New gateway from Laird: Sentrius RG1XX


Thats had a partial upgrade, kernel and rootfs have gotten out of sync. This may have been due to an upgrade over unstable wifi or network outage.
It is unfortunatly an RMA job, later versions of the firmware dont suffer from this.

(Rserag) #163

Thank you @BWhitten for support. @Jeff-UK thank you too!

(Varun) #164

i have sentrius RG168 gateway EU region if i use in India . Is it illegal ?
What is different b/w RG168 & RG168 m2 ?

(Jeff Uk) #165

Hi Lachlan, agree with you that the Laird RG1xx one of the easiest to set up and run - I can usually get an unboxed assembled unit up and running on E’net connection & registered on TTN in under 4 mins…a Wifi unit might take me 5! :slight_smile: Until last few months it has been one of my favourites and have deployed many for myself and for clients either directly or by recommendation, not least as also a relatively low cost unit, even if its closed/proprietary and not a flexible/open platform in the way say a RPi or embedded PC/Linux based unit can be. As I’m not much of softie or code hacker latter point doesn’t bother me too much and I don’t have to worry about loading images or mitigating potential (u)SD card reliability issues :wink: Support from the Laird team has been good and responsive also and have shared what I hope is useful tech/feature insight that is in part reflected in the GW/Sensor product family.

Interesting to see you have issues with supplied main adapter…that is also a big problem here in the UK - so a heads up for UK users to a deployment problem I have experienced - where EU rules allow suppliers to ship in mains adapters where the pins are not specifically designed for UK traditional 3 Pin socket use.:frowning:

This is typically as supplied:

Which forces the use of one of these to adapt to UK 3 Pin outlet:

Before deploying to the field I usually soak test configured units for at least a few days - and often 1wk to as much as 1month before pushing out the door.

In the office/lab several may be on test at a time:

Late in the summer I had a problem with a deployment in N.East UK where install kept dropping off line…long story short TL::DR…problem turned out to be plug was vertical mount as usual for mains sockets vs office lab testing horizontal:

It turns out that the sideward/vertical load of weight of plug/adapter combined with differences in contact metal shape and area of the various ‘shaver style’ adapters meant that, esp if combined with slightly bent/deformed main adapter pins as seen in photo, a small amount of ‘creep’ was enough to break mains connection causing unit to go off line…a re-seating and holding with tape solved initial problem but it cost 2 day trip to other end of country with attendant costs and opportunity impact + damage to client confidence to get resolved! :frowning: Now have to be very careful what type of adapter used for installs…with another ‘suspect site’ due for a visit shortly!

I flagged this a while ago with Laird tech and prod management teams to give them chance to root problem and source alternate supply for future sales - I have highlighted the slip on style adapters such as used by Lorix, Multitech and others, which allows for various territory support inc EU, UK, US & AU with one unit :slight_smile: I know they are close to finding a sourcing fix hence posting this caution now, after holding back for several weeks as hopefully they will be offering improvement to market shortly :slight_smile: :ok_hand::tada:

In the meantime the last 10 or so gateways I have deployed myself & 40-50+ done by/for clients have been other vendors solutions inc reverting again to some RPi derived platforms…

Hopefully Laird will become a ‘favourite’ once more early in the new year…:thinking:

(Lachlan Etherton) #166

Thank you for the extensive reply mate. Great to hear someone else using these gateways.

Just a couple of things. Do you know what the SD card slot is used for? I can’t seem to find any documentation on it other than a mention of where it is located in the user guide and no forum seems to describe its use.


In addition, other than the power adapter problem, why have you stopped using the gateway and what have you switched to instead? Do these newly chosen gateways provide greater functionality/ features as well? I know that’s quite a few questions, but I am going to be deploying a few gateways and really want to provide the best value for money solution for my clients and seeings as you’ve done quite a few, I might as well ask you.

Keep in touch.

(Jeff Uk) #167

From discussions I have had the SD card slot is not (yet) an end user service item. may get used for future features/capabilities or in connection with cellular upgrades, hence you wont find many references to it other than its location. I’m hopeful it may get s/w update to allow local storage option or for easing s/w updates etc. but don’t hold breath…

For me it all came down to the PSU! I also use these units re-housed in external boxes as proto earlier in the thread, and where PoE or Solar supply used, hence where Laird supply not used/isn’t issue. That one bad example cost £hundreds in direct travel & subsistence costs, plus 2 days eng time plus ‘opportunity cost’ of not doing other things…total £thousands! :frowning: Which totally offset the price benefit seen c/w alternate units, hence decision to (sadly) stop using for basic deployments until Laird supply with pucka UK PSU’s. That said I have clients aware of the issue who are still planning to deploy the Lairds in Q1 where I will be providing training/consulting support - as noted ‘they just work’ :wink:

As called out in other Forum threads there are techniques that can be applied to wear leveling and wear-out mitigation for the uSD cards used on RPi based platforms and others so once they are adopted and applied to standard image builds the on cost isnt huge and card upgrades scheduled in as part of planned s/w updates & maintenance routines (annual/bi-annual) mean risk mitigated in large part. That combined with some newer units and boards that have come to market since the summer has made such units viable and cost effective again. I and clients using a range of alternate gateways that are off the shelf - I’m still experimenting to determine which one I prefer and would like to use going forward. Several vendors have sent me sample units for eval & feedback as part of my consulting activities so wont ‘declare’ yet, though the Multitech & Kerlink production units seem to get good press/feedback, as do the iMST Lite Gateway & RAK Pilots for engineering/test deployments and I really like the look of the pending new Reece Innovation LGW01 for outdoor use, though it was still awaiting approvals when I saw it in October and the guys are late shipping me test/evaluation units for my trials. I have more project time allocated in Jan & Feb for evaluating other suppliers GW’s if/when they decide to ship me units… :slight_smile:

Will post on forum once I finish evals…

(Everhamme) #168

What size is the barrel power connector?

(Jeff Uk) #169

I believe it is a 5.5mm OD (just measured!) 2.1mm ID (for pin), I found from trial and error that was most reliable/snuggest fit with a range I had in stock from configurable PSU’s that this was best fit. 4.75-6mm OD worked for me as did 2.1 & 2.5mm pin - 1.7 was too narrow. YMMV as some barrels as just hollow center and some have flexible blades inside to ensure tolerance & good contact to pin…

(Bryansmith) #170

I questioned the Laird folks about this in regards to software updates out in the field with out internet connectivity, which is a realistic scenario. I didn’t get a favorable answer but I can tell you for a fact that this was supported at one point and if you hack around a bit you can get it to work again.

It’s definitely available from the command line and with a bit of work potentially from the web gui. If you have root access to the device you can upgrade from where ever you’d like. I’ll address this later.

The SD card slot is in use and has been ever since they’ve released this unit. It gets mounted at /media/usb0.

I’ve been planning on releasing a video on how to get root on this device quite easily by using the sdcard. My RG1XX is thoroughly hacked for GPS, VPN, remote logging, ssh, lora-gateway-bridge and various other things. This unit isn’t closed or proprietary really.

(Jeff Uk) #171

Yes please! :slight_smile: …A TTN Lab Story?

(Lachlan Etherton) #172

Second this! Would be great to hear how this is possible!

(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
Polycase ML-70F15 Enclosure 43.56 2.61 14
Polycase ML-70k Mounting Plate 13.37 0.80 0
Anvision AV-PS12 POE Splitter 12v 6.75 0.41 0
Anvision XA-PSE4805-4 POE 1A Power 13.99 0.84 0
Altelix AX400- 50ft 400 Low Loss 50 ft 49.99 3.00 0
DHT RP-SMA-N Bulkhead Pigtail 6.50 0.39 0
Altelix Radome Ant. 900 MHz Antenna 37.99 2.28 0
Proxicast Lightnint Lightin Arrestor 24.95 1.50 0
Qooltek ST-NET Lightin Arrestor 13.98 0.84 0
Shinekee 200ft Ethernet Cable 69.59 4.18 0
Heyco M3234GBJ Cord Grip 3.23 0.19 10 Mouser
Total 533.90 32.04 22.99
Grand Total 588.93


(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

(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:

(DCH Project) #186

Firewall considerations:
Open 1900-1904 when using ttn packet forwarder

From Laird:
"If you are using the TTN gRPC forwarder you should allow 1900-1904 TCP to the server that you are using, TTI/TTN.

No port forwards to the device should be necessary as it establishes outbound connections."