Cannot connect to Hc2a-s RH probe

[charl1e]

Hi,
I cannot connect ot the Hc2a-S probe either using Putty or simple serial read via labview. I connected to the sensor using the process and settings outlined in https://blog.rotronic.com/2014/07/22/technical-note-1-digital-integration-of-rotronic-devices/ Tried sending a simple read data cmd {b01RDD} via putty. But there is no response. The same when I tried to do send the same cmd via labview's serial read-write control object. Has anyone used this probe? Or did someone encounter a similar issue?

Thank you,
Charlie

[KeiBock]

Hi Charlie

Im not sure if your command string has a typo, but it should be { 01RDD}. And you need to bee sure, that 01 is the right address of the probe.
As a command I would send { 99RDD}. Since 99 is the broadcast address on which all devices answer, you ensure that the probe answers if it recieves the command.

Regards

[KeiBock]

No, the probe returns the data in ASCII code. Withe the serial settings in Putty, it should display correctly

[charl1e]

Thanks KeiBock! I got it to work with Putty. Will give my labview script a try.
Regards,
Charlie

[charl1e]

Got it to work in Labview as well. Thanks again KeiBock

[jeffreestar]

Consult online resources: Search for forums or communities where others have discussed similar issues with HC2A-S probes.

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