James_NZ

Thanks Neil.

I contacted the NZ branch of SApply and they have around 40 in stock, but that’s it for a while.  It sounds like it’s related to the issues that are plaguing the semiconductor supply chain at the moment.

James

I had a lightbulb moment today that seems to have fixed my problem.  I switched the 3.3v jumper to 5v.  Success!!  I guess it was brown-out.

James

I have switched my pin for the HYDROS 21 CTD from D7 to D11, but I seem to be having the same issue.  It’s worth noting that I don’t get -9999 values when plugged into my computer.  Could it have something to do with power?

My code is b…[Read more]

Hi Shannon,

Yes I am on D7 for the CTD. I am using the default pins for the mayfly modbus wing (https://github.com/EnviroDIY/Mayfly-Modbus-Wing/tree/master/Modbus-Mayfly_WingShield):

Communication is hardwired to Mayfly digital pins 5 & 6, which enable use of the AltSoftSerial library.
Read more at our Notes on Arduino Streams and Software…

[Read more]

Hi Matt,

This is an old thread but I have recently purchased ten Y511-A sensors from Yosemitech.

My contact is called Zoe “sunxian@yosemitech.com”.

HTH

James

Thanks Anthony! I’m feeling a lot more comfortable about Yosemitech sensors now that I have a test unit in my hands. I can’t wait to get them out in the field.

James

Also, for anyone who is interested.  My solution to testing multiple TTL-RS485 adapters with one rig can be seen in the attached photo.

James

Hi @aufdenkampe,

That’s really good news.  Yes I was reading through some historical issues on git-hub about problems with the Polou step-up module and inability to set brush intervals. My 511-A seems to be functioning well so I’m assuming the Polou step-up issue is also solved.

One quick question, In your view, is the 511-A worth the extra…[Read more]

Hi @shicks. Thank you. I was considering pogo pins. I assume you just solder them in and push the adapter board down to test? I guess I could also solder female headers into the wingshield holes and males into the adapter boards. This would allow me to test each adapter board on one rig, and I could just solder the male headers into new wing…[Read more]

Hi Neil,

I’m pretty sure our methods align to that of USGS. However my concern is that the cross-sectional area will change with every large flow event due to the mobile bottom sediments, giving us a poor relationship between depth and flow. Our hydrology team has suggested that an accurate rating curve is very difficult to obtain in such…[Read more]

Just an update here. Katie from METER group thinks the GEN2 will be released within a matter of weeks. She is holding our payment and will send us a shipment of GEN2s when they are available.

James

Thanks Neil.  I have had a skim through the attached document but the flows we are dealing with are in the order of 2-3 m3/sec during baseflow.  We also have another concern because there is sediment clearance in the lower reaches on an annual basis, which again will impact the rating curve.

I think I will have to look for fixed structures, i…[Read more]

Thanks @shicks, great to know. Would you recommend that I push back on them for Gen-2 sensors, even if they take a bit longer to get here? It seems silly to rush things through and end up with an inferior sensor.

James

Hi @dan-wachusett. I am about to order 10 x Hydros 21 units from METER Group. I assume they will be Gen 2 (cost $511 USD each).

Is someone working on the modular sensors library? Any idea how long it will be before the Gen 2 can be used?

James

Another question worth pondering is whether brushed sensors are desirable over un-brushed sensors in lotic environments? Perhaps the difference in performance is more apparent in lentic systems where fouling is more likely to occur?

Has anyone compared the performance of brushed vs un-brushed sensors?

James