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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How LoRaWAN Class C downlinks works?

I am working on implementing a customized LoRa middleware, I am stuck on understanding how switch between classes works in gateway (server) side, for end node it’s clear for example to switch from ...
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What is the "fully independent automatic working mode" of the RFM97CW LoRa module?

I was searching for LoRa transceivers for a project to create a tracking device, and I came across the RFM97CW and RFM95CW, that claim on their product pages to have a "fully independent ...
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2 votes
1 answer
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LoPy4 MQTT Example does not Work

I have two LoPy4 Dev boards. I am using this tutorial in order to (successfully) communicate with the two boards. After receiving data in LoRa communication I am trying to also publish this data in an ...
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Heltec WiFi Lora32 - Can i received LoraWAN packets?

I bought this shield and trying to receive LoraWAN packets in my surrounding. ESP32 Heltec Lora Within their SDK there is examples of receiving data for Lora, joining LoraWAN, however i am interested ...
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Is it possible to run a 12v Nema17 Stepper motor remotely with ESP32 over LORA P2P?

I'm new to this, but I have 2x ESP32 LoRa modules that I want to setup. I want to be able transmit a signal from one ESP32 LoRa module to the other ESP32 LoRa module over LoRa to run a stepper motor ...
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1 answer
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Allowed RF frequencies in UK using RFM69

I am thinking of buying an RFM69HCW FSK module from Adafruit. However I am confused as to which module to buy, the 433 MHz or the 900MHz version. Are both allowed in the UK? If they are then why do ...
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LoRaWAN: What is a safe distance between two end devices using the same spreading factor that makes sure they don't interfere with one another?

I'm working on an algorithm with the help of a simulator that changes how end devices are distributed such that interference between end devices using the same spreading factor is minimized. I'm still ...
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2 votes
2 answers
138 views

LoRaWAN device leaving a network and then coming back... what Join behavior to expect?

For smart-city or industrial campus type of projects, there are devices that leave the network for e.g. 2 days (worker leaving on a week-end), and then come back... but they might remain disconnected ...
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1 answer
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What are the datarate and ADR best practices for moving objects

For static objects, LoRaWAN has a very neat 'Adaptive Datarate (ADR)' feature that is key to the scalability of the protocol, it allows the network server to select the fastest uplink datarate ...
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3 votes
2 answers
81 views

The impact of LoRaWAN repeated transmissions

The LoRaWAN spec defines the LinkADRReq MAC command with a field (NbTrans) specifying the number of requested repeated transmissions of every frame. Actility claims that their ADRv3 algorythm uses ...
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Which radio technology for long distance, high(er) power, IP traffic?

I'm looking to build a long distance IP star network using one of the IoT PHY layers but unsure if LoRa is right. An ideal solution would be something to the effect of 915Mhz WiFi or WiFi HaLow ...
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LoRa inventory application

As far as I know there is no smartphone with Lora builtin compatibility. I'm looking if I can build a inventory solution based on LoRa. Until today the solution was to use the NarrowBand (deprecated ...
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Sending LoRa packets using LoRaWAN sensor device

I would like to measure temperatures using a LoRa device and establish a point-to-point connection with another LoRa compatible device. However, the only appropriate temperature sensors use LoRaWAN, ...
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1 answer
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LoRa point-to-point communication

I would like to create a point-to-point connection between a LoRa temperature sensor and a M5 Stack (ESP32) with LoRa module. However, I am a beginner with LoRa, so I have a few questions: Are all ...
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How to Control electric motor with Lora and microcontroller

The idea is to control a water pump that uses an induction motor. By control I simply mean to turn on and off the motor of the water pump. The setup includes a Lora gateway that transmits the desired ...
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2 votes
2 answers
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Method to send data from a device to a backend

I have tasked myself with building a simple temperature sensor device, using a thermocouple and stm32 microcontroller. I want to be able to take readings at regular intervals (every hour or so) and ...
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How we can interface LoRa(RFM96W) with STM32F030 controller?

I have tested my RF96W LoRa boards with the Lolin Boards, it works fine. However when I interface these Lora boards with a stm32f030r8t6 based controller, I don't receive any data, although I have ...
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Arduino LMIC: GPS Logger - old coordinates stuck in queue

I'm building a LoRaWAN GPS Logger using the Arduino LMIC Library. I've got a running solution which reads GPS coordinates and transmits them via LoRaWAN to TTN. For activation, I'm using OTAA. On TTN, ...
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8 votes
1 answer
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Cannnot send from Arduino to Raspberry pi via LoRa

I am trying to send messages from my Arduino to my Raspberry pi. But I don't understand why the pi isn't receiving the messages. On the Arduino side I'm using an Arduino UNO with a Dragino Lora/GPS ...
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2 votes
1 answer
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Using LoRa as a www link

I am new to IoT and LoRa, and still trying to grasp the scope and capabilities after discovering a whole technology I never knew existed. I have read some about LoRaWan and IoT, but am confused about ...
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What are the advantages of NRF24L01 when compared to LORA module

i am designing an Iot project. In that project i want to transfer small bytes of information from one place to another place which is located more than 2kms away from previous location. therefore ...
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6 votes
2 answers
299 views

Encrypting sensor data on Raspberry Pi?

I am sending sensor data between two Raspberry Pis via lora. I am using two Lora Radios and NOT using a LoraWan network like The Things Network. How should I encrypt my data? Are there any open source ...
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7 votes
2 answers
539 views

How to increase the Lora range using a LoStik?

I know this is a common question but I am wondering how to increase range on my Lora 'LoStik' device. https://www.crowdsupply.com/ronoth/lostik I am trying to send data from one LoStik to another. ...
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2 votes
1 answer
281 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 ...
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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:...
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6 votes
1 answer
135 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 ...
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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?
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3 votes
1 answer
555 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 ...
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2 votes
3 answers
630 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 ...
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4 votes
1 answer
55 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 ...
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2 votes
1 answer
86 views

Can LoRa end points communicate directly?

Can LoRa end points communicate directly? Or is a gateway/network server always required?
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7 votes
4 answers
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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 ...
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3 votes
1 answer
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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 ...
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3 votes
1 answer
4k 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?
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4 votes
1 answer
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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 endian. ...
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5 votes
1 answer
2k 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 ...
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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: ...
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4 votes
1 answer
102 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 ...
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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 ...
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3 votes
2 answers
235 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 ...
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3 votes
2 answers
97 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 ...
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2 votes
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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-...
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4 votes
2 answers
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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 ...
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4 votes
1 answer
108 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 ...
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3 votes
1 answer
224 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,...
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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 ...
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3 votes
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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 ...
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8 votes
2 answers
284 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 ...
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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 ...
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8 votes
2 answers
101 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 ...
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