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  Gustavo Coelho became a registered member 4 days ago

  

  Gustavo Coelho

  @gcoelho

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  neilh20 replied to the topic XBee Networks of Mayfly Loggers – 900Mhz in the forum Mayfly Data Logger 5 days, 19 hours ago

  Hey thanks for the overview. Welcome to the art of jumping in – and learning by doing (my philosophy though I’m an EE graduate) – though its beneficial to bring an engineering basis to analyzing the components, and then plug the components together.  The engineering basis can be thought of as a technical story – though for EE graduates we talk…[Read more]
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  Braedon replied to the topic XBee Networks of Mayfly Loggers – 900Mhz in the forum Mayfly Data Logger 5 days, 20 hours ago

  I am very new to the world of electronics and circuit boards. I am a graduate student of civil engineering looking to deploy snow sensing stations using the Mayfly. They will be satellite stations around an existing piece of infrastructure that already has radio communication set up with Campbell Scientific data loggers. I don’t think the network…[Read more]
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  Braedon replied to the topic XBee Networks of Mayfly Loggers – 900Mhz in the forum Mayfly Data Logger 5 days, 22 hours ago

  Okay, so this is what I have now for my sender code:

  #include <Wire.h>
  #include "Sodaq_DS3231.h"
  
  void setup() 
  {
    pinMode(18, OUTPUT);
    digitalWrite(18, HIGH);
    Serial1.begin(9600);
    Wire.begin();
    rtc.begin();
    delay(3000);
  }
  
  void loop() 
  {
    digitalWrite(8, HIGH);
    rtc.convertTemperature();
    
    Serial1.print(rtc.getTemperature());…

  [Read more]
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  Shannon Hicks replied to the topic XBee Networks of Mayfly Loggers – 900Mhz in the forum Mayfly Data Logger 6 days, 15 hours 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]
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  neilh20 replied to the topic XBee Networks of Mayfly Loggers – 900Mhz in the forum Mayfly Data Logger 6 days, 16 hours 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]
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  Braedon replied to the topic XBee Networks of Mayfly Loggers – 900Mhz in the forum Mayfly Data Logger 6 days, 18 hours 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]
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  Shannon Hicks replied to the topic Mayfly v1.1 technical questions forum thread in the forum Mayfly Data Logger 6 days, 19 hours 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]
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  dan@wachusett replied to the topic Modbus communications on Keller CTD Sensor in the forum Environmental Sensors 6 days, 20 hours 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]
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  Braedon replied to the topic Mayfly v1.1 technical questions forum thread in the forum Mayfly Data Logger 6 days, 21 hours 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]
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