Or make by us a shared spreatsheet on google doc’s and linked to here.
Then a several people off your choise can mantain it.
ok… there have been some initiatives a long time ago, its a full time job, don’t underestimate this.
personally I don’t have much time left (but it could be a one man’s/wowan’s business setting up a site where you can find all commercial professional sensors / gateways /)
If you widen the scope to include lora (and by that I presume you mean point to point LoRa) I would expect a large influx of posts from people\hobbysists wanting advice on how to configure their Arduinos for plain lora applications, that have no connection with TTN.
1 Like
wow that’s a lot of answers, thank you! 
Of course low cost means different values for different people, however, as we all have to think economically usually this means “as low as possible while doing what it’s supposed to do”. I don’t need scientifically accurate temperatures but it should be consistent.
The reason I’m asking is: A while ago we tested CO2 devices from a) Globalsat and b) Zane.hu - the sensors that zane used drift extremely, the Globalsat devices are very consistent. We compared 10 devices each, same location and setup. While drift is expected and in general only a trend canbe meaningfully used, it comes down to the auto calibration they use.
The thing is, if you show both charts to a customer - it’s obvious that he will choose the one where all the measurements are aligned nicely - no matter if this is clever auto calibration, fake data or accurate measurements.
Since the LoRaWan market is quite new, there are huge variances in both price and quality, that’s why I prefer to ask about other experiences before testing.
As @BoRRoZ mentions you cannot sell Arduino/Homebrew/3D printed sensors to cities, no matter how cheap and accurate they are, it’s simply no option.
In the first phase it will be tested with around 20 sensors, expanding to 100-200 at a later stage.
How about this one: https://www.tindie.com/products/edwin/waterproof-battery-powered-lora-sensor-node-lsn50/.It includes 4000mAH battery, programable, use STM32 low power chip, IP65, you can add a SHT20 to it for temperature & humdity. Total cost will be ~$40 for sample (exclude tax,shipping).
It support Cayenne, the manual is here: LSN50 Manual
Well, if you cannot find a suitable ‘low cost’ device that is CE, IP65 etc, its possible there is not one out there.
Maybe the market will have to wait for a low cost device from China that is fake CE …
What is the application, I cannot immediatly think why you would want to measure the outdoor temperature at lots of different locations in a city ?
I’m referring to the context, please can you just stop posting offtopic stuff? Thank you.
@LoRaTracker there are many out there, I’m asking about experience in this thread.
The scenario is the validation of interpolated temperature maps.
Low-cost, IP65 and CE for a low price then you must order a lot.
But a nice sollution you couldThis text will be hidden find on the wall off TheThingsNetwork at the last event. But there is also a link to the market place: https://www.thethingsnetwork.org/marketplace
But on the event I saw several people/companie’s how how sell’s ready to use device’s for in or out site. But the price form ready a IoT device or stille above the 50 - more euro’s.
Maybee look to the product’s off the swiss company Com.T.ac (comtac.com) they make a lot ready to use device’s and all so on custumer order, but within their standaard component’s.
But all so you can wait on the TTN generic node it would be a new proff off consept. https://www.genericnode.com/ or https://thethingsindustries.pr.co/170875-the-generic-node-is-a-disruptive-new-lorawan-device-based-on-the-concept-of-software-defined-iot
Let us hear how your project will grow here or in PM.
Regrads
What about our Cube? It has temperature and humidity sensor on board. It is around 40EUR + case IP65 from GAINTA what we use for another sensor. So it will be about 50EUR per 1 pc.
http://chytra-obec.cz/KETCubeDatasheet.pdf
We have about 100pcs ready to ship.
1 Like
Hi. Have you seen the Sagemcom multi purpose devices? IP65, from a large French manufacturer and Sub 40€
1 Like
Can you provide a link to comtac? The above doesn’t seem to work
A complete, IP65 enclosed sensor, certified costs from 40 EUR upwards… so that would be the better option.
For meaningfull outdoor temperature data not influenced by heating from the sun or building walls, have a look at the MeteoHelix LoRaWAN weather stations.
Take a look at the MeteoHelix LoRaWAN weather stations. https://www.baranidesign.com/meteohelix-pro-weather-station/
Sure, but is only for RH purpose. Our board is mainboard for many extensions boards (1-4x S0, MBUS, MODBUS, PMx, Ultrasound and more will come). RHT sensor is on mainboard. You can take a look here: http://chytra-obec.cz/en/. Btw in 100pc we can reach 40EUR per pcs including box.
Interesting. How long will it run on batteries? If I look at your datasheet is says a week or am I wrong?
Hi @PetervandePol
inside our datasheet is:
Battery Life Recommended battery; RHT
measurement and unconfirmed
LoRa Tx: 1x/30 minutes; Ideal
RF conditions
– 16 – week
= means with CR2450 (coin battery) and with 30minutes interval (50msg per day) you can reach cca 16 weeks (16 units, 1 unit is week). This coin battery has about 500mAh.
So if you will use standard 2400mAh AA lithium battery you can run it for 20 months (almost 2 years with 30 minutes interval). If you will set up interval only 6x per day you can go up to 10 years.
All depends also on SF (data rate), confirmed/uncofirmed message, if your NS support adaptive data rate etc.
If you have other questions, pls let me know - vozak@rvtech.cz . best regards R.V.
Still looking for this sensor? We are in contact with a manufacturer of these devices. If so, reach me at: rolf@onethinx.com
This topic was automatically closed 60 days after the last reply. New replies are no longer allowed.