💬 Minimal LiPo powered Arduino Pro Mini + RFM95 MySensors node
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@evb said in 💬 Minimal LiPo powered Arduino Pro Mini + RFM95 MySensors node:
Thanks for the dimensions :-)
That will work in my setup!I have read also these links with results much better then my 133µA.
I have tested my pro mini with the lowpower sketch to get the pro mini in deep sleep and I measure 133µA. My multimeter is already 30 years old and his last calibration was 20 years ago? But the voltage measurements are still correct, so I don't know...
LowpowerLab has a Current Sense Amplifier device, but for 141 euros it is bit expensive ;-)You didn't mention where you did buy your Pro Mini's? I'm thinking about the quality of the used electronics...
@evb I don't have a specific source for my Pro Minis. Some are from Ali, some from Ebay international - I don't even know which one is from where. I just keep sure to always order the same layout/design, as can be seen in the photos.
Also, when the regulator and LED are removed, there is not that much left besides the ATMega328 itself, is there? Some resonators, but not any questionable parts AFAICS.
Perhaps you should really give another multimeter a try?@Joost I measured the current with another, even older, analog type of multimeter, a type where you need to read the needle using an integrated mirror :-)
It is measuring approximately the same deep sleep current: 141µAMaybe the two multimeters are not correct, but they all give the same order of magnitude.
Next weekend, I will redo a measuring:
- a new Pro Mini + sketch deepsleep from lowpowerlab
- the same Pro Mini without the power led + sketch deepsleep from lowpowerlab
- the same Pro Mini without the power led and regulator + sketch deepsleep from lowpowerlab
To be continued
PS: @Joost, did you see my message about your breakout pcb to be able to order it via openhardware.io?
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@Joost I measured the current with another, even older, analog type of multimeter, a type where you need to read the needle using an integrated mirror :-)
It is measuring approximately the same deep sleep current: 141µAMaybe the two multimeters are not correct, but they all give the same order of magnitude.
Next weekend, I will redo a measuring:
- a new Pro Mini + sketch deepsleep from lowpowerlab
- the same Pro Mini without the power led + sketch deepsleep from lowpowerlab
- the same Pro Mini without the power led and regulator + sketch deepsleep from lowpowerlab
To be continued
PS: @Joost, did you see my message about your breakout pcb to be able to order it via openhardware.io?
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Hi @chey, no, with the pro minis and MySensors lib I couldn't get less.
Didn't measure with yet another multimeter though...My battery sensors are working now for about a year and the battery levels are between 65% and 70%.
The sensor furthest from the gateway is at 65% and the 3 others at 70%.
Not bad I think.
https://forum.mysensors.org/topic/11499/checking-mechanical-locked-doors-by-a-battery-based-windows-door-sensor-node