Hello,
I have a question about consumption emonTH.
I buy a EmonTH with holder for 2 * 1.5V batteries. I tried new rechargeable batteries.
I put on my emonTH a DHT22 temperature and humidity sensor. But the batteries only live 2-3 days.
I tried to decrease the refresh values every 20mins in the soft emonTH. Cells live about 3 days.
I put in place of the DHT22, the DS18B20 temperature sensor. Batteries live 3-4 days no more.
I tried to feed my emonTH with solar bettery li-poly 5V. Cells live longer but I beyond 5 days with DHT22 or DS18B20.
Did I missed a step configuration soft my emonTH?
What can I do to extend beyond the month of my life baterries?
Thank you for your help.
Re: Electric consumption emonTH
That seems to be very different to what Glyn Hudson found: http://openenergymonitor.blogspot.co.uk/2013/10/emonth-update-software-p...
Which sketch are you using? Have you measured the current? How long do your batteries keep their charge on their own without being used in the emonTH?
I measure a sleep current of 0.42 mA, which should still give a battery life of several months.
Re: Electric consumption emonTH
Hello,
Thank you for your help.
I thought at the beginning that my problem could come from the current discharge of the batteries. But the problem returns with new batteries.
I charge my batteries with a charger "La Cross BC-RS900".
Using a solar baterry li-poly (exposed during the day), I thought compensate using baterry by the module on the USB 5v. But the battery runs out very quickly.
I used one of the last sketch Github (March 2014).
Despites poor quality batteries, the EmonTH should take at least a month before changing the batteries.
I just bought eneloop battery. I will test the difference.
I also install the latest sketch. And I use the 868Mhz frequency every 60s.
Thank you very much.
Re: Electric consumption emonTH
There are 8 sketches currently on GitHub. I have updated my emonTH with the version of the default sketch: emonTH_DHT22_DS18B20.ino (6b0a496e93) and with that I measure a sleep current of 0.14 mA.
You have not measured and told me what is the current that your emonTH consumes, so I cannot know whether the problem is with your emonTH and the sketch, or with your batteries.
Re: Electric consumption emonTH
Hello,
Thank you for your help.
I measured my current, and I was constantly approximately 42mA.
I rechecked my soldering and I noticed a short circuit when I soldered the Ciseco SRF radio module.
Once the problem solved, the current fell below 1 mA.
I think my problem is solved.
Thank you for your help.