uhh NO… I didn’t receive the item, but that’s why I’m always confident buying through eBay… within a few days after reclamation they refund you. 
first solar charge 3 x 18650
- update 1
ok it charges / balances the 3 x lipo with a 19v solarpanel connected but… the output is not constant at 12v as I expected (no buck/boost on board) or not working.
I’ve contacted the manufacturer
- update 2
got a factory answer and indeed
this product has no constant voltage out… So no buck/boost.
its a 19v solar 18650 charger/balancer.
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cool !
replacement for the E5573 Mobile WiFi Wireless Hotspot arrived.
the B315s-22 wireless router.
now I can attach antenna’s and I don’t have to use wifi for the gateway connection.
it’s only a little bit bigger
- ordered 1 GB prepaid EU data simkaart 365 days
You might want to look at LTE devices from Mikrotik as well:
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well, I allready bought it (hence the pictures 
)
wifi spots can only communicate over wifi… most don’t have an ethernet port to direct connect your gateway.
so they always use max current
many of them have very limited dashboards settings.
just my 2 cents 
* that last link is interesting
Looking at the projects you are working on, you might find this interesting as well:
typical sundaymorning 
US $5.65 incl. shipping
you could charge a supercapacitor that in turn powers a mini TTN node notifying water is used/running
hmmm… if you make a bigger system and mount that between the watersupply pipe in your house, you generate energy evertime you open a tap or go to the toilet maybe enough to slowly charge a little lion battery …
cleaning my bookmarks I found this retired Sparkfun product Miniature Solar Cell - CPC1822
somebody wrote that it generates a few uA … now with current node consumption getting under 1 uA that maybe interesting again, maybe in combination with a super capacitor to build a lowcost selfpowered thing.
found this alternative :
-
https://www.hackster.io/bobricius/bpw34-solar-supercapacitor-powered-led-watch-1c725b
-
https://hackaday.io/project/21342-bpw34-solar-powered-led-watch
Charging:
Charging is very simple because vinatech scap are 3V, just I use 3V
fixed voltage LDO MCP1700T3002ETT with 10R resistor to limit charging
current + shottky diode
for protection reverse current to LDO … charging voltage drop to
acceptable 2.95V
Discharging:
Heart is fixed 3V version of MAX1724 extremely low 1.5µA quiescent
supply current Step-Up DC-DC Converter which can work until 0.4V imput
voltage
I can use about 87% of stored energy. In all operation time I have
stable 3.001V for MCU.
I also have on board space for newest MAX17222 … 300nA Iqc bu I am
unable to solder 6-Pin μDFN
Average consumption is now about 7uA.
MCU:
I am using PICOPOWER Microchip/ATMEL ATMEGA328 standby consumption with
runing RTC is 0.9uA
if it works for a watch… why not for a node
- instead of the time we need heartbeatrate / temperature / bloodpressure and oxygen level
You could do with a few more adapters on that antenna connection 
yes I know 
but its the standard cable with BNC you get when buying the ‘conrad’ GP and RAK is using the ‘wrong’ connector on their adapterboard…
No reason why not;
If ‘Average consumption is now about 7uA’ you could send around 20 SF7 20 byte packets a day if you dumped the watch functions.
I made a new pcb for the Sensebender to replace the NRF24L01 for a Lora RFRM95 module:
More info Sensebender-Lora
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finally found an affordable waterproof enclosure that fit’s all the components for the mobile gateway build (i’ll hope)
a few of these bad boys as power source
I will use 2 of these enclosures So that the powersource and 4g gateway electronics are separated.
Main use will be ‘field’ experiments and not a selfsustained solar gateway hence the separated
heavy ‘12v - 5v battery pack’… the two units ‘click’ together because inside are strong magnets.
DC-DC 5A Automatically Boost Buck Step Up Down
2S 20A 7.4V 8.4V Lithium Li-ion Charger Protection Board
I did’nt go for that one, but have some TPD laying around … somewere …
power consumption 3g TTN connected HUAWEI B315-22 4g router / wifi off
