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neilh started the topic SDI-12 level shifting in the forum Environmental Sensors 10 hours, 33 minutes ago
I was wondering does anybody have a suggestion for a hardware level shifter for the SDI-12 interface and if there are any software mods needed.
I’m interfacing to the LT500 that requires at least +8V, and drives back +5V from the SDI-12 half duplex line.
Right now I’m using a current limiting resistor, but it would be nice to figure out if I can…[Read more]
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James_NZ replied to the topic Solar Panels for Mayfly in the forum Infrastructure and Equipment 1 day, 13 hours ago
Thanks @shicks. COVID has meant that not everything is available at my end of the world, so I need to compromise sometimes!
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Shannon Hicks replied to the topic Solar Panels for Mayfly in the forum Infrastructure and Equipment 1 day, 13 hours ago
That panel wouldn’t be a problem. Any panel that produces 6v will be safe for the Mayfly, but some cheap 6v panels actually produce higher than 6v in direct sun, so you should measure it (under load) in full sun to make sure it won’t output higher than the max input voltage of the MCP73831 (7 volts). The solar charger on the Mayfly boards v…[Read more]
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James_NZ started the topic Solar Panels for Mayfly in the forum Infrastructure and Equipment 1 day, 14 hours ago
Hi,
This might be a stupid question but what solar panels are compatible with the Mayfly? I understand it takes up to 6V input, but am I constrained by wattage as well? Would I risk damaging the system if I installed a 6V 6W panel like…[Read more]
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Matt Barney replied to the topic Hydros-21 Depth Temp Compensation in the forum Environmental Sensors 1 day, 16 hours ago
Hi Dan,
I’m curious whether it’s possible to identify Gen 1 vs Gen 2 Hydros21; are they labeled? I’m wondering what I’ve got.
Thanks,
Matt
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James_NZ replied to the topic Problems with OBS3+ in the forum Environmental Sensors 1 day, 17 hours ago
Thanks @neilh20. I will definitely be interested in these when they are available.
@aufdenkampe do you have any feedback about YOSEMITECH turbidity sensors? My questions are:
1) Are they as reliable as other turbidity sensors, i.e. do they drift more readily, or provide strange values? For $510USD (non-wiper) or $680USD (wiper), they seem…[Read more]
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Shannon Hicks replied to the topic Com Ports not connecting to logger in the forum Mayfly Data Logger 1 day, 18 hours ago
Are you using Windows or Mac for connecting to the Mayfly board? Have you tried more than one USB cable? Are these two unresponsive Mayfly boards brand new or are they running previously-programmed sketches? Are there any LEDs that light up when you power the Mayfly board, either from a USB cable or a LiPo battery pack? Is the small slide swi…[Read more]
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neilh started the topic Sensors using cameras/ML in the forum Environmental Sensors 1 day, 18 hours ago
I wonder if anybody has been thinking/trying low cost cameras as a sensor.?
An email came through this morning https://os.mbed.com/blog/entry/Mbed-and-Arduino-Low-code-development-fo/
With a talk tomorrow Apr 14 (9am PDT?), https://www.youtube.com/watch?v=qflDRYLGuPI
Mbed OS Tech Forum, on Wednesday, 14th April 9am , hosts Alessandro and Do…[Read more]
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Danielle IWI replied to the topic Com Ports not connecting to logger in the forum Mayfly Data Logger 1 day, 19 hours ago
I did forget that there should be a new port number to the logger, but, yes, it is not assigning a COM port number for two of our loggers. Is there any reason why some loggers would be able to be assigned a port while others would not?
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dan@wachusett replied to the topic Hydros-21 Depth Temp Compensation in the forum Environmental Sensors 1 day, 22 hours ago
Hi Scott, I look forward to seeing your test results. Meter Group exchanged my Gen 1 Hydros21 with a brand new Gen2. I am programming it right now and will post new results after I test it. We are gearing up to expand our Mayfly network and I want to make sure we are using a dependable sensor before we purchase several units.
Dan
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neilh replied to the topic Problems with OBS3+ in the forum Environmental Sensors 1 day, 23 hours ago
I’ve been working on a next revision board. Details at https://github.com/neilh10/SensorModbusMaster/tree/release1/hardware/knh002-MayflyWingShield
overview at https://github.com/neilh10/SensorModbusMaster/tree/release1/hardware
I don’t have any time frame on availability due to the world wide shortage of parts, but probably third quarter this…[Read more]
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Shannon Hicks replied to the topic Problems with OBS3+ in the forum Environmental Sensors 2 days, 1 hour ago
Those sensors use Modbus RS485 protocol to communicate with a host device, which the Mayfly logger can’t do natively do with its current hardware, so you’ll need to add either an aftermarket RS485-to-TTL interface board, or build one like Anthony (@aufdenkampe) has done. He, and a few other people on the forum, have deployed some Yosemitech…[Read more]
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James_NZ replied to the topic Problems with OBS3+ in the forum Environmental Sensors 2 days, 6 hours ago
Hi @shicks. I need a number of turbidity sensors for an upcoming project, and I have a reasonable quote from Yosemitech (~510USD each). What additional interface hardware are you referring to for the Yosemitech probes? Has anyone tested them and can vouch for their accuracy?
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JPugh replied to the topic Com Ports not connecting to logger in the forum Mayfly Data Logger 2 days, 12 hours ago
We found that the USB Serial drivers did not install, this is where we found drivers –> D2XX Drivers – FTDI (ftdichip.com)
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JPugh became a registered member 2 days, 12 hours ago
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neilh replied to the topic Stability Testing ~ how to do it? in the forum Mayfly Data Logger 2 days, 22 hours ago
I’ve created a low cost monitoring console using a Raspberry Pi and FTDI cable. This allows a release debug OUTPUT to be monitored just as if it was on the console and compared to https://monitormywatershed.org/
https://github.com/neilh10/ModularSensors/wiki/Test-monitoring-host
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Shannon Hicks replied to the topic Problems with OBS3+ in the forum Environmental Sensors 5 days, 19 hours ago
There’s not a direct replacement for that sensor, meaning one with the same operating specs and output. There are some alternatives, but most are significantly more expensive, or require different interface hardware (like the Yosemitech sensors), or Turner Cyclops sensors (but require user calibration). Unless you need a turbidity sensor i…[Read more]
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Ahsan replied to the topic Problems with OBS3+ in the forum Environmental Sensors 6 days ago
Thanks , can you suggest alternate of any other company having almost same specs
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Shannon Hicks replied to the topic Problems with OBS3+ in the forum Environmental Sensors 6 days ago
Campbell Scientific discontinued the OBB3+ sensor about a year ago. They have new turbidity sensor models in development, but I’ll let them make the announcement about when it will be ready.
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Ahsan replied to the topic Problems with OBS3+ in the forum Environmental Sensors 6 days, 1 hour ago
#jsterling, I am looking for OBS3+ for my pilot project , went to campbell site but it shows discontinued. Can any support to provide source for OBS3+ or its alternate model
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