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Shannon Hicks replied to the topic Mislabeled grove pins in the forum Mayfly Data Logger 8 years ago
Good find! It’s only the printing on the PC board that is backwards — the actual pin traces follow the standard Grove I2C Pinout: SCL-SDA-Vcc-Gnd (as shown on the schematic). So this shouldn’t be a problem for anyone using a standard Grove cable with connectors on both ends, but if you use one with flying leads or are hacking together your own…[Read more]
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Shannon Hicks replied to the topic Mayfly availability in the forum Mayfly Data Logger 8 years ago
The kits are still in stock, and the single boards should be in stock later this week. More were sent to Amazon last week but their inventory processing has been slowed because of the holidays.
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Shannon Hicks replied to the topic 5-volt boost circuit current capacity in the forum Mayfly Data Logger 8 years ago
You are correct, the 5v boost circuit on the Mayfly v0.4 has a max current supply of 200ma.
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Shannon Hicks replied to the topic Low power project in the forum Mayfly Data Logger 8 years ago
The sleeping sketch I mentioned above works fine as long as you don’t use the SDI12 library at the same time. If you do, there’s some conflicts due to the SDI12 and SODAQ_Pcint libraries looking at the same ports. So I created modified versions of both libraries that fixes the conflict. (This conflict also happens if you use SoftwareSerial and…[Read more]
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Shannon Hicks replied to the topic Solar Power Voltage Limit in the forum Mayfly Data Logger 8 years ago
“20V-1A” is just the rating of the protection diode on the PC board. When choosing a solar panel for the Mayfly, you should only connect ones that are listed as 6 volt panels, and do not use a 9-volt or 12-volt panel.
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Shannon Hicks posted a new activity comment 8 years, 1 months ago
I originally built this in 2011 using an Arduino Pro board from Sparkfun and a standard 2×16 LCD with a LCD-SPI backpack interface from Adafruit. I used a clear enclosure because we wanted to be able to show people what’s inside, but the case isn’t waterproof so using it in the field isn’t a good idea. Now I make them using the Mayfly and a the…[Read more]
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Shannon Hicks replied to the topic Battery Power Options in the forum Mayfly Data Logger 8 years, 1 months ago
The charging circuitry on the Mayfly isn’t capable of charging 2 parallel battery packs simultaneously, so it’s not advised to connect two packs to the Mayfly if you ever connect a mucroUSB cable or solar panel to it because either of those will start the charging process.
The second LIPO connector on the Mayfly is for providing a direct…[Read more]
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Shannon Hicks posted a new activity comment 8 years, 1 months ago
I’ll be at the AGU meeting on Wednesday thru Friday. I’m also giving a presentation on Friday morning about EnviroDIY and our citizen science and education efforts.
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Shannon Hicks posted a new activity comment 8 years, 1 months ago
If you’re using CTD-10 sensors, you’ll need a way to connect their 3.5mm stereo plug to your Mega. Once you’ve done that, the code is pretty straightforward. I recently posted an example sketch (http://envirodiy.org/topic/arduino-datalogger/#post-1834) that polls 6 different Decagon 5TM soil moisture sensors that are all connected to the same…[Read more]
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Shannon Hicks replied to the topic Arduino datalogger in the forum Other Data Loggers 8 years, 1 months ago
The sample code above will not work properly until you’ve correctly changed the channel number for each of the 6 sensors. Also, once you do that and you have a different number of sensors other than 6, you’ll need to change the number in line 31 to the correct number of sensors.
So first you should make sure you change the channel number of one…[Read more]
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Shannon Hicks replied to the topic Mayfly logger in Europe? in the forum Mayfly Data Logger 8 years, 1 months ago
It’s not currently available in Europe, but we’re working on it!
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Shannon Hicks replied to the topic Mayfly Operating Temperature Limits in the forum Mayfly Data Logger 8 years, 1 months ago
The circuit components are rated to the industrial temperature range of -40C to +85C, but I think at extreme temperatures you’re more likely to encounter problems with your battery rather than the Mayfly circuit. LiPo batteries don’t perform well at either really cold or really hot temperatures, so you might consider a different type of battery…[Read more]
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Shannon Hicks replied to the topic Arduino datalogger in the forum Other Data Loggers 8 years, 1 months ago
Here’s some sample code for running 6 Decagon 5TM probes with a standard Uno board. It could be modified by changing the pin number for the LED, in the example below I used the default pin 13 for the onboard LED. Mayfly users would want to select either 8 or 9. I usually prefer to do long-time recording with a separate real-time-clock module…[Read more]
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Shannon Hicks replied to the topic Arduino datalogger in the forum Other Data Loggers 8 years, 1 months ago
You’re going to need to connect the sensors one at a time to the Arduino board in order to program the address. Then you’ll need to hook them all together to the same bus. For example, all 6 of the sensor power wires need to go to the Vcc power bus, all 6 of the sensor ground wires need to go to the board GROUND, and all 6 of the sensor data…[Read more]
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Shannon Hicks posted a new activity comment 8 years, 1 months ago
Wiring the sensor to the Arduino board is fairly simple, just connect the SDI12 sensor data line to a free data pin (like D7), connect the sensor power wire to Vcc, and sensor ground to GND. Then just use the sample code provided with the SDI12 library to poll the sensor for data and/or change the channel number. To use a pushbutton on the box…[Read more]
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Shannon, I would love a copy of your example code for both SDI12 and serial for the Decagon sensors. I’ve got several CTD-10’s that I”m including in a wireless sensor network and would like to use them with an Arduino Mega, but we haven’t worked with SDI12 yet. Thus the code would be greatly appreciated.
Thanks,
Stephanie-
If you’re using CTD-10 sensors, you’ll need a way to connect their 3.5mm stereo plug to your Mega. Once you’ve done that, the code is pretty straightforward. I recently posted an example sketch (http://envirodiy.org/topic/arduino-datalogger/#post-1834) that polls 6 different Decagon 5TM soil moisture sensors that are all connected to the same…[Read more]
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Shannon Hicks replied to the topic Arduino datalogger in the forum Other Data Loggers 8 years, 1 months ago
I’ve connected 15 of the Decagon 5TM sensors to one Mayfly board before, so it’s no problem to connect 6 to a Duemilanove. You’ll need to figure out how to get them all wired to the board, and that depends on what type of termination is on the ends of the sensors. Do your 5TM probes have the 3.5mm stereo headphone-type jack on the ends, or are…[Read more]
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Shannon Hicks replied to the topic Arduino datalogger in the forum Other Data Loggers 8 years, 1 months ago
Did you use the “Address Change” example included with the SDI12 library to give each sensor a unique address? Decagon 5TM sensors are always set to default address “0” when you first use them, so you’ll need to select new ones. I’d suggest something sequential like 1, 2, 3, etc so that it’s easy to cycle through them in the sampling code. How…[Read more]
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Shannon Hicks replied to the topic Water level monitor with a Mayfly. in the forum Mayfly Data Logger 8 years, 1 months ago
ArnoudC, the second half of the Ultrasonic sensor example now has sample code for recording the data to a memory card and also puts the logger to sleep between readings.
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Shannon Hicks replied to the topic Low power project in the forum Mayfly Data Logger 8 years, 1 months ago
For anyone interested in putting their Mayfly to sleep between sensor readings, I recently posted this Sleeping Mayfly Logger example sketch:
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Shannon Hicks replied to the topic Arduino datalogger in the forum Other Data Loggers 8 years, 1 months ago
Different types of SDI12 sensors have different commands for taking measurements and retrieving data from the sensor, so the Arduino code has to be modified for whatever specific sensor you’re using. Plus if you’re using multiple sensors, they each have to be pre-programmed with a unique address, which you then call separately in the Arduino…[Read more]
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Thanks for the reference, I’ll look you up. I haven’t got a ticket yet as its out my pocket
Tere is a Tue 6:30pm-8:30 networking http://thrivingearthexchange.org/fall-meeting-2016/
that I’m thinking of but sounds like that will be before you get there.