Solar Pannel and LiOn or Lipo

[epierre]

@ceech I've ordered the wrong boards so without the solar panel... what should I do to complete the missing here ?

rq: your page https://www.mysensors.org/hardware/ceech is not present anymore in hardware @hek an error ?

[hek]

I asked @ceech to add it to the openhardware.io site instead. Guess he hasn't had time to do it yet.

[epierre]

@epierre said:

@ceech I've ordered the wrong boards so without the solar panel... what should I do to complete the missing here ?

@ceech would adding these on the either ext or batt do the trick enough ?
http://www.ebay.com/itm/5pcs-5V-1A-USB-18650-Lithium-Battery-Charging-Board-Charger-Module-Protection/221533778016?_trksid=p2050601.c100085.m2372&_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20140211132617%26meid%3D3aab1c92f1544168b6c5a3033e5d60fc%26pid%3D100085%26rk%3D2%26rkt%3D4%26mehot%3Dpp%26sd%3D300376371464%26clkid%3D3316748233453320960&_qi=RTM2247626

[epierre]

@ceech should I put the power on Vin / Gnd as I guess ?

I have started graphing the solar / lipo one here:
https://thingspeak.com/channels/89944

[ceech]

@epierre Yes, Vin is the right choice. Nice graphs :)

[epierre]

@ceech actually the Particle Photon is doing less well than yours: https://thingspeak.com/channels/88622

[Mark Swift]

Hello guys,

@ceech

I have a load of the 18650 charging boards with the protection circuit (from Aliexpress). I also have a few 18650 batteries and solar panels hanging around.... Can I use the code above to get readings (batt, solar, charge, pct) or do I need something else?

[ceech]

The code above is for dedicated boards with on-board charger IC. Like the one from the following page:
http://www.ebay.com/itm/331838940273?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1586.l2649

This board uses LTC4079 and has voltage dividers on battery and solar cell connectors. They allow for voltage readings. Current is measured on one of the LTC4079 pins.

[Mark Swift]

HI @ceech

The boards look great, sadly I have a ton of spares around I need to use first. I wondered if the code could be adopted, or if there was perhaps a way to get the readings off the solar input and battery using the 18650 charge module alone...

[ceech]

Of course you can. Use voltage dividers to scale down voltages that you would like to measure if they are above your VCC. And you can also read the current from TP4056 charger board. Tap to Prog pin (pin 2) and measure its voltage. Here is the correlation between voltage and current:
Ibat = (Vprog /Rprog) x 1200
Adapt the above code with your hardware values, current formula and measure away.