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13 votes
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Would RPI 3 serve as IoT server with MQTT?

A Raspberry Pi 3 is a pretty serious bit of kit when you think about it Quad core Arm Cortex 1gb of RAM a onboard GPU That is a huge amount of memory, easily more than enough to run a MQTT broker ...
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9 votes

LoRa - Creating a personal network to track cars

Yes, using LoRa radios to receive messages is possible. For the Arduino platform, the LMIC library can be used. See my code for mobile node with gps and gateway. The gateway publishes data to a ...
9 votes

MTAC-LORA-H-868: Can I use without an antenna?

These are mainly very general answers that apply to all receiver/transmitters not just the LoRa gateway. As a rule you should not run transmitters with out an antenna attached (or a dummy load) as ...
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7 votes
Accepted

What is the maximum Packet Size of a LoraWan including the phy headers

How big is a LoRa packet including PHY headers I assume you mean MAC header? After some LoRa chip has demodulated the LoRa radio signals for you, it will give you the LoRa PHY payload. For a LoRaWAN ...
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7 votes
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Is it possible to share an Application between two or more LoRa Gateways using TTN?

Indeed, the whole point of "The Things Network" (TTN) is that multiple LoRa gateways are used to transfer messages between LoRa radio signals and the Internet based routing. And these don't even have ...
7 votes
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Are there any all-in-one chipsets that support LoRaWAN and Sigfox?

The SX127x family of chips from Semtech are modems supporting both LoRa and (G)FSK modulations (including ultra-narrow band FSK). Coupled with a microcontroller implementing the relevant stack(s), ...
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7 votes
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RFM69W and LoraWan

Just to clarify from what I undestand when researching these modules: RFM69x - Packet Radio (not LoRa) RFM96x - LoRa Radio (or RFM95 / RFM97 - thanks Chris) If you're trying to use an RF69x for ...
7 votes
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Is a range of 50 km+ possible in LoRa?

It seems that a range of at least 440 km is possible with the LoRa protocol (i.e. there is no time-of-flight assumption as in GSM). The correct way to answer this question is by looking at the link ...
7 votes
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Is it a good option to send images over LoRa network?

Using the information in this answer: https://iot.stackexchange.com/a/2934/746 At (a worst case) max useable payload of 51bytes it will take 41,120 packets to send a single image (assuming no need ...
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6 votes

Is a range of 50 km+ possible in LoRa?

First, your question is unanswerable by the way as no one could tell what will work in an unknown environment. For example if there is a huge hill between the two modules, or a big city then it won't ...
6 votes
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Increasing the range of an RF module

The data sheet is not too forthcoming on their expectation for connecting an antenna (other than suggesting that a matching network is mandatory if you run high power). However, from the photos in the ...
6 votes
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Arduino LMIC: Figuring out when packet transmission has been started on Chip

LMiC does not tell your code when transmission has started, but you could enable debug logging. When you're transmitting well below duty cycle limitations, then LMiC will often send almost ...
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6 votes
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Using LoRa as a www link

I think you missed how slow LoRa is. It is very, very, very, very slow. The slowest data rate (at SF12, BW125) is just 250 bits per second. That's 31 bytes per second. Just the text of this answer ...
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5 votes
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Spreading Factor of LoRa

The sx1276-series chips don't support spreading factors outside of SF6-SF12 (per sx1276/77/78/79 datasheet). The new sx1262-series chips support SF5 (per sx1261/2 datasheet). With lower spreading ...
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5 votes
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Lo.Ra and Lo.RaWan: Why is a gateway needed?

can't I have "something" that receives the data and sends them over ip-based networks? Yes you can and that's called a gateway. https://www.lora-alliance.org/technology https://www.thethingsnetwork....
5 votes

Is there a way to create WiFi with one Access Point, which should cover a big building?

One Access Point for 250m2 and 3 floors, seems to stretch WiFi a bit. It depends on the material in the building, surrounding interference and antenna. To give a answer, one should do a survey and ...
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5 votes

How to link LoRaWAN Server with WSO2 IoT through MQTT

WSO2 IoT server itself can be used for your purpose without a problem. You don't need to integrate lorawan-server and use WSO2 server as a MQTT broker here. I was able to successfully try out their ...
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5 votes

LoRaWAN collision and demodulation

Lora’s spreading and frequency chirps provide some level of de-confliction, but it’s not perfect. Lora devices transmit randomly on their own schedule, so there’s always the possibility of collision. ...
5 votes
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LoRaWAN collision and demodulation

I am trying to answer all your questions one after the other below. In what scenario is it possible that collision happens between two packets. If at the location of the receiver the signal of two ...
5 votes
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LoRaWAN roaming for overlapping networks

LoRaWAN has a feature called "macro-diversity", which allows more than one GW to demodulate the same uplink frame (UL). Multiple gateways receiving the same UL increases network resiliency ...
4 votes

LoRa - Creating a personal network to track cars

Yes, it is possible. A common way to do this is to have a powered node that can receive data over LoRa and transmit it using ethernet or Wi-Fi to a cloud service. That means that whenever your mobile ...
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4 votes

How to link LoRaWAN Server with WSO2 IoT through MQTT

Like stated in answer of your previous question How can I interface a LoraWan network with MQTT? about MQTT and LoraWan, one device can be member in both, but both sides do not have to know about ...
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4 votes

Is a range of 50 km+ possible in LoRa?

Try a Yagi antenna. Both receiver and transmitter will need an antenna, and they must be aligned with each other (direct line of sight). Just a few degrees of inaccuracy will cause bad reception. ...
4 votes

MTAC-LORA-H-868: Can I use without an antenna?

Formally, you should indeed have a matched antenna when operating a radio transmitter, and antenna matching is indeed frequency dependent. That said, (permissible unlicensed) LoRa RF power levels are ...
4 votes
Accepted

Lo.RaWAN: Why a network server is needed?

It wouldn't be much of a Wide Area Network (WAN) if you just had a single gateway. While you can certainly have nodes report into a single gateway, the more expansive schemes (for example, The Things ...
4 votes
Accepted

Using television Yagi antenna on a public homemade LoraWan gateway

A Yagi (and most TV) antennas are VERY directional, they achieve their good range by making sure they direct all energy in one direction. You would only be able to communicate with devices that are on ...
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4 votes

The Things Network - Pricing

Yes it's free. The idea is similar to the original Internet model, if you set up a gateway you allow others to use it as well and in return you can use other peoples gateways, that way the overall ...
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4 votes
Accepted

The Things Network AWS IoT integration

First of all, trying to launch the integration from an SSH session is a bad idea (it is missing environment variables among other things). With the old version of the integration (before 2.0.11), we ...
4 votes

Is it a good option to send images over LoRa network?

I think your best bet at these distances is a GSM modem with a SIM card and a data plan with the cheapest available operator. You can connect the GSM modem to whatever device is taking pictures via a ...
4 votes
Accepted

(Re)Joining existing Lora-wan end-devices to another network server

Unfortunatelly, the LoRaWAN 1.0.x spec does not define any standard way for having end-devices rejoin the same or another LoRaWAN network and generate new session keys. This is a big operation issue. ...

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