[Jim Moore]

@shannon I noticed that the specs for the Hydros 21 indicate 4.0 volts minimum.  The junper on the Mayfly board is set for 3.3 V.  Would you recomend changeing that to 5.0 Volts?

[Jim Moore]

Thanks!  I’ll plug that into my code.

-jim

[Jim Moore]

@shannon I am setting up a new sensor station using the hydros 21 (due in tommorow) but I am not using the turbidity sensor.  I deleted that section of the code but I wanted to add the humidity sensor.  What do I need to put in the variable list?  Here is what I have:

Variable* variableList[] = {
new MeterHydros21_Cond(&hydros),
new MeterHydros21_Depth(&hydros),
new MeterHydros21_Temp(&hydros),
new MaximDS3231_Temp(&ds3231),
new ProcessorStats_Battery(&mcuBoard),
new ProcessorStats_Battery(&mcuBoard), //dummy var as place holder for humidity
// new SensirionSHT4x_Humidity(), //use “humidity” variable; get error
new Modem_SignalPercent(&modem),
};

The modem is communicating with the new sensor site ok

What else am I missing?

Thanks

[Jim Moore]

Some LiPo batteries have the JST connector reversed and that may be your problem.  Check the battery with a VOM to make sure the red wire is + and black is –

[Jim Moore]

@shicks.  I tested the converters you recommended and they appear to work as expected:

dropout voltage is 8 Volts and will support input voltage to 31.5 V (max on my bench PS).

No load draw is 3.64 mA at 12 V and 2.83 mA at 31.5 V.

A lower cost option is a three terminal non-isolated converter at $2.76 ea vs $12 for the PlusRoc.

[Jim Moore]

Thanks!  I just ordered two.  My four port sampler project uses 12V motors which draw about 0.4A so I guess that would be an option to use the 12V output and LiPo 3.7V batteries.

I assume this converter uses switching so it should be reasonably efficient.  I’ll le you know how they work.  Good old amazon – I should get them tomorrow!

[Jim Moore]

Hi @shicks  I got my 5 pack of the v1.1 boards today and I noticed that:

• Removed External/Lipo slide switch since it’s no longer needed

Does that mean I can no longer power the Mayfly from a 12 V supply?  I have an application for water sampling and the pumps run on 12V and they are controlled by the Mayfly so I can power the whole system with a 12V utility lead acid m/c battery.

[Jim Moore]

It may be that MMW doesn’t like the underscore.  I had a similar problem when I used # in the name of my stations.

[Jim Moore]

@shicks

I emailed the sketch and the associate pio .ini file.

Thanks for looking into this.

[Jim Moore]

I assume that the NeoSWSerial function is needed. to talk to the sim7080 and that is why I am not getting any response from the modem

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