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Here is some new data. I had the FTDI cable connected, and seems like it was influencing things somehow. I cut the RX (always high ~ 3.5V) and that changed the way Q1 is turned on. Still not sure why.  I removed the FTDI altogether and repeated the readings.

The Mayfly will now continue oprtsting to V_batt reaches 3.00V, resets when I drop to…[Read more]

So just checking, the Vbat voltage range. I’ve an application that doesn’t have a solar panel.     I’m trying to figure out     1) can a LiSOCl2  3.6V 19Ahr be used  2) 3*D Mn 18Ahr    3) generically characterize  the LiPo measured Voltage,…[Read more]

Hi Sara, any other thoughts on what I can do to troubleshoot this issue?

I’m added a new capability for the Mayfly to program its internal EEPROM with geographical specific pieces of information.
When a site is visited, this will allow the retrieved uSD card to be replaced with a blank uSD card.
https://github.com/neilh10/ModularSensors/wiki/Feature-notes

For multiples sites that don’t have modems, and the readings…[Read more]

I have not, I’m still getting this when I monitor the output:

“Attempting to connect to the internet and synchronize RTC with NIST
Could not connect to internet for clock sync.”

This is exactly what I have for the lib_dep portion of the…[Read more]

@movingplaid   for the basic EC sensor above, and 10bit ADC and running at 2minutes sampling – which is way too fast for a simple DC switched EC sensor got a pretty good result. Graph below.

Next stage is to run it overnight, and for simplicity will graph it on MMW

Hi Robert,  be happy to, and I’ve just finishing up a ModularSensors class.

just thought I had posted here, and it hasn’t shown up, so trying again – here are the core…[Read more]

@neilh20 re: #13915

I had seen that post on the $3 EC meter several months ago and experimented with building a variation of that sensor but had little success.  Thought that it might be better to buy something that already works, to better understand it, an not try to reinvent the wheel.

I would love to see what you come up with for…[Read more]

Hi…i could say about the functionality of the sensor which can help you to choose the one rather than looking for inexpensive sensors.  The current through the liquid will be that voltage divided by the effective total liquid resistance through the hole and back around the outside of the pair of cores. The cylinder inside the cores will…[Read more]

I just added another fix for the XBee wifi and the modem-measured battery voltage.  Have you been able to get it to work for you?

Thanks for the quick reply Shannon,

Good to know, will stay tuned 🙂

good one,

cheers,

Django

We currently only have the option of selling via Amazon and shipping to US customers only, as it is limited by our Amazon seller account. We hope to one day have other options for all the international requests we’ve gotten, but don’t have any other official options right now. Our current Amazon inventory is also dwindling due to all the shi…[Read more]

@chuckkir

Thanks Chuck for getting my Sensorex RTD voltage divider output converted to °C.  I plan to leave the EC as the raw value from the AtlasScientific EZO circuit.  Attached is the code addition to DRWI_CitSci.ino to get the Sensorex probe data published to MonMW:

//==================================================
//   Atlas Scientific EZ…

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