Universal wireless sensor board w/NRF24l01+ and ESP8266 socket - ceech board

[epierre]

@ceech I have an issue on a board (lipo+solar) where when I put the programmer it works, when I remove it and leave it on battery it doesn't... battery is 94%, I checked sensors get the energy.. but no more radio it seems, an idea ?

[ceech]

@epierre It is probably a loose contact on the battery connector. Try using a multimeter and check the important connections.

[epierre]

@ceech can you point me to the wirings ? thanks,

[ceech]

@epierre Which board are you using?

[epierre]

on this one this is the lipo+solar.

On the other thread, I mistakenly ordered the "standard" version through mysensor website, and had no time till now to test this out... so bard both weren't proposed...

[ceech]

@epierre The battery is connected with the marked trace:

It goes to the switch an over to the voltage regulator:

You should measure battery voltage along those lines with respect to the GND. On the other side of the voltage regulator there should be 3V3.

On the side note -- you can use those boards that you've mentioned on the other thread to charge the battery. No problem.

[epierre]

@ceech said:

along those lines with respect to the GND. On the other side of the voltage regulator there should be 3V3.

thanks, but I should not have mixed both, my issue is with the other one.

[ceech]

@epierre The one with LTC4067 or the one with LTC4079? It's probably the one with LTC4067.
Here, this is the battery path to the charger:

and then to the voltage regulator:

[epierre]

on the LCT4067, I have 4.17 , on the battery, VCC/GND gives 1.608, same on programmer pin. But this is correct with the programmer, so I get I have an issue from the battery circuit voltage transformation.

on the standard one LTC4079, voltages are correct, 4.17 on Vin/GND, 3.3 on VCC/GND

[ceech]

@epierre It's either the LTC4067, or the voltage regulator. Can you send me the board back?
I'll repair it and send you back.

[epierre]

@ceech said:

. Can you send me the board back?
I'll repair it and send you back.

hello fine, also I wanted to try the thermopile so there will be more on return ;-)

In the meanwhile, how can I have my solar panel on the LTC4079 ? can the lithium charger do the trick ?

Thanks,

[ceech]

@epierre I've received the board and repaired it. I had to replace the battery management IC. The LTC4067. The output was fried. I also replaced the voltage regulator while I was at it.

[epierre]

@ceech said:

had to replace the battery management IC. The LTC4067. The output was fried. I also replaced the voltage regulator while I was at it.

@ceech thanks a lot, any idea why this would happen ?

what kind of bluetooth module are you using ? I've managed nothing good with the HC-05, maybe faulty hard to know.

[ceech]

There are current limiters on input and output side. So short circuit is out of the question. Maybe overvoltage on the input side.
Yes, that's HC-05. Just use it as a serial monitor. It's the same.

[nunver]

@ceech for the solar panel and lipo version, could you let me know what type of battery and panel I shoulld buy? Also, is there a tutorial for usage of that version? I am new in solar panel and cahrging batteries. Thanks

[ceech]

@nunver The best solar panel is the one with voltages between 5 and 12 volts. And the board is set for a standard 3.7V Li-ion single cell battery. I've just updated the board with a DC-DC buck-boost converter which works below and above battery voltage. There is also plenty of other information on the following page:

http://www.ebay.com/itm/331800929918?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1586.l2649

[epierre]

@ceech what did you use for soldering, I cannot see it myself (sure I have a lot to learn for SMD soldering...

[ceech]

@epierre I normally use a reflow oven and in your case I had to use a heat gun.