-
neilh replied to the topic Stability Testing ~ how to do it? in the forum Mayfly Data Logger 2 days, 10 hours ago
I’ve received more “LTE Bee Adapter” cards, and looking to experiment using it to investigate why the Xbee WiFi S6B is not reliably connecting to the local wifi network. https://github.com/neilh10/ModularSensors/issues/21
The LTE Bee Adapter card provides power directly from the LiIon battery, control of the Xbee reset, and potentially also an…[Read more]
-
neilh replied to the topic Stability Testing ~ how to do it? in the forum Mayfly Data Logger 4 days, 6 hours ago
Well after running for some time with the WiFi S6B, and still having problems after it has been running for a couple of hours,
I’ve switched to one my target field internet comms of Digi XBee3 LTE-M over Verizon.Very interesting the Digikey RevXsystems https://dataplans.digikey.com (thanks to @mbarney for the suggestion) has a new low cost…[Read more]
-
neilh replied to the topic Stability Testing ~ how to do it? in the forum Mayfly Data Logger 1 week, 4 days ago
Some status – the periodic Mayfly RESETs turned out, I think, to be happening when polling the Insitu LT500 gauge over SDI12. https://github.com/EnviroDIY/ModularSensors/issues/344
The new code breaks the polling of the Insitu LT500, I’m doing debug under various scenarios to try and under stand it.…[Read more]
-
neilh posted a new activity comment 1 week, 4 days ago
Some status – the periodic resets turned out I think to polling the Insitu LT500 gauge over SDI12. https://github.com/EnviroDIY/ModularSensors/issues/344
The new code breaks the polling of the Insitu LT500, I’m doing debug under various scenarios to try and under stand it.
https://github.com/EnviroDIY/ModularSensors/issues/346I’m seeing…[Read more]
-
neilh started the topic Stability Testing ~ how to do it? in the forum Mayfly Data Logger 3 weeks, 2 days ago
I’m just wondering who might be doing some system stability/reliability testing ? and what their setup is.
By system stability: I define it as test setup representing real world conditions that can exercise a majority of core code.
Traditionally, in open source this is such a sqiggy area, that it requires a community of supporters to exercise…[Read more]
-
Some status – the periodic resets turned out I think to polling the Insitu LT500 gauge over SDI12. https://github.com/EnviroDIY/ModularSensors/issues/344
The new code breaks the polling of the Insitu LT500, I’m doing debug under various scenarios to try and under stand it.
https://github.com/EnviroDIY/ModularSensors/issues/346I’m seeing…[Read more]
-
-
neilh replied to the topic Inexpensive DIY conductivity sensor in the forum Environmental Sensors 1 month ago
The latest release of ModularSensors 0.27.0 has a new simple electrical conductivity sensors ~ AnalogElecConductivity.h/.cpp
Thanks to Sara for accepting it as a MS sensor and formatting it to the latest documentation style. See the amazing Doxygen generated https://envirodiy.github.io/ModularSensors/group__sensor__analog__cond.html
Sara has…[Read more]
-
neilh replied to the topic Battery Capacity /Fuel Gauge in the forum Mayfly Data Logger 1 month, 3 weeks ago
Hi Matt – well been watching the output of the LC709203F with some other testing. It does work for the accurate battery voltage measurement.
However the LC709203F “%” capacity could be challenging to use. There is a lot of technical discussion about battery fuel gauges and what works and doesn’t. Another device that I got was the Seeed LT…[Read more]
-
neilh commented on the post, Evaluating Maxbotix Ultrasonic Sensors for Monitoring Stream Base Flow 1 month, 3 weeks ago
Thankyou so much for doing such detailed work. I’d been thinking of a boom situation for some measurements. However the atmospheric temperature will vary.
-
neilh replied to the topic Sampling frequency for Monitor My Watershed in the forum Monitor My Watershed 1 month, 3 weeks ago
My experience is that its not capable of that.
I have been doing a lot of testing in pushing up readings to test Mayfly reliable data delivery algorithms I have evolved. I have in some cases had 6000 points to push (ie 60days of unreported readings at 15minutes per reading), and MMW has been very slow, often after a small number (~10) of POSTs…[Read more]
-
neilh replied to the topic Monitoring power consumption in the forum Mayfly Data Logger 1 month, 3 weeks ago
Continuing some ideas on https://www.envirodiy.org/topic/battery-capacity-fuel-gauge
-
neilh started the topic Battery Capacity /Fuel Gauge in the forum Mayfly Data Logger 1 month, 3 weeks ago
Just wondering if anybody has looked at algorithms for battery capacity.
For logging reliability, when a LiIon battery is low in available energy, it would be nice to reserve the available energy for just the core logging functions (ie no high powered radio transmission).
I mentioned some work I’m doing in this thread…[Read more]
-
neilh replied to the topic DFRobot Gravity KIT0139 Depth Sensor – Routine Interference? in the forum Environmental Sensors 2 months ago
Hi James, very interesting. I wonder which Analog port on the mayfly you are using, ADS1115.?
One test I do, to verify the sensors response, is put the sensor in a simulated stationery stream, (jug of water) with a solar aspect, stable power supply voltage, and measure water temperature and water temperature together and see what it…[Read more]
-
neilh replied to the topic Rain Gauge Tip Data Without Rain in the forum Mayfly Data Logger 2 months, 2 weeks ago
Hi Brian, You may want to describe the type of tipping bucket and the electrical interface for counting . Some types of relay contacts can oxidize and require a minimum wetting current at some point. Do you have a link for the ProTrinket.? regards
-
neilh replied to the topic Monitoring power consumption in the forum Mayfly Data Logger 2 months, 3 weeks ago
I’m sharing some integration test results. I’ve been using a Vbat=4.0V threshold – that is under Vbat=4.0V it does sensor readings only, and stores the readings for later reliable data delivery.
When the battery voltage is over Vbat=4.0V it POSTs the readings to MMW.…[Read more]
-
neilh started the topic Two depth sensors for reliable depth measurement confidence in the forum Mayfly Data Logger 3 months ago
I’ve released a Mayfly image that interfaces to two depths sensors – an Insitu LT500 and Keller Acculevel – and pushes the readings to MonitorMyWatershed.org over a Digi LTE CAT-M1 modem.
As a binary image, anybody can download it into a Mayfly, no programming experience needed. https://github.com/neilh10/ms_releases
The per station…[Read more]
-
neilh replied to the topic Monitoring power consumption in the forum Mayfly Data Logger 3 months ago
I’ve had a simple system soak testing.
It has an Xbee WiFi, LiIon 500mA, measuring MayflyVbat and ADS1115 extVbat. When the extVat voltage is >=3.85V it will
Logger dataLogger.logDataAndPublish();
and when below <3.85V only
Logger dataLogger.logData();
I’ve used the 3.85 threshold as I found the Mayfly was resetting when the WiFi turned on…[Read more]
-
neilh replied to the topic Battery Measurement accuracy in the forum Mayfly Data Logger 3 months ago
So just to add some more characterization measurements.
I’m using a Mayfly Sn 20395, and attempting to characterize what range the readings from the Mayfly ADC Vbat are linear when it is only powered from Vbat. I’ve put a resistor network on the extV to the LiIon batter, to halve the voltage to keep it within the Vcc range for the ADS1115.…[Read more]
-
neilh replied to the topic Monitoring power consumption in the forum Mayfly Data Logger 3 months, 1 week ago
Hi Matt, power is a challenge. I always think of those battery watches with a tiny battery in them. How do they do it.
My take is this. a) what is the minimum energy its going to collect across the really low solar months eg winter months b) What is the longest I want the system to run for with no solar power – that is usually a storm of some s…[Read more]
-
neilh replied to the topic Monitoring power consumption in the forum Mayfly Data Logger 3 months, 1 week ago
I should note, that for real world solar panels, the power supplied by the panel is dependent on the solar photons received. For a slow change in power delivery some circuits have some strange behaviour. I’ve had a Mayfly with an LTE module, and a 2Ahr battery, and at sunset it started resetting. It continued resetting for about 30minutes unt…[Read more]
-
neilh replied to the topic Monitoring power consumption in the forum Mayfly Data Logger 3 months, 1 week ago
I’ve been using the INA219 and contributed sensorsTINA219
I’ve used it for measuring a working Mayfly on the lab bench. For field monitoring, I would think you need a coloumb counter ~ eg LTC2941 ~ I have an adafruit version but haven’t tried it.On the lab bench I have the INA219 on a separate Mayfly with console and put in in series with the…[Read more]
- Load More