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  Shannon Hicks replied to the topic Hologram monthly bill in the forum Miscellaneous 2 years ago

  I think you might be mistaking the monthly fee with the initial $20 auto-pay amount they charge to maintain a positive balance in your prepaid account.  The typical plan we recommend is the Maker Flexible plan, which is $0.60 per month (whether you use the card or not) and then $0.40 per MB of actual data usage.  Most of our loggers (when t…[Read more]
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  TUBearRiver started the topic Hologram monthly bill in the forum Miscellaneous 2 years ago

  We have recently set up our first Mayfly system and really love it so far. For the cell phone service we signed up with Hologram and have a monthly bill of $20. Does this sound about right? Has anyone had experience pausing the service while the system is removed for the winter season?
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  Shannon Hicks replied to the topic PAR issue with Mayfly in the forum Mayfly Data Logger 2 years ago

  Which hardware version of the Mayfly board are you using this sketch on?
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  Dan replied to the topic PAR issue with Mayfly in the forum Mayfly Data Logger 2 years ago

  Shannon,

  As you suggested, I tested a duplicate of our set up in the lab and used a power supply source set at 1.5V in the aa0 and aa1 ports used to measure PAR on the mayfly. I get 93 mV and 470 umol for PAR. Clearly wrong. It appears the bits are recorded wrong or they are converted to mV incorrectly.  Any thoughts on a next step to…[Read more]
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  Dave replied to the topic DF Robot KIT0139 Level Sensor in the forum Environmental Sensors 2 years ago

  Hi Neil

  Thanks for the feedback. So I guess a separate sensor housed in the same box as the mkr1400 would be useful. That’s on the (long) list of improvements!

  I’ll post some actual data from the piezometer in the next couple of weeks.

  Cheers
  Dave

   

   

   
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  neilh20 replied to the topic DF Robot KIT0139 Level Sensor in the forum Environmental Sensors 2 years ago

  Hello Dave, thanks for sharing.

  I had thought of getting the device, because of the price, so interesting.

  The issues I saw is that it has two sources of analog error and unquantified temperature coeffocient  for each source of error.

  Every “analog” device typically has a temperature dependency, This would be the depth sensor itself, which…[Read more]
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  Dave started the topic DF Robot KIT0139 Level Sensor in the forum Environmental Sensors 2 years ago

  Hello

  I thought I would share my experience of using the DF robot gravity industrial level sensor (KIT 0139), as there have been a few posts about it.

  I’ve connected this to an Arduino MKR1400 GSM board via an ADS1115 16-bit ADC.

  The results initially were stable enough. I put the sensor in a covered bucket of water (static level) and checked…[Read more]
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  Dan replied to the topic PAR issue with Mayfly in the forum Mayfly Data Logger 2 years ago

  Shannon

  I’ll give your suggestions a shot and see if we learn anything.

  Thanks for the quick reply.

   
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  Dawn replied to the topic Mayfly v1.1 technical questions forum thread in the forum Mayfly Data Logger 2 years ago

  It was ExFAT formatted, now FAT32 formatted and working! It’s great when the fix is so easy. Thank you!
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  Shannon Hicks replied to the topic Mayfly v1.1 technical questions forum thread in the forum Mayfly Data Logger 2 years ago

  As long as the cards are formatted for FAT32 and you can read/write to them with other Mayfly boards or Windows devices, then it’s possible the on-board memory card socket on that Mayfly is broken.  Is this a brand new board that you’re using a card in for the first time?  If you’ve got an EnviroDIY vertical microSD adapter you could try putting t…[Read more]
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