New gateway from Laird: Sentrius RG1XX


(Everhamme) #173

I just put together a Laird RG191 in an outdoor enclosure with mostly everything to get the job done. Of course the antenna cable and ethernet cable lengths are customized for the site! Including links for easy purchase from US based vendors… none of these are affiliate links btw…

I welcome any comments!

Not included in the list: board standoffs… mounting pole…

Make Model Desc Cost Tax Shippping Link
Laird RG191 Gateway 915 MHz 250.00 15.00 8.99 https://www.digikey.com/products/en?keywords=laird%20rg191
Polycase ML-70F15 Enclosure 43.56 2.61 14 https://www.polycase.com/ml-70f-15
Polycase ML-70k Mounting Plate 13.37 0.80 0 https://www.polycase.com/ml-70k
Anvision AV-PS12 POE Splitter 12v 6.75 0.41 0 https://www.amazon.com/gp/product/B01K4R6FQG
Anvision XA-PSE4805-4 POE 1A Power 13.99 0.84 0 https://www.amazon.com/gp/product/B071QZL54F
Altelix AX400- 50ft 400 Low Loss 50 ft 49.99 3.00 0 https://www.amazon.com/gp/product/B071NMVSMD
DHT RP-SMA-N Bulkhead Pigtail 6.50 0.39 0 https://www.amazon.com/gp/product/B00COXHLEY
Altelix Radome Ant. 900 MHz Antenna 37.99 2.28 0 https://www.amazon.com/gp/product/B07DHVXRRN
Proxicast Lightnint Lightin Arrestor 24.95 1.50 0 https://www.amazon.com/gp/product/B01IFV7QXY
Qooltek ST-NET Lightin Arrestor 13.98 0.84 0 https://www.amazon.com/gp/product/B00UYXRDU
Shinekee 200ft Ethernet Cable 69.59 4.18 0 https://www.amazon.com/gp/product/B07FTJK3ZN
Heyco M3234GBJ Cord Grip 3.23 0.19 10 Mouser
Total 533.90 32.04 22.99
Grand Total 588.93

20190130_081134


(Everhamme) #174

Back to my original question… what wattage panels are you using? I know all the factors involved. Just asking what worked for you. Thanks!


(Jeff Uk) #175

1 x 25w worked fine for peak summer 24/7 but knew not viable for days drawing in so added 2nd panel in parallel vs changing up. Deep winter on unsupervised site with snow & leaf load not enough. 2x battery capacity with 50w seems ok given visible horizon not clear & minor obstructions at some times of day with low sun. Should mount panel higher to avoid issue at that site but host felt too obtrusive. Have other configs in prep which I will do report back on over next 4 seasons.

See also earlier post wrt typical 24hr consumption…note this will vary by backhaul method (wifi/enet) & volume of traffic + mix of upload/download packets


(Everhamme) #176

Thanks that’s not bad!


(Everhamme) #177

Here’s the right part for the cable gland https://www.mouser.com/ProductDetail/Heyco/M3234GBH


(Everhamme) #178

I checked and my laird gateway draws 3 to 5 watts. So about 250mA continuously. I could get away with 50 watts of solar in the summer but need about 100 watts to make it year round.


(Reinier van der Lee) #179

Like @Jeff-UK, I found that the RG-191 works with 5V supply. That gives you the option to work with lower solar power.


(Jeff Uk) #180

Indeed - I often run from 5V USB power banks (2A enabled output safest to allow for inrush and Tx bursts) for pop-up gateways at test sites or temp/test deployments, whilst surveying etc. Safest if running at higher end of USB 5V spec also, and also need to be wary of the one ‘gotcha’ which is that when applying such low voltages the dV/dT of the supply ramp needs to be high enough to avoid being trapped by the devices brown-out protection circuitry, otherwise the device powers up in a basic fashion but without effective reset and initialisation, esp of the LoRa side. I find switching the supply in via a relay, or if the USB power bank has a manual ‘on’ switch (even if electronic) use that and you should be fine. Once supply is above approx 7/7.5v it doesn’t seem to be an issue (haven’t had time/run enough tests to determine precise cut off level for brown-out circumvention). Ironically if you put a decent sized capacitor in the supply line to help filter noise and provide some buffer for RF Tx bursts this can make matter worse by effectively slowing the ramp of the supply line…spent weeks last summer trying to trouble shoot that one with 1st Solar tests…Dhoh! :wink: