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Shannon Hicks replied to the topic XBee Networks of Mayfly Loggers – 900Mhz in the forum Mayfly Data Logger 9 hours, 7 minutes ago
The Bee socket of the Mayfly board isn’t powered continuously by default, so in your code examples above, it appears that you’re not turning them on. If you study the schematic for whichever hardware version of the Mayfly you have, you’ll see that you either have to activate the power to the bee socket’s regulator by setting Mayfly pin D18 high…[Read more]
neilh20 replied to the topic XBee Networks of Mayfly Loggers – 900Mhz in the forum Mayfly Data Logger 9 hours, 32 minutes ago
Gosh Brandon, I successfully used the 900Mhz modules about 15years ago with the TinyOS framework.
Seems you are thinking of using it in a Peer-2-peer arrangement, possibly in a mesh configuration. A lot of options.
I wonder what your back ground is – cause its sort of like jumping into the deep end, and you may wanna flesh out your plan – what…[Read more]
Braedon replied to the topic XBee Networks of Mayfly Loggers – 900Mhz in the forum Mayfly Data Logger 12 hours, 14 minutes ago
Hello, I am new to using Mayflies and XBee modules, so I’m hoping I can get some help here since the modules I’m planning on using are the 900 MHz XBee Pro S3B. Programming the modules correctly in the XTCU is something I don’t entirely grasp, but for the moment I will focus on programming the Mayfly.
Right now I am just trying to get two…[Read more]
Shannon Hicks replied to the topic Mayfly v1.1 technical questions forum thread in the forum Mayfly Data Logger 12 hours, 43 minutes ago
The ADC example I linked above from Sparkfun applies only to the onboard 10-bit ADC of the ATmega1284 processor. For the ADS1115 auxiliary ADC on the Mayfly board, the formula on the Sparkfun page does not apply, because the ADS1115 is a dedicated ADC chip and works differently. The operational specs of the chip are outlined in the TI d…[Read more]
dan@wachusett replied to the topic Modbus communications on Keller CTD Sensor in the forum Environmental Sensors 13 hours, 24 minutes ago
@neilh20
Yes, I did get the Keller CTD. We had the budget and I was able to get an extra Hydros21 to deploy while figure out the Keller CTD. It took me a while to get the parts for the Modbus Wing shield and then build it, but I finally got them and had time to do it… so now I am in the thick of it.
I did follow instructions from the post you…[Read more]
Braedon replied to the topic Mayfly v1.1 technical questions forum thread in the forum Mayfly Data Logger 14 hours, 30 minutes ago
I am confused on how we get the 0.1875 conversion factor for the 16-bit ADC. Does it operate on a different voltage? In my mind, if the board operates at 3.3 volts and there are 65,535 bits, then you would be multiplying the analog reading by 3300 mV / 65,535 bits, which is 0.050 mV / bit.
I’m asking because I am looking at connecting two apogee…[Read more]
neilh20 replied to the topic SDI-12 Slave in the forum Other Data Loggers 1 day, 7 hours ago
Hi @dani68k, welcome to EnviroDIY.
I’ve not got any experience on the ATmega32u4, and as a small AVR processor I would think you would need to customize your development for it. SDI-12 bit banging is very sensitive (unrelaible) if the timing isn’t configured right. Possibly using the USART would be better for timeing, but configuring that is…[Read more]
neilh20 replied to the topic Systems not recognized from 12th( v0.15.0?) in the forum Monitor My Watershed 1 day, 8 hours ago
Thanks to @ptomasula for fixing https://github.com/ODM2/ODM2DataSharingPortal/issues/658
If I understand it right, the internal redirection for POST to MonitorMyWatershed.org/api/data-stream/ HTTP/1.1 got broken with the upgrade to v0.15.0, and a http response of 301 was returned, which ModularSensors doesn’t handle. Of course its not a good…[Read more]
Shannon Hicks replied to the topic Mayfly v1.1 technical questions forum thread in the forum Mayfly Data Logger 1 day, 12 hours ago
The calculation for the conversion of analog bits to voltage depends on the operational voltage of the system (3.3v in our case) and the resolution of the ADC. You can see an example calculation (and more importantly, the formula used) for a 10-bit Arduino here: https://learn.sparkfun.com/tutorials/analog-to-digital-conversion/all
Braedon replied to the topic Mayfly v1.1 technical questions forum thread in the forum Mayfly Data Logger 1 day, 16 hours ago
Okay, thank you Shannon! I have a follow-up question. So when using the AuxAnalog pins, from my understanding you have to multiply the digital signal by 0.1875 to convert it to a millivolt reading. Would you need to do the same if you were to use the other analog pins (A0, A1, ,etc.), or is the 0.1875 value unique to the ADS1115 ADC?