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neilh20 started the topic SDI-12 & LT500 in the forum Mayfly Data Logger 3 years, 6 months ago
Hello @srgdamiano
I really appreciate there is a lot of work that has gone into the layers of SDI-12 protocol. I’m using it to communicate with the Insitu LT500. I only have one as they are expensive and its part of a project that can spare it at the moment. With the Arduino-SDI-12 v2.1.3 release the LT500 response has stopped being decoded, b…[Read more]
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neilh20 replied to the topic Bizarre eTape Sensor Behaviour in the forum Environmental Sensors 3 years, 6 months ago
Another low cost depth sensor, showing the problems with using “raw sensing”, and the range is very small range 0-10cm and needs recalibrating evertime there is a power cycle. – https://www.vegetronix.com/Products/AquaPlumb/ – but my experiments have shown it has
My comment “Works pretty nicely, except after power off.
Can’t take power off w…[Read more] -
neilh20 replied to the topic Bizarre eTape Sensor Behaviour in the forum Environmental Sensors 3 years, 6 months ago
Hi James,
If its the standard variable resistance then you should be able to just use the switched 3V. The ADS1115 is going to be more accurate.
FYI in case its of interest, I did some work with it and here is what I found out about the eTape; as I remember with the eTape, was that in calibration it wouldn’t register to the printed zero mark -…[Read more]
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neilh20 replied to the topic Testing power consumption in the forum Mayfly Data Logger 3 years, 7 months ago
@mbarney its a common problem with low power, sleep circuits.
Just to be clear/restate what the issue is. When in “sleep” mode and powered off, all instrument pins (and actually all other processor pins) need to be set to output low, or input with preferably pull down.
On power-up, the pins are activated output and set high within 50mS so as…[Read more]
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neilh20 replied to the topic Testing power consumption in the forum Mayfly Data Logger 3 years, 7 months ago
@mbarney the trace looks good for the waking portion. What I see on my system is that it wakes every minute and then sleeps inbetween. So if you have it on a 15minute setting it will do above, then sleep/wake 14times. The current can be read when it goes to sleep.
For the differential case I would think you would have two sets of dividers. BT…[Read more]
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neilh20 replied to the topic Testing power consumption in the forum Mayfly Data Logger 3 years, 7 months ago
@mbarney an observation, the power is being turned off on the off board ADS1115, but not for the Turner. The ADS1115 Analog inputs are only specified for Vdd+0.3V. If either of the Turners inputs are above this, then it will feed through to the ADS1115 Vdd Sw5V. Probably won’t account for what your are seeing.
I found a I needed to know when i…[Read more]
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neilh20 replied to the topic Testing power consumption in the forum Mayfly Data Logger 3 years, 7 months ago
Gosh @shicks that is great to hear. I wonder would you share how you made the sleep measurements with the microSD present. Any sketches for putting the mega1284 to sleep. Getting to 0.5mA would be fantastic!
Matt Interesting real data with a coulomb counter. Great stuff.
My current measurements on 0.28.01 for sleep are 2.5mA . I haven’t got a…[Read more]
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neilh20 replied to the topic Mayfly low battery voltage readings in the forum Mayfly Data Logger 3 years, 7 months ago
Hi Matt, that’s great it can do the wiper at 3.3V.
I’m using the onboard ADS1115 dedicating AA0 for LiIon battery measurement see photo .
https://github.com/neilh10/ModularSensors/wiki/Hw-Mayfly-ECO-R04 Its using 1Mohms and 100Kohms.
I did initially try 1M and 1M but the ADS1115 still had some voltage offset I couldn’t account for or get rid of…[Read more]
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neilh20 replied to the topic Mayfly low battery voltage readings in the forum Mayfly Data Logger 3 years, 7 months ago
Sorry Matt for the lingo – its hardware speak. 🙂 It was on a number of my boards.!! I now measure the LiIon via the ADS1115 – here is what the two look like in the field.
https://monitormywatershed.org/sites/TUCA-Na13/
Fancy that Turner Turbidity Plus sensor!. Interesting spec, says its supply is 3V-15V, but not clear what the wipe…[Read more]
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neilh20 replied to the topic Battery Capacity /Fuel Gauge in the forum Mayfly Data Logger 3 years, 7 months ago
Just a note, I’ve switched to an STC3100 ” <span class=”fontstyle0″>Battery monitor IC with Coulomb counter</span> “. The LTC2942 became unavailable and turned out to be more expensive.
I’ve got the basic driver here – the device driver reading the registers is here –https://github.com/neilh10/STC3100arduino
A device manager that can provide…[Read more]
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neilh20 replied to the topic Stability Testing ~ how to do it? in the forum Mayfly Data Logger 3 years, 7 months ago
A status for testing with 0.28.01 – after integrating to this release with the SDI-12 bug fixed and then leaving it running for two weeks, using a Verizon LTE CAT-M1 has worked very well. A deliberate characteristic of this test setup was to have a very limited solar aspect a small charge at maximum 0.5A in the morning- but the overall power u…[Read more]
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neilh20 replied to the topic Case for Lower Threshold Voltage on Mayfly Stations in the forum Mayfly Data Logger 3 years, 7 months ago
Jim fascinating, thanks for sharing and been re-reading your document a couple of times.
(I’m redoing my previous post as I got a bit excited with a power discussion).
I use a higher threshold V for transmitting cellular information. The voltage is dependent on the battery type/capacity and the load on the battery.
I use 3.8V as a threshold to…[Read more] -
neilh20 replied to the topic Typical Mayfly Data Usage in the forum Mayfly Data Logger 3 years, 7 months ago
Through Digikey RevX there are some new data plans that cover up to 50MB for $6/month
https://dataplans.digikey.com/
Using Digi LTE CAT-M1 modems, with Verizon SIMS from Digikey, transmitting 8 values, taking readings every 15minutes, and attempting reliable transmission every 2hours, in a riparian valley in a remote area of N California, (so…[Read more]
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neilh20 replied to the topic Reading from EEPROM error in code in the forum Mayfly Data Logger 3 years, 7 months ago
In case its of interest, I’m using the EEPROMClass from EEPROM.h
.platformiopackagesframework-arduino-avrlibrariesEEPROMsrc
<div>
<div> EEPROM.put(EP_PERSISTENT_STORE_ADDR, epc.app); where epc.app is a typedef containing all the values to be stored/read from persistent EEPROM.</div>
</div>
<div>and simi…[Read more] -
neilh20 replied to the topic I2C and power management in the forum Mayfly Data Logger 3 years, 8 months ago
Be interested to hear about the power measurements you make and tradeoffs in power management.
I’m including a Vbat/Coloumb counter monitor with an RS485 wingboard and optionally routing power from the LionBat. It uses the switched 3V3 and the switched 5V – but paying attention to having compatible Ioff when switched off..…[Read more]
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neilh20 replied to the topic I2C and power management in the forum Mayfly Data Logger 3 years, 8 months ago
Hi @mbarney I have come across the I2C issue, and trying to remember what I did, or solution. There was an update that could fix it, but of course that is a fork.
It might have been that a wrongly soldered I2C for a humidity device caused the problem for me. Arduino paradigm is typically normal use cases.
The Mayfly 0.5b has pullups R8 & 10 o…[Read more]
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neilh20 replied to the topic Announcement: New ModularSensors release v0.28.01 in the forum Environmental Sensors 3 years, 8 months ago
I’d like to give my thanks to @srgdamiano for the excellent job in doing releases and also documenting them in different places including the platformio.ini . The git managed source control is core to being able to build reliable loads. Absolutely amazing the distributed gits.
I still don’t quite follow all the release mechanisms, as they area…[Read more]
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neilh20 posted a new activity comment 3 years, 8 months ago
Fascinating the network. Thankyou so much.
I was just wondering if you where planning on describing any of the stations in more detail?.
I’d be interested in how you did the powering, and what was taking the power. Though the whole software architecture of the data flow, (and challenges you found) would be fascinating 🙂 -
neilh20 replied to the topic Transfer file from SD card to iOS/Android via bluetooth in the forum Infrastructure and Equipment 3 years, 8 months ago
found this
http://www.dfrobot.com/product-1073.html TEL0073 Xbee TH BLUETOOTH 4.0 using Ti’s CC2540. Digikey 1738-1014-ND
Seems to me there is a critical power issue; how can a powered BT LE sleeping device plugged into a Mayfly, wake a sleeping Mayfly once a remote BT LE beacon (cell phone) has been detected. For the TEL0073 there is a mappin…[Read more]
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neilh20 replied to the topic Transfer file from SD card to iOS/Android via bluetooth in the forum Infrastructure and Equipment 3 years, 8 months ago
@selbig Wow thanks for sharing that. I’ve been thinking about BT for some time… and hadn’t seen how far it has come. There is also Blue Tooth Commander App for Android – so good for all types.
I’m just wondering how you are powering it.?
On powering, I’m really looking that it needs to be able to use low power, and then turn on when the C…[Read more]
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