 2000% for humidity.
I am setting up the sensor as follows:
M305 P103 X400 T22 S"Chamber Temperature"
M305 P104 X401 T22 S"Chamber Humidity [%]"I am running firmware 2.0(RTOS)RC5 with wifi server version 1.21.
I have verified the module does work on its own using a Raspberry Pi. I have tried using both 3.3 and 5 volts for the endstop power on the Duex5, with no change in the results. I have verified the connections from the Duex5 to the sensor using a multimeter. I have tried a basically blank config.g file with only the preamble setting up the network and the gcode lines I gave above to configure the sensors, and I had no luck there either.
Is there something I am missing here? I am wondering if the fact I have a Duex5 attached is somehow blocking the CS6 pin to be used for this.
Thanks for your help!
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That's not going to work, because the E3 endstop input on the DueX5 is not routed to CS6. Pick up CS6 on the SPI daughter board header on the DueX5 instead.
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Thanks, that did the trick! I'm sorry, I misunderstood the documentation on the gcode page (it states "(was E3 Endstop on the expansion header)"). I can see now after looking at the pinout table how I incorrectly interpreted that.
