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
idea : TTN uno packet generator shield under construction
use case : hard/software testing (is my graph / gateway / dooralarm working? )
2 pos switch - join ABP / OTAA
4 pos switch 1 - single shot / 30 sec / 60 sec / 300 sec interval
4 pos switch 2 - temp (Si7021) / random temp -10 +40 / fake GPS / ACK
red button - single shot
left button - reset
middle button - join
oled 1.3 I2C 128x64 SSH1106
proto uno shield
“For lithium polymer batteries the under-voltage threshold is 3V”
Very good idea.
So I have some of these N-type chassis connectors and one of the RAK antennas so I have a question. This would make an elegant outdoor gateway, the antenna anchored to the roof by the ali base and using the N chassis connector to enter an IP67 enclosure containing my @Charles’s specification Pi-Zero W + RAK831 gateway. All I need from the inside of the house is power… Result!
My quesiton (to the rf gurus) ; in a perfect world, how do I terminate a co-ax cable (say SMA pigtail) to the back of this N chassis connector without being lossy? Can I carefully ground the shield to the shell exposing as little of the antenna conductor as possible? Any hints?
sure…
1- buy a complete assembly with quality cable 
(they are not expensive)
2- not all enclosures are metal … some are painted aluminium / plastic
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