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Questions tagged [lora]

For questions about the low-level LoRa wireless radio modulation. Use a more specific tag when asking about network protocols that are using LoRa, such as DASH7, LoRaWAN, Sigfox and Symphony Link.

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2
votes
1answer
22 views

LoPy4 Gateway (LoRa RAW) connection to Raspberry Pi and AWS Cloud

I am attempting the following setup: Sensor--> I2C--> Pycom LoPy4(Node)-->LoRa-RAW-->Pycom LoPy4(Nano Gateway)-->RPi-->AWS I have established the LoRa RAW connection between the two LoPy4s, now I ...
1
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2answers
37 views

How to encrypt sensor data in low-power wireless communication like LoRa, BLE, …?

Wireless sensors communication have limitation in message size due to low power consumption. Assume that we have a heart rate sensor sending data via BLE, or a GPS data sending via LoRa to a receiver:...
3
votes
1answer
40 views

What is wrong with this MQTT-SN bridge?

I am using this MQTT-SN bridge, with no changes except that I rigged it to give a hex dump of the buffer if it does not contain a valid MQTT-SN packet. I am experiencing a strange problem: sometimes ...
0
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0answers
35 views

Signal Processing in LoRa

I was working with LoRa interfacing with microcontrollers and realized that I'd require encryption of data in my design. Can someone tell me if I would require signal processing for this purpose?
2
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0answers
60 views

LORA VS NRF24L01

I want to chooses between nrf24l01 and lora-ra02 for my smart home project The following parameters are very important to me distance range (covering an area of 400 square meters) Ability to cross ...
2
votes
1answer
53 views

Receiving acknowledgement in LoRaWAN without affecting data transmission

Consider a LoRaWAN in which multiple nodes are attached to gateway. The page at link-labs states that, once a message has been delivered, there is no acknowledgement of receipt. However, nodes in ...
3
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0answers
22 views

Can I send messages from LORIOT to an HTTP web server?

I actually send data packet from LORIOT and TTN to Cayenne. I would understand if is possible to send instead data from Loriot or TTN to my custom http web server, if there is any procedure around ...
1
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1answer
39 views

Can LoRa end points communicate directly?

Can LoRa end points communicate directly? Or is a gateway/network server always required?
6
votes
3answers
651 views

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

LoRa (Long Range) technology is one of the promising technology which offers long range communication with low power consumption. Therefore when building a device that can be deployed in a no ...
3
votes
1answer
135 views

The Things Network AWS IoT integration

I have followed the tutorial for the AWS integration but cannot get the MQTT messages to display in the AWS IoT Core. I assume bridging is not working since I can get the messages in an external ...
2
votes
1answer
716 views

Communicate with MQTT over LoRa

I have two Raspberry Pis with a LoRa module each (Microchip RN2483, connected over serial). How do I tell MQTT (in Python) to use the LoRa motes (/dev/ttyAMC0) instead of Ethernet or Wi-Fi?
3
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1answer
84 views

How does endianness work in LoRaWAN1.1?

On Page 9 in the LoRaWAN 1.1. specification it says: The over-the-air octet order for all multi-octet fields is little endian. EUI are 8 bytes multi-octet fields and are transmitted as little ...
4
votes
1answer
427 views

The Things Network - Pricing

I am planning to use The Things Network for my next project with around 50 LoRa nodes geographically distributed in an area. I am wondering is LoRaWAN free to use - provided we buy LoRaWAN gateway ...
1
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0answers
9 views

Can there be a correlation between Emonlib current increase and RTC unsync on MKR 1300?

I'm having this weird issue where my data Send interval gets screwed up when the monitored current goes above 27A. Basically, it keeps adding several seconds to my interval, here's an example: ...
1
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0answers
58 views

LoRaWAN remote sensor node platform

Which platform can you recommend for a LoRa/LoRaWAN remote sensor node, which fulfills the following criteria? Detects presence of people in 15-minute interval (e.g. with a RCWL-0516) Reports the ...
1
vote
0answers
268 views

How do I send 7Ultrasonic HC-SR04 data from a LoRa node to a LoRa gateway using Arduino?

I am a Master student and in my project I have to collect data from different types of sensors and send it to the cloud, I have done this with the DH11 sensor using existing examples and it worked ...
3
votes
2answers
72 views

How to send data collected by two different sensors simultaneously?

I have two different sensors connected to my Raspberry pi and I have to send the data to other device. The transmission of data is through wireless network. I have been asked to send the data in ...
2
votes
2answers
52 views

LPWAN technology for remote environmental monitoring

What would be the most appropriate LPWAN technologies for environmental monitoring in a remote area, given the following: The monitoring system would be made up of 3 to 10 nodes located within a ...
2
votes
0answers
59 views

LPWAN technologies and Dash7

I need to transfer messages from node to gateway that would be at most 2km apart. I am currently working with 40 nodes that wake up every 1 minute. So I would like to have battery life of at least 3-...
4
votes
2answers
723 views

Using Raspberry Pi as a Lora Node for a TTN setup

I already have a LoRa gateway that I made using a NodeMcu with ESP8266 and now I want to send data from a Raspberry Pi 3 through that gateway to the TTN. The first thing that I did was to connect ...
4
votes
0answers
59 views

Microchip RN2903: TX/RX distance with internal antenna

My question is about the maximum transmission distance achieved with the Microchip SoC RN2903, only using its internal antenna. I've been doing field tests in urban environments, with this module and ...
3
votes
1answer
50 views

Why there is no LPWAN technology in HF or VHF band?

This is a question which I have been wondering ever since I started exploring LPWAN technologies. All the LPWAN technologies I have found (like SigFox, LoRa, Ingenu etc.) work in UHF band (300 - 3,...
4
votes
1answer
222 views

How does LoRa based geolocation work? How does it measure distance?

The speaker in the video Richard Lansdowne - LoRa Geolocation mentions straight-off that he won't be quoting an accuracy for geolocation using LoRa, and it's of course not the ideal signal you would ...
2
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0answers
32 views

How will the Proxima I and II satellites use or test LoRa in space?

IoT Aukland Tweet references FleetSpace and launch of the Proxima I and II satellites. This put's the "W" in LoRaWan in a different perspective. How will these test LoRa in space? Is there any ...
8
votes
2answers
240 views

Suitable wireless technologies for high density industrial IoT

I have a requirement to design M2M communication devices for a factory which has 1000 nodes (machines) within 100m of each other. The devices will be wired to get power and will transmit a payload of ...
1
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1answer
113 views

Connect sx1272 module to a Dragino Gateway

I am new to Lora technology. I am using a sx1272 Lora Module and I am trying to send and receive data to a Dragino Gateway. The problem is the sx1272 and Dragino use two different libraries and hence ...
7
votes
0answers
57 views

Requirement for a mesh network using Zigbee or similar technology

I have a requirement to design a proprietary monitoring system. (There's some intellectual property involved so I'll describe the system with a slightly altered purpose.) Imagine a large factory ...
11
votes
2answers
532 views

Spreading Factor of LoRa

I am new to LoRa technology and I was reading it's technical specifications on the lora-alliance.org website. In the document, the SF is always considered between 7-12. What is the reason behind not ...
5
votes
1answer
2k views

Arduino LMIC: Figuring out when packet transmission has been started on Chip

I use the following example of an ABP-activated LoRaWaN node: https://github.com/matthijskooijman/arduino-lmic/blob/master/examples/ttn-otaa/ttn-otaa.ino But for some reason I cannot figure out when ...
2
votes
0answers
285 views

Semtech Lora Packet forwarder with Dragino Shield: How to configure the pins on packer forwarder?

As far I have seen that these links: USE LORA SHIELD AND RPI TO BUILD A LORAWAN GATEWAY LoRaWAN But they use an obsolete packer forwarder: https://github.com/tftelkamp/single_chan_pkt_fwd as a ...
7
votes
1answer
6k views

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

I created a LoRa to USB pass-through via Arduino in order to use it as a temporary gateway for development purposes. So somehow I need to know how big a LoRa packet including PHY headers is, in order ...
6
votes
1answer
1k views

Using Arduino LoRa with RFM9X chipset: How to connect the RMF9x NSS pin?

As I am searching on libraries that can be used with Lora and arduino I came across on this one: https://github.com/sandeepmistry/arduino-LoRa Also the RFM9x has the following pinout: The data ...
6
votes
2answers
715 views

Using television Yagi antenna on a public homemade LoraWan gateway

I thought it would be nice to setup my own LoraWan public Gateway in order to extend "The Things Network" network. But in order to do that I think that I will need to use a proper antenna in order to ...
7
votes
3answers
106 views

Ultra Low Energy point-to-point protocol choice

I am lost in a forest of IoT protocols and need help. I'm looking for right hardware and protocol for my application. I would like to make a device of my own, but use an existing stack and hopefully ...
3
votes
1answer
315 views

RFM69W and LoraWan

I'm trying to figure out how I will make an RFM69W LoRa Module work with The Things Network, so I looked over many tutorials, code samples, and libraries. The one I find closest to LoRaWan support is: ...
5
votes
1answer
110 views

Lo.Ra and Lo.RaWan: Why is a gateway needed?

As I was looking information regarding Lo.Ra and Lo.RaWAN over these links: http://www.instructables.com/id/Introducing-LoRa-/ https://www.link-labs.com/blog/what-is-lora https://www.quora.com/What-...
4
votes
1answer
109 views

(Multitech mDot + Conduit) mDot keeps dropping connection to network

If anybody has experience the Multitech mDot and Conduit modules to set up a LoRa network I could use their help. I’ve set up a LoRa network consisting of an mDot node (plugged into a Multitech ...
10
votes
3answers
3k views

Is a range of 50 km+ possible in LoRa?

I read this article which said I could get upto 50 km with a LoRa module. But when I read the product description it says the in-built range is only 16 km, so I obviously need an antenna. But what ...
6
votes
1answer
270 views

Increasing the range of an RF module

I am working with a RF-LORA-SO 868Mhz module. I read this article that says the range of this module could go up to 50km. But I would need to connect an antenna to my LoRa module. This article I ...
6
votes
1answer
102 views

Protocol for over 300 metres and minimum of 20 kbytes datarate?

We are trying to choose the most suitable connection protocol for wearable devices, with the following constraints: 300 - 500 devices will simultaneously connect About 1 km2 site area—coverage is ...
8
votes
2answers
725 views

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

I recently received MultiConnect Gateway (GW) + MTAC-LORA-H-868 but the problem is that I didn't receive any antennas. I need to setup LoRa Gateway ASAP. I'm new to LoRa and I have a few questions. ...
5
votes
1answer
123 views

Is it possible to share an Application between two or more LoRa Gateways using TTN?

I have a GPS Tracker application which periodically sends Latitude, Longitude, Altitude to a LoRa Gateway. I am using the The Things Network and sending the data via the OTAA method which provides ...
6
votes
2answers
192 views

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

I need to create a WiFi network(or other types e.g. LoRa) for IoT devices, inside a building. The Building has three floors, each about 250 square meters. The main constraint is that I can't use any ...
8
votes
3answers
1k views

LoRa - Creating a personal network to track cars

So, I have two single channel LoRa/GPS modules and I want to create my own personal network... So I want a module that receives all data from other devices ans sends it to a server with a database.. ...
2
votes
0answers
1k views

How do I get the MAC address of LoRa nodes? [closed]

I have some LoRa nodes (a Dragino LoRa Shield to append an Arduino Uno) and I want to connect them with a Dragino Gateway LG01-P. I need to take the MAC address (unique address) of my nodes but I don'...
6
votes
2answers
181 views

Can I connect my devices to the Cambridge Intelligent City Platform?

According to Cambridge News, a LoRaWAN network has recently been set up in Cambridge for the 'Intelligent City Plaform'—essentially, a smart city platform for IoT devices to sense and influence the ...
7
votes
2answers
2k views

LoRaWAN Multicasting

Is there any real implementation of LoRaWAN multicasting? According to v1.0.2 LoRaWAN specification it is possible to send multicast frames but I have not found neither a node nor a network server for ...
8
votes
2answers
7k views

How can I interface a LoraWan network with MQTT?

I have been working on a project which involves creating a LoraWan network using: Dragino lg01 as a Gateway. An Arduino Uno and a Dragino Lora shield with a simple LM35 Temperature sensor As for the ...
10
votes
2answers
1k views

Configuring LoraWan Gateway

I'm trying to build a LoRaWan Network using a sensor programmable with Arduino and a Dragino Lora Shield. I have found many solutions for creating a gateway, including an Raspberry Pi connected with ...
12
votes
5answers
1k views

Is Bluetooth a good enough protocol for “lost my keys” beacons?

Bluetooth beacons for localizing lost objects are beginning to spread. You can locate them using an app on your smartphone (yes, and create an account, share on facebook your objects, ...) with a ...