neilh

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]

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]

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]

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]

@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]

Hi @selbig an interesting idea.

I’ve been thinking about unattended access (of just equipment monitoring) and BT (low power) would be pretty nice. However as you are seeing there is a lot of complexity and some history with BT protocol versions that makes a simple concept a bit challenging.  Sounds like for some reason BT is not associating with…[Read more]

Hi Sara, the short answer is no.

I’ve had some other urgent issues that have come up, and so have had to leave it for a while.   In my test bench trial above over a couple of days with 2minute sleep/wake  – 3 runs from reset – all failed after #1~5hrs #2 4.5+7.5 #3-4Hrs – so something happening after 100+ sleep/wake events.

Its seems like it m…[Read more]

In order to check if the Vcc is causing the Xbee S6B WiFi modem a problem, I’ve put together a separate regulator based on the TCR3DF335,LM which regulates to 3.35V and can pulse to 400mA, with a normal spec of 300mA. The S6B spec is for 3.14-3.46V . The TCR3D  fits on a SC74 prototyping board with 1uF decoupling.

SMT is so nice when you have…[Read more]

I’m testing the stability of the Mayfly with the Digi WiFi S6B with software using the 0.27.5 base., running off the LiPo battery.

Some of the the WiFi S6B hybrids initially connect to the WiFi network, get NIST time, and then later after a couple of cycles of sleeping/waking will no longer connect to the wifi. I’ve connected a Salaea Logic…[Read more]

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]

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]

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]

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]

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]

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]

Continuing some ideas on https://www.envirodiy.org/topic/battery-capacity-fuel-gauge