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Shannon Hicks replied to the topic Difficulty connecting to MMW with LTE Adapter in the forum Monitor My Watershed 4 years, 12 months ago
There is no built-in antenna on the Xbee LTE module, or any cell module for that matter. I’ve tried a variety of antennas, this is the one we usually use because it’s cheap and fairly rugged and fits easily inside our enclosures: https://www.digikey.com/products/en?keywords=1837-1003
Just use caution with the u.fl connector, it is not designed…[Read more]
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Shannon Hicks replied to the topic Difficulty connecting to MMW with LTE Adapter in the forum Monitor My Watershed 4 years, 12 months ago
The APN for Hologram is now “hologram” (with a lower case h) so you might try changing your code to that. But I have lots of older modules that have been out for years and still use the old konekt APN (this was Hologram’s old name) so I’m not sure if that’s the issue. Do you have an appropriate LTE antenna connected to the CELL jack (and not the…[Read more]
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Shannon Hicks replied to the topic Analog-to- Digital Converter Port on Mayfly Data Logger in the forum Mayfly Data Logger 5 years ago
Mayfly D22 is not a physical pin on the board, it’s processor pin 22, which means you set it high or low using digitalWrite commands in your sketch, just like you would with pin 8 or 9 to turn the red or green LEDs on or off. If you’re new to Arduino or the Mayfly, you might try working through example sketches or workshop sketches in our Github…[Read more]
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Shannon Hicks replied to the topic Analog-to- Digital Converter Port on Mayfly Data Logger in the forum Mayfly Data Logger 5 years ago
Are you referring to the two Grove ports in the lower left corner of the Mayfly? All of the Grove ports (and the Sw3 and Sw5 pins in the headers) are designed to only be powered when you set pin D22 high. This is so that you can turn any external sensors on or off independently from other things on the Mayfly. Setting D22 high turns on the…[Read more]
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Shannon Hicks replied to the topic Can't read/store values from Yosemitech using WingShield in the forum Mayfly Data Logger 5 years ago
It’s hard to tell exactly what’s going on with your wires from the photo, but you should make sure your separate power supplies are sharing a common ground. If you’ve got 12v going to the sensor and 5v going to the board, you need to have the ground of both of those supplies (or batteries) connected to the same ground as the Mayfly.
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Shannon Hicks replied to the topic Mayfly Stops Logging and Other Issues in the forum Mayfly Data Logger 5 years ago
I edited your original post to put the code into the Code Snippet tool.
I check every one of the Mayfly boards thoroughly before they get sent out to Amazon, so it’s possible that one with an FTDI or USB jack issue slipped by since that’s the only part of it that I don’t check. Send me an email to mayfly@envirodiy.org and I’ll see what I can do…[Read more]
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Shannon Hicks replied to the topic Logging to SD Card More than Two Decimal Places in the forum Mayfly Data Logger 5 years, 1 months ago
I edited your post to move the sketch code into code snippet box. Next time, use the “Add Code Snippet” button at the top of the text editor box when you’re writing a post or comment. It makes it much easier to read, especially for long sketches.
It’s very easy to add an integer or characters to a string, you did it correctly with the line…[Read more]
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Shannon Hicks replied to the topic SDI-12 Change Address for Meter Hydros 21 CTD Sensor in the forum Environmental Sensors 5 years, 1 months ago
The Mayfly logger processor is just like any other Arduino board, and loading sketches onto it is just like any other Arduino board. The uploaded sketch is “burned” into the microprocessor chip in the center of the board. The microSD card slot is just an optional device to allow users to store recorded variables or other data during the…[Read more]
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Shannon Hicks posted a new activity comment 5 years, 1 months ago
It sounds like you’re having issues with not properly declaring the libraries required for the sketch, or not having the libraries installed on your computer. I use the standard Arduino IDE, but Sara (and others) who use Platform IO will need to help you since I’m not as familiar with the library functionality with that software.
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Shannon Hicks replied to the topic SDI-12 Change Address for Meter Hydros 21 CTD Sensor in the forum Environmental Sensors 5 years, 1 months ago
The Mayfly is not designed to have 2 microSD cards inserted at the same time. No one should ever insert two cards. The reason for the second vertical socket is for people who have the logger mounted inside an enclosure that makes it difficult to remove the card in the regular horizontal socket. Various electrical irregularities will occur if…[Read more]
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Shannon Hicks replied to the topic SDI-12 Change Address for Meter Hydros 21 CTD Sensor in the forum Environmental Sensors 5 years, 1 months ago
What you’re describing with the microSD card is definitely not normal. I’ve encountered it only a few other times in over 1000 boards, and it’s usually caused by a bent pin inside the microSD socket that causes a short circuit when a card is inserted. Is this a brand new board? And are you seeing this behavior with the microSD socket that’s…[Read more]
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Shannon Hicks replied to the topic SDI-12 Change Address for Meter Hydros 21 CTD Sensor in the forum Environmental Sensors 5 years, 1 months ago
It sounds like your PC is just not seeing the Mayfly. You should make sure the Mayfly is turned on at the main power switch, and that the small power-select slide switch is set to the USB/Lipo setting (not Ext). Sometimes the switches can be a little glitchy, so you can try sliding them back and forth to make sure they’re getting good contact.…[Read more]
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Shannon Hicks replied to the topic 4G Signal Tester in the forum Mayfly Data Logger 5 years, 2 months ago
The 4G LTE modules we use are brand new and have only been available for a few weeks. I just stocked the LTE bee adapter board in our Amazon storefront last week too, so the materials you need for building the signal tester are so new that I haven’t had a chance to document the building and programming process. I’ll be building a few more once I…[Read more]
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Shannon Hicks posted a new activity comment 5 years, 2 months ago
It’s Ms. Hicks, actually. But the If you want to read an analog signal using one of the two analog Grove sockets on the Mayfly board, they are actually connected to the auxiliary 16-bit A/D converter, which is an ADS1115 chip. You’ll need to use an ADS1115 library, which has the commands you use for reading an analog voltage with any one of the…[Read more]
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Shannon Hicks posted a new activity comment 5 years, 2 months ago
If you use a DS18B20 sensors, it requires a pullup resistor on the data line. You can connect the sensor data line to pin D10 and then just close the solder jumper SJ12 on the back of the Mayfly to enable the builti-in pullup resistor for that data pin. This saves you from having to add a separate resistor somewhere on the board to pullup D10.
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Shannon Hicks replied to the topic PH Sensor Issue in the forum Environmental Sensors 5 years, 2 months ago
The way a voltage divider works is for you to use 2 resistors in series, and then you measure the junction between the two resistors, and you’ll see a fraction of the overall voltage. The best method for breaking a 5v signal down to something the Mayfly can tolerate would be to use two identical value resistors (like 10k-ohms each), so that way…[Read more]
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Shannon Hicks replied to the topic PH Sensor Issue in the forum Environmental Sensors 5 years, 2 months ago
Also, you need to use 3.3 volts as the board voltage in your conversion formula and not 5.0 volts. And if you’re measuring a 50/50 voltage divider, you’ll then need to double the measured voltage to get the true sensor voltage. So:
float voltage = (sensorValue * (3.3 / 1023.0)) * 2.0;
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Shannon Hicks replied to the topic PH Sensor Issue in the forum Environmental Sensors 5 years, 2 months ago
You mean the USB5V on the FTDI header? That’s only used if you’re supplying power to the board via an FTDI adapter when programming. You should definitely be using the SW5 pin for powering a sensor and not using the FTDI header.
What does your resistor divider network look like? What values, and how do you have them connected in relation to…[Read more]
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Shannon Hicks replied to the topic PH Sensor Issue in the forum Environmental Sensors 5 years, 2 months ago
What pin is the sensor getting power from? If it’s the Switched 5v pin (labeled SW5), or from one of the grove terminals (assuming you’ve moved the jumper over to the 5v setting), you still need to switch on the 5V boost regulator by putting this line, preferably in your setup routine:
digitalWrite(22, HIGH);
The 5v boost regulator (as well as…[Read more]
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Shannon Hicks replied to the topic PH Sensor Issue in the forum Environmental Sensors 5 years, 2 months ago
Which analog pins of the Mayfly are you attempting to use to measure the voltage? And can you share the code you’re using to read the voltage?
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