@BoRRoZ, I think I missed one important information how consumption can be can be 35mA ? RFM95 datasheet says (several so not sure what the real value)
One page => 120mA
Another One => 90mA
If I understand what you’re writing, does this mean Lora never use PA_BOOST?
I use LTC3105 for solar controller (because need small device and panel ~ 40x15 mm)
Real consumption for RF part ~ 80mA and small battery + supercap provide 2-3 seconds to transmitte. Device size ~ 35x20 mm with sensors, gps.
@charles : True I made a mistake, but we should transmit at 14 dB max in EU, so around 30mA I assume. I will record it after my holydays, I only checked standby current to be sure that the module enters in sleep mode.
@x893 : nice ! Did you post some data somewhere about them ? Which duty cycle ? I wanted to try a supercap only…
@Oliv
oh yes 14dB max, that’s the trick, and so why it’s limited to ~30ma 
which in fact is perfect for me, got a node that can’t go over 90mA
thanks for sharing
received the board and a little disapointement is, that the LiPo connector is 0.1" which is not standard for all my batteries I have.
That should be corrected or at leased two solder holes added.
I would also like 2 solder points/holes close to the micro-usb as input from the solar panel
otherwise the board is of high quality!
still searching for the optimal combination for a small sensornode , and its a sunny day yeah !!
wow … an 18650 with a real capacity of more then 3100 mAh
(discharged for > 3 hours @ 1 Ah to 3V)
one of the best i’ve seen : panasonic NCR 18650B (used in el. cigarettes)
Guys,
I mounted R-Divider breakout board, time to get some code working, but ready to measure from any 3.3V CPU with I2C and no descent Analog input, ohh, did I say ESP8266 ?
Here are picture, as you can see, seems PCBs.io silk is much better now, really close to OSHPark
Assembled
I’ve just put 1% 1M+1M Resistors and 100nF filtering, so we divide input voltage by 2 (so up to 6.6V input)
Assembled and stacked with ADS1115
@BoRRoZ
It’s just a R-Divider (if you already have Analog input on device) and if not (like ESP8266) you can stack it with ADS1115 board (I2C 4 ADC inputs) like below. You can see github readme for more information
You can find this ADS1115 board (new version smaller) on ebay for less than $3
ah ok tnx 
and you know… not all LiPo’s are equal - never believe what’s printed on them
Hey, yeah I know that, how do you find the real value, you count time to fully charged to discharge at specific AMP ?
yes , I have 2 possibillities, the Maynuo M9812 electronic load and the Turnigy Accucell 6
The Maynuo have a special battery testfunction and can, when connected to PC spit out information/graphs
You set the end voltage (normal between 2.75 and 3.2 V depends on the buildin protection circuit/datasheet)
and you set the discharge current (between 0.2 and 1 C)
then push start and go do the dishes/do some shopping and when reached the end voltage it stops discharging and give you the mAh.
what I really need is a logging power tool… like Ladyada
have been busy finding a diy solution
just curious, did you ever measure the cheap ‘action’ 2000mah AA powerbase batteries?
no, have been testing chinese Ultrafires … that’s really crap
oh, and how bad was it? 
More or less like this, he has the same cheap charger/discharger, they work really good !
I mounted it on an old PC power supply
I have a clone I think, anyway, if you connect them with an old PC powersupply you can do many things.
a very nice menu option is ‘storage mode’, the charger checks the lipo and if its full it start discharging to 70%, if its empty it starts charging to 70%.
one thing you must watch:
If you set it to LiPo discharge, it stops (preprogrammed) @ 3.2 V
What I do, i discharge LiPo with NimH selected , there I can set amps and voltage, so I set that to 2.8 V, then I know its really empty.
Then I set it back to LiPo and charge (it stops preprogrammed @ 4.2 v and when the current is < 0.01 A
Now you can read on the display the real capacity.
To spare your battery’s discharge @ 0.2 C and wait 10 minutes between discharging and charging.
always be extra carefull when charging LiPo batteries !
these panels get… hot
I’m experimenting with a solar panel & supercaps.
The start looks promissing, but the main challenge is the power consumption of the LoraWan communication with the 3.3V RN2483.
The delay of the gateways is a problem for me because I live in the center of large white spot on the map in the Netherlands without existing coverage from TTN gateways. But better to wait and receive a solid product.
In case you want to check or add some suggestions, the URL is:
Best regards,
Peter
