Andreas, again a brilliant video which is both interesting and very informative. Your explanations of why things didn't work is very helpful along with the solutions you provide. I hope to see many more video in the future. Love your work.

@AndreasSpiess

6 жыл бұрын

Thank you for your nice words!

Brilliant! Thank you Andreas - you are an inspiration to all of us. Keep up the fun work...

@AndreasSpiess

6 жыл бұрын

You are welcome!

An excellent video, love your practical applications . One of the most interesting channels around.

@AndreasSpiess

4 жыл бұрын

Thank you for your nice words!

Thanks for all the wonderful videos! You are doing a great service! 🙋‍♂️👍

@AndreasSpiess

6 жыл бұрын

You are welcome!

Thankyou Mr Spiess. After two years I used your video as a QuickStart guide. Thankyou for your video. 👍🏻👍🏻

@AndreasSpiess

3 жыл бұрын

The same happens to me sometimes. I have to go back to one of my old videos...

Literally the last 3 things ( solar power for esp8266, this mailbox notifier and Tradfri lights) i want to do as a hobby project, you have investigated! Thank you for your structured and detailed approach

@AndreasSpiess

5 жыл бұрын

You are welcome. I hope it helps!

Thanks Andreas - a video up to your usual high standard with lots of interesting information!

@AndreasSpiess

6 жыл бұрын

Thank you!

As always, great tutorial, will be helpful in many applications. Thank you.

@AndreasSpiess

6 жыл бұрын

You are welcome!

Hello Andreas, another wonderful hardwork presented free of cost to your channel viewers. I love your work and admire how quick you are. I am in Canada, if were near your place, I would have seek to join you in your work. However, I learn a lot from your videos, interestingly whenever I see any of your new video, I was already thinking about the same idea, and here you post the video, solving the issue climbing into my mind. Surprisingly frequency matched. About the thumbs down, it is always good to know, that people who does not like you; your work made them to see your work/videos. Keep up the good work, we all love your work and we need you.

@AndreasSpiess

6 жыл бұрын

Thank you for your nice words. I care more about thumbs up and nice comments like yours ;-)

I very much enjoyed watching this project. It was quite sophisticated. I feel like I learned a lot. I love how low-powered you made this project and the range it had. Mailbox notification was something I had thought would be an interesting Arduino project a while back. Now that I see what all can be involved with it...I may save this as a project to attempt until I'm a little more experienced (about to get my first Arduino Pro Mini to experiment with). Perhaps the best part of this video for me was your explanation of what is essentially a checksum for data integrity. I learned this concept in one of the grad school classes I took. But your explanation is so much easier to understand. Thank you!

@AndreasSpiess

2 жыл бұрын

You are welcome. I am sure you will succeed!

Great... I didn't know that it is possible to use LoRa nodes in one to one communication. I am working on LoRa in my PhD here in Italy and it will help me a lot in my research. Thank you very much for upload this video

@AndreasSpiess

6 жыл бұрын

Good luck for your thesis. What is it´s topic?

Great video Andreas. Really useful!

@AndreasSpiess

6 жыл бұрын

Thank you!

Another informative and highly detailed video. Excellent!

@AndreasSpiess

6 жыл бұрын

Thanks!

Another great video, and thank you for taking the time to make it. I made myself a mailbox notifier out of an ESP8266 (because the mailbox is close by, I can use WiFi), a normally-closed switch, and a couple of bipolar transistors. One transistor functions to cut off the power entirely when the mailbox switch is open, which lengthens the battery life considerably (so far it's lasted over 18 months)*. When the box is opened, the switch closes, the transistor conducts, and the 8266 boots and sends the notification. The second transistor lets the 8266 keep the power on while it works to establish a connection and send the notification, which can take longer than the box door is open. When it's done, the 8266 switches off that transistor and the power drain goes back to zero. (Okay, not exactly zero since there's some leakage current, but close enough.) * I took this approach because I'm using a NodeMCU, which because of its USB and LED draws a lot of current even when the 8266 is in deep sleep. I didn't feel like cutting it up to disable those pieces.

@AndreasSpiess

6 жыл бұрын

Thanks for your feedback. I used this approach with one of my Amazon buttons. Just with one P-channel FET. It could also be used here to save even more energy.

Very useful project. Seeing the postman's photo (great guy) made me think this video was about some kind of HUD project.

@AndreasSpiess

6 жыл бұрын

He really is a great guy and very helpful!

Andreas, I loove your sense of humor and your Sweedish (purposing mistake) accent;) I admire your experience and appreciate your willing to share all the knowledge in a practical way:)

@AndreasSpiess

2 жыл бұрын

Thank you for your nice words!

Hello Andreas. thank you for the very good and useful video. please keep up the good work.

@AndreasSpiess

6 жыл бұрын

You are welcome!

Thanks bro for all your help, you have helped me with many projects, i currently have the Lora hat for the Rasp Pi , the Dragino lora shield for arduinos( i have MEGA and DUE) and 3 heltec ESP32 Lora boards , i want them all to talk , for back-up and redundancy on a long range UAV. Im still a beginner but i studied AEROSPACE ENG at Penn State and dropped out my senior year with no degree and a hard case of alcoholism. Took me 20 years to beat the Alcohol now im back at the engineer(not in school) just for fun, in a small way you are contributing to keeping me sober. So Thank you for your videos and their part in my sobriety

@AndreasSpiess

2 жыл бұрын

I am glad to read that you like my videos and that you base projects on them. That is always what I hope when I produce them.

Sunday Morning with Lora😀😀😀 cool Mr Spiess.

@AndreasSpiess

6 жыл бұрын

Good morning Dean!

Great tutorials, thanks from Switzerland and Kind Regards Jürg Lienhard

@AndreasSpiess

6 жыл бұрын

You are welcome!

Happy postman finally he will get a hot coffee on cold days ⛄ Could be useful to see if the laudery machine is still shaking or already finished 👍

@AndreasSpiess

6 жыл бұрын

These days they do not have time for that. But he will get a gift at the end of the year that he can buy a coffee or two himself

very nice explanation, Thanks

@AndreasSpiess

3 жыл бұрын

Glad you liked it

Great video! Congrats and thanks!

@AndreasSpiess

6 жыл бұрын

You are welcome!

Thanks for sharing 😀👍, interesting stuff 😀

@AndreasSpiess

6 жыл бұрын

As usual. You are welcome! Thank you for your regular comments!

Glad you had fun shooting the video :D i had fun watching it too!

@AndreasSpiess

6 жыл бұрын

:-)

Thank you. This an amazing learning video.

@AndreasSpiess

6 жыл бұрын

You are welcome!

Andreas. I'm very happy to see your video. Very Very interesting and well done. It gives the opportunity to everyone to understand. Grazie. I also love your test campaign.. Regards from Italy. Juest yesterday I tested 2 Lora nodes with hand made PCB to carry them Ai-thinker Ra-02 SX1278. Regards !!

@AndreasSpiess

6 жыл бұрын

As you are on 433 with your boards you have to use point-to-point...

@PierAisa

6 жыл бұрын

Andreas Spiess perfect. Thank you. I'm OM calling IZ4OXX. Regards

@PierAisa

6 жыл бұрын

I build a raw interfaee for Rpi and Arduino at SPI level. But I'm preparing also a level translator circuit to connect LoRa sensors (3.3V) to Arduino UNO for example. kzread.info/dash/bejne/qGlsrcuxhcqvo7Q.html

The Radiohead library is amazing, used it with many other rf modules. It has a mesh mode too that's great

@AndreasSpiess

6 жыл бұрын

Did you experiment with the mesh? I would be interested if it works and how much power it needs.

@therishabhdhiman

3 жыл бұрын

Radio head is amazing i was trying to use NRF24 module with RF24 library but didn't worked and using RadioHead it worked like charm.

Thanks for a brilliant Video

@AndreasSpiess

6 жыл бұрын

You are welcome!

Simply Amazing!

@AndreasSpiess

6 жыл бұрын

Thanks!

Sir thanks a lot for your project explanation

@AndreasSpiess

5 жыл бұрын

You are welcome!

And now comes the big question after more than two years: Does it still work in your mailbox? :)

Most excellent video. The concept of precompiler directives is used in quite a few programming languages, I didn't know it was possible in the Arduino IDE. Thank you. I have a similar system that just uses a cell phone. My packages from China arrive at my UPS Store (like a post office but better), they scan the packages and send my phone a text message with the shipping number. Then I know to drive to the UPS store and something will be there for me. ;-) Keep broadcasting!

@AndreasSpiess

6 жыл бұрын

We got some SMS notice but because so many packets arrive from China they switched it off...

Great video

@AndreasSpiess

6 жыл бұрын

:-)

I'd just screw a raisable arm to the mailbox, but this technical solution is amazing. Thanks for sharing.

@AndreasSpiess

5 жыл бұрын

There are 6 mailboxes in one box. And I do not see it from our house ;-)

i love the way you say" baaaye" at the end lol

@AndreasSpiess

6 жыл бұрын

Thanks!

Perfect timing (for me) again Andreas, thanks! I have some Heltec ESP32 LoRa boards with integrated LoRa chip and some LoRa32u4 boards with integrated RFM95 modules. The lora library looks very capable and simple from the examples too. This low power long range type project may be the architecture for applications like bee keeping or wide area security or access control like 2-step authentication. Thanks again!

@AndreasSpiess

6 жыл бұрын

Did you test the heltec modules? Are they 868 or 915 MHz?

@garrypkeogh

6 жыл бұрын

Andreas Spiess Hi Andreas. Yes, from China they ship with a basic LoRa sketch I didn't explore. I installed a LMiC LoRaWAN sketch using OTAA which works perfectly with my gateway (868MHz RAK831+Pi2+resin.io+permanent mast mounted antenna on my house. Gateway is outdoor, at the base of the 5m mast with PoE and backhaul via TTN. Super easy/robust) I want to try plain simple LoRa on the Atmel boards, timing of this vlog is 100%, thanks again!

@AndreasSpiess

6 жыл бұрын

Thanks for the update. I ordered now a few of these boards and will do a test with my spectrum analyzer to see how they perform. Stuff for another video ;-)

Super useful thank you

@AndreasSpiess

6 жыл бұрын

:-)

@mostlymessingabout

6 жыл бұрын

Andreas Spiess i get better loss with the RFM69 with GFSK than this LoRa module...

I find weather stations transmitters sync transmit times so the transmit and receiver 300MHz turn on, turn off, at the same time and meet back at a later time for battery consumption, pretty simple.

@AndreasSpiess

6 жыл бұрын

This is a good idea if both nodes are on batteries. In my case, one node can be connected to mains.

well done

@AndreasSpiess

3 жыл бұрын

Thank you!

Nice video. I have some problem with battery life and i solved unplug the led of arduino.

@AndreasSpiess

6 жыл бұрын

Thanks!

Hello, nice video ! I'd like to ask what kind of sensor have you used for mail presence detection in a mailbox. Thanks.

Awesome

@AndreasSpiess

2 жыл бұрын

Thank you!

Hi Andreas, your tutorials are superb. Thanks for doing a lot of the "heavy lifting". Just one question, can this be extended for multiple end nodes connecting to one "master" node ?

@AndreasSpiess

4 жыл бұрын

That would then be a network like LoRaWAN

Hi AndreasIf you want to lower the power consumption of your arduino, you can remove the voltage regulator and disable brown out (a fuse setting).Thx for your youtube channel. Very inspiring.Markus

@AndreasSpiess

6 жыл бұрын

Thank you for your tip!

Hi Andreas very good idea! I will try to do the same if I can.

@AndreasSpiess

6 жыл бұрын

I am sure you can, if you want ;-)

@yomboprime

6 жыл бұрын

Yes! “Do. Or do not. There is no try.” xD

haha, like your videos. The accent cheers me up and makes the video even more fun. I'll bet you'd be a blast to have a drink with and discuss electronics. Keep making the great videos and stay healthy. BTW, how's the weather there in the world's ice cube?

@AndreasSpiess

3 жыл бұрын

It was quite warm these days. Around 15 degrees C during the day. I do not live in the mountains where it is much cooler.

Great video. How about just power on the node through a relay when the mailbox door opened. Zero power consumption when the door is closed

@AndreasSpiess

6 жыл бұрын

You are right. I used this method for a Amazon button (with a FET)

Great video, Andreas. I really like how you're taking various previous things to build a solution to a new problem. You do a great job of explaining everything in detail (or referencing previous videos). I think the 10 thumbs-down are from people who are jealous of what you're doing... ;-) You know, if you really want to do a really, REALLY long range test, you could send me a LoRa system, and we can test to see if it'll reach your house (I'll conveniently forget to mention that I live in the US... 8-) On a different note, it seems that LoRa doesn't have great coverage in the US -- yet. A few months ago, after watching one of your LoRa videos, I checked a coverage map, and there wasn't much coverage in the Chicago (Illinois, USA) area, which I found surprising. I just checked again, and now there's some coverage, but alas, none in my area (I'm just outside the green area). Oh well, we'll get there... Here's the coverage map I used (maybe there's a better one; I don't know) : www.senetco.com/coverage/ Keep up the good work!

@AndreasSpiess

6 жыл бұрын

Thank you for your compliment! On shortwave, it would be no problem to reach the US ;-) Concerning coverage: Here you find the public LoRaWAN coverage: www.thethingsnetwork.org/map

@wombat9999

6 жыл бұрын

I believe in giving credit where credit is due. :-) Yeah, I didn't think of shortwave! LOL! Maybe do slow scan transmissions as well... 8-) Thanks for the pointer to the LorRaWAN map. I hate to say it, but this is even more depressing -- only two (yes, count 'em -- two!) nodes in the Chicago-land area. Very surprising there aren't more. Maybe there are but they aren't registered with the site...?

@AndreasSpiess

6 жыл бұрын

+Wombat999 If they are connected to LoRaWAN they are automatically shown on the map.

Hello Andreas, great video as always! I'm little bit concerned about temperature and baterry life? Will it really works during freezing winter times?

@AndreasSpiess

6 жыл бұрын

Well possible. I have to check. But I can always go for 2 AA cells.

Impressed

@AndreasSpiess

6 жыл бұрын

Thanks!

Hi Andreas. GREAT Video structure. Finally your Channel is my most favorite Channel on KZread :) one more Suggestion to improve your work : in This Video you Pop up informative links to diffent topics. Most of us dont want to Interrupt the actual Video by clicking the link and later on its Hard to find the Video Position again. Solution: please add all the mentioned links in the Video description :)

@AndreasSpiess

6 жыл бұрын

Thank you for your feedback! I checked it on iPhone and in Chrome browser. In both cases, the cards stayed until the end of the video at the right end of my screen and I was able to click it then. There was no necessity to interrupt the video. Is it different in your case?

@grindel80

6 жыл бұрын

Andreas Spiess in my case the Information stayed for around 3 secound. Than its vanished...

@AndreasSpiess

6 жыл бұрын

Strange. Which device did you use?

@grindel80

6 жыл бұрын

i used the newest firefox browser on win10 64bit system... maybe it has something to do with my adblockers.... i will find a way on my own. thx

I am most grateful for your LoRa videos, I have been looking for a cheap means to support remote telemetry data. I've got a little land here in Texas and I've want to monitor the back property for environment and critter concerns (we have coyotes roaming the area). I'm still in the experimental phase, right now I'm looking at the power budget and deciding what kinds of data I'd like to collect, how best to collect it, and how best to power the remotes. I also want to have the remote unit act as an autonomous coyote deterrent system. I've found coyotes are easily frightened by green lasers, so controlling one or more lasers to sweep the area would probably work. I've implemented your point-to-point LoRa nodes, and they are performing beautifully. I have those and two other simple WeMos nodes sending BME280 data to MQTT running on my Mac. Instead of the cloud, I have installed the TICK stack (Telegraf-Influxdb- Chronograf-Kapacitor) and Grafana for collection, storage and visualization of the time-series data. I'm moving these over to a Raspberry Pi as a long term solution. So far, so good. Keep up the great work you do for the community. Kind regards, -Kirk Franks

@AndreasSpiess

6 жыл бұрын

Thanks for your feedback. I also have plans to explore InfuxDB and Grafana, but might not use Telegraf, because I am on Node-Red. Fortunately, we do not have the problems with wild animals here. Our place is much more crowded than yours...

Hi Andreas, to get to SF11 and SF12 with the RFM95 there is a poorly documented register called LowDataRate (bit-4, register 0x26) that allows receiving the slower/longer symbol transmissions. It's not obvious in the usual RFM95 datasheets, but googling should track down some examples (using the RadioHead library). The price for that extra range is the doubling of transmit air time with each step up in SF (and the extra power that takes).

@AndreasSpiess

6 жыл бұрын

Thanks for the tip!

Thanks you mate :) with swiss style :P

@AndreasSpiess

6 жыл бұрын

You are welcome. Where are you from?

@halukyilmaz9621

6 жыл бұрын

i am from Turkiye, my objective is smart city and energy , hope will handle it, been working along with mqtt and esp12e but long area , it requires hotspot so i started to learn LoRa

@AndreasSpiess

6 жыл бұрын

Good luck!

Great video, I was very interested in your drone LoRa test, was this 433MHZ LoRa or another Frequency like 868MHZ ?

@AndreasSpiess

2 жыл бұрын

I do not know which test you refer. I use LoRa on 433 and on 868 but most videos are bade with 868MHz

Hi Andreas, thanks for the content. Can you approximate the distance from the mailbox to your kitchen? I'm curious how well these penetrate mailboxs.

@AndreasSpiess

4 жыл бұрын

The distance is not the problem. All losses are in the obstacles.

Another great video Andreas! I'm fine with programming but sketchy with electronics. What Lora enabled devices would you recommend that are easy to use and low power for point-to-point? I mostly use ESP32 or 8266 boards and Teensy, Arduino Nano. I need the sender to be battery operated with temperature, humidity and light sensors, and the receiver to post the data using WiFi to an https based web service. I understand what to do at the WiFi end to post data to the server, but I'm new to Lora and don't know what components to buy that don't required soldering, breakout board construction, etc.

@AndreasSpiess

4 жыл бұрын

Maybe you watch my other LoRa videos? Your question has no short answer.

It's an ice cube here too BTW

@AndreasSpiess

3 жыл бұрын

For the moment it is ok during day and still cold in the nights.

Hi Andreas. Nice video, again! in the beginning i was thinking you will send by mail a package with a lora node inside and track the way it makes until the destination using the drone as a high altitude receiver... amateur radio brains always flying to much :) 73.

@AndreasSpiess

6 жыл бұрын

Lol

Hi Andreas! Another great video. I am the guy with the French accent :) Just one question (in this mode node to node communication), how do you know to which LoRa node you are sending data to ? With Xbee for instance you specify an address but if you've got multiple LoRa receiver nodes how doest it work ? Thank Fred

@AndreasSpiess

6 жыл бұрын

In my case, I did not use addressing. RadioHead library has such use cases. And also RadioShuttle supports this (see link)

Damn... I just finished my mail box notification project last night. Talking about ESP (extra sensory perception)!! It consists of an ESP2866-01 powered by a LP2985-3.3 regulator that has an enable pin, Oddly enough, this regulator has a marking of "LORA" printed on top of the IC!! The ESP8266 once powered-up, sends an email and goes back to deep sleep until the Attiny powers down the regulator. This is how it works: A magnetic switch (I have a few left over from my alarm installation), is connected to one of the pins of the ATTiny85 through a 470K resistor to a +4.8V (4x12V NiMH) supply and ground, which is also being charged by a solar panel through a schottky diode and prevented from over charge by a 1 Watt 5.1V Zener. The Attiny is directly powered by the battery and is in sleep mode all the time. When the mailbox door opens, the reed switch opens and takes the interrupt pin high through the 470K resistor to the battery, which awakens the ATTiny85. Which in turn enables the regulator through the enable pin of the regulator, which in turn powers-up the ESP8266-01 module. The ESP8266, upon power-up, will log on to my router and sends me an email saying "You've got mail" :) Then, it goes to sleep. This process takes < 10 seconds. After 20 seconds, the ATTiny will disable the regulator and the ESP8266 will be turned off. Even if the mailbox door is left open (due to big packages). it will go to sleep until the mailbox door is opened again. Consumes only

@AndreasSpiess

6 жыл бұрын

Thank you for your feedback. And I learned something: I forgot about the "door stays open scenario). With my interrupt this will be ok, but not with the concept proposed by others where the power is managed by the reed switch...

@ufohunter3688

6 жыл бұрын

Yeah, If it wasn't for that pesky door being left open, I had it in the bag with one transistor, diode, capacitor, and 2 resistors. It would catch and hold even the fastest door opening and closing. power the ESP for a minute and then go out. (R/C-discharge the base of the transistor). There are more than one way to skin a cat, as cat lovers would NOT say. :)

@AndreasSpiess

6 жыл бұрын

:-))

Loved the "mailbox from China has arrived", ahahhaha

@AndreasSpiess

6 жыл бұрын

:-)

@patrichausammann

5 жыл бұрын

Just "mail", I think Mr. Spiess does not need that much mailboxes. 😉

Saw this within 9 minutes of you uploading score. Now what was that video on the button again. Next one for the front door. May go through my node-red.

@AndreasSpiess

6 жыл бұрын

I like simple things like buttons ;-)

If I build my own gateway, can I connect to other LoRawan gateways to communicate with them? (Still confused about that). If possible, Id love to see a new updated video for 2022. thanks

@AndreasSpiess

Жыл бұрын

Maybe you watch my LoRa introduction video. Gateways are connected to the TTN network (computer network), and not to other gateways.

Cool

@AndreasSpiess

6 жыл бұрын

:-)

Thanks for your contribution to the community, I have a question is that in this video, the node called "Receiver" is not be called "gateway" just because it did not send data to the server right? I am quite confused

@AndreasSpiess

10 ай бұрын

You could call it gateway if you want. Gateway is used for TTN and has a specific meaning. This is why I used the word receiver.

@hannguyen2656

10 ай бұрын

@@AndreasSpiess Thanks for your reply sir. I just don't understand why we need to register a gateway in TTN, to save data Can I use another one like Thingspeak or Nodered?

@AndreasSpiess

10 ай бұрын

@@hannguyen2656 TTN needs to know where to transfer your messages ;-)

Hello Andreas ! I've started experimenting with LoRa point-to-point. So, I've built a sender and a receiver-mqtt forwarder using ESP32's and SX1276 modules. The receiver listens to LoRa packets which must contain two subsequent c_strings (zero terminated char[]) . The first string is the MQTT subtopic , the second is the string value to be published. In this way the receiver-forwarder can handle data from any sensor I may want to build and Home Assistant MQTT platform will receive the correct values. In addition the receiver publishes the RSSI as a sub-sub topic. eg: lora/sensor1/counter = "130" incremented in every loop by the sender. lora/sensor1/counter/rssi = "-90" added MQTT message by the receiver. The modules are equipped with small wire spiral antennas. Not the best. The range I get at SF7 and BW 124E3 is about 450 meters in built-up area (city) . Not bad, and more than sufficient for sensors out of WiFi range. It stops rather abruptly at and RSSI of about -120. I tried to use a different SF and BandWidth for the sender and the receiver, and this does not work. It seems both must be set to the same values. I guess this is a limitation of building your own P2P connection instead of using LoRaWAN ? I understand the WAN implementation of LoRa, with Gateway based on SX1302 can do "adaptive data rates", i.e. modify the SF and BW parameters based on the network conditions. Did I understand this correctly or is there a way to adjust SF and/or BW built in the modules ? And BTW : thanks for the inspiring video's !

@AndreasSpiess

Жыл бұрын

Both ends have to have exactly the same modulation selected, you are right. But you should be able to select the transmitting as well as the receiving parameters. The Gateway chip is an exception because it can adapt to the SF to match the transmitter.

@AlexSlaets

Жыл бұрын

@@AndreasSpiess Thank you. By 'you should be able to select' do you mean the calls to LoRa.setSpreadingFactor and similar as the way to select them ?

@AndreasSpiess

Жыл бұрын

@@AlexSlaets All parameters have to be the same, not only the SF. I do not know how you program your module.

@AlexSlaets

Жыл бұрын

@@AndreasSpiess with arduino ide. I use a block of #defines with all Lora parameters which I use in sender AND receiver .ino . Guess I could put these #defines in a local.h file .

Very nice tutorial. It is rasonable to have a single receiver and multiples sender sending messages at different times? I don't want to build a LoRaWan gateway, but keeping it offline

@AndreasSpiess

Жыл бұрын

Of course you can use multiple transmitters and one receiver as long as they do not transmit at the same time.

Hi, i am trying to make the node on a breadboard, but i can t figure out which pins in the lora module (sk1278/rf95) are: CS, IRQ , i am using the lora module with a breadboard adapter, so far i found this tutorial and library the most simple, as i can see from your videos. Thanks

@AndreasSpiess

5 жыл бұрын

Maybe you have a look here: github.com/hallard/WeMos-Lora

Any idea at the moment why SF12 did not work? Did anybody succeeded in point to point lora communication with RFM95 on SF12? I tested lora point to point with reyax modules and had a better result (less missed messages at 2km) on SF10 than SF12, still confused about this.

@AndreasSpiess

3 жыл бұрын

I never tried it again. SF12 works fine on TTN with the RFM95

does frequency has any effect on range. from your videos I learned that for each country, there is a specific frequency , Canada frequency is 915 Mhz however the module is more expensive than lower frequency module, so I am wondering if I can use lower frequency module in Canada, would that affect range. I will use it on drones mainly, so range is important

@AndreasSpiess

5 жыл бұрын

If you are interested in such questions I made two videos about wireless communications.

nice. we all know how it feels to wait for the mails from china. i also need something like this, but the door remains closed, so need some other kind of sensing workaround.

@AndreasSpiess

6 жыл бұрын

I am sure you will find a way ;-)

13:40 The mailboxes of your neighbors have spam-filters installed, but not yours. All that spam will trigger false alarms of your mailbox notifier.

@AndreasSpiess

6 жыл бұрын

You are right. But I am married and therefore only have 49% of the voting power for these things...

@zvpunry1971

6 жыл бұрын

Then you must think of a way to differentiate between spam and china-packages, maybe by the time of day it is delivered. The spammers use child-labor to deliver their spam, so their workers are in school between 08:00 and 13:00, when a delivery occurs at this time, it is less likely spam. Maybe you should make notes what type of delivery occurs at what time. So you can get all your china-packages and you can tell your wife that there is something she is waiting for in the mailbox. ;)

@thesimbon

6 жыл бұрын

You could add a load Cell on the mailbox floor so you will be able to know the weight of the package :-)

@Retro_Care

6 жыл бұрын

you should have 2% more voting right :), just ad a camera in the mailbox (low quality one) and switch a screen on inside if mailbox is triggered. or/and maybe a sensor to detect hight or something, not sure if spam mail always lays flat in the mailbox, many experiments to do wit this kind of project.

@zvpunry1971

6 жыл бұрын

over-correcting an error isn't a good thing to do, it causes more problems then it solves ;)

@andreas i have a doubt about the shematic, can you share a diagram? how to connect rfm95 to arduino mini and esp?

@AndreasSpiess

6 жыл бұрын

I do not have more than I showed in the video. Make sure you do the pin definitions right in the software.

So why not run the power through the reed relay for 0uA off power consumption? Just add a output to a fet to hold it on until tx rx done and pass the 120mA if too much for the relay.

@AndreasSpiess

6 жыл бұрын

I did this with one of my Amazon Dash buttons. It is possible and very efficient. The problem is when the door stays open (for big things)

@miguelburgoslopez

6 жыл бұрын

And Idea could be to add second fet as trigger for the sensor fet, in case the sensor fet stays open for x time... them, controler put low the trigger fest to power off everything, is a quick solution don't know if will work, will be necessary to add a button to reset the trigger fet state.

Thanks for the great video My dad has a wireless doorbell that works by harvesting the power of a person pushing the button using a piezo element, there's no battery on the transmitter side. if you could get the power of the letterbox module low enough do you think harvesting the postman's effort in opening the slot would be possible?

@AndreasSpiess

6 жыл бұрын

Interesting concept. Never heard that this works. I think, the energy produced is quite small and the device has to be very low power. For the technology I use and the letterbox I do not think it would work.

@joinedupjon

6 жыл бұрын

Thanks for replying - he bought it on amazon where it was listed as a wireless and battery free but there are now similar units on banggood. I'm quite surprised it works, but it does. I've no idea what the power is but it must be quite tiny.

@johnywhy4679

2 жыл бұрын

@@joinedupjon Passive RFID harvests power from the radio waves. Opening the mailbox would prolly generate a lot energy.

How is this working for you long term? Have you changed / upgraded anything and if you did it again what would you use again. I am very interested in a similar project myself.

@AndreasSpiess

3 ай бұрын

I use now LoRaWAN (TTN). But this is of personal preferences...

@Edsdrafts

3 ай бұрын

@@AndreasSpiess I only started looking into LORA solutions today trying to make a small project where as I approach home in my car with presumably one LORA module another one at home picks up a broadcast of sorts and powers on driveway lights for 30sec. I am down the LORA rabbit hole am I getting nowhere near a solution hence me asking. LORAWAN seems amazing but way over my head. Ideally I was hoping for Arduino (I have couple of R4 WiFi that just came in) with plug and play LORA module of sorts for the job. Point to point only as range I need is 50m or less main focus is power saving. In future I can also add a 6 axis IMU for if the vehicle is moved the lights come on etc. Bit of security on top of convenience. I will keep an eye on your channel for something along these lines for a solution. Mind you I know very little to begin with so it might take me a while... Keep up the good work.

Hello Andreas, if could take a look at mysensors.org you will find a library that handles pretty much all you need (communication and sleep of arduino) and there are also instructions on how to lower sleep power: removing the led is ok, but you also need to remove the pro mini voltage regulator; with that removed I get less than 5 uA from my battery powered nodes (that are also using the same soshine batteries)

@AndreasSpiess

6 жыл бұрын

1. I have to look into this "mysensors". Looks promising... 2. Thanks for the tip concerning the regulator.

@thesimbon

6 жыл бұрын

I hope to see you soon posting on the forum over there :)

@nutcracker1684

6 жыл бұрын

MySensors definitely the way to go!

Hi, thanks for your efforts! In your video tutorial, it‘s point-to-point communication. Do you have any recommendations for point-to-multi-point communication via LoRa? I.e, how to make sure delivery from each node. As far as I know, LoRa only allows for receiving messages from one node at once. So that would be a problem.

@AndreasSpiess

3 жыл бұрын

This is a complex topic. Maybe you watch also my videos about LoRaWAN?

@johnywhy4679

2 жыл бұрын

Send to FFFF. kzread.info/dash/bejne/fKp2pZmcdcqvYKg.html

hello Andreas, Thanks for great tutorial, but i am getting some problem. After uploading the scetch, I turn up the serial monitor but it got stuck at Init Failed. I checked the connection twice. I used the same module with same frequency. Please help.

@AndreasSpiess

6 жыл бұрын

Remote diagnostics are not possible. Maybe you check everything, also cabeling, again.

request more video on mqtt -> node-red/cloud service part. :)

@AndreasSpiess

6 жыл бұрын

We will see what future brings...

Hallo Andreas, danke für dieses Video. Wo hast du dieses Multimeter gekauft um den Verbrauch zu messen?

@AndreasSpiess

6 жыл бұрын

Meinst du das uCurrent gold? Das kriegst du hier: www.eevblog.com/product/ucurrentgold/ . Ich hatte es in UK gekauft, aber den Shop gibt es nicht mehr.

Thanks Andreas. If I understand correctly, contrary to your earlier LoRaWAN videos, is there no encryption on the signal that you are sending? I am sure encryption could be added to a point to point system if it is necessary but just to aid my understanding - anyone could listen-in to hear your altitude and mailbox status if they had a LoRa setup? Also, if someone were transmitting data on the same channel, how do you filter-out unwanted transmissions on your receiver? You can easily imagine the situation where two or more people are transmitting data, e.g. drone altitude or soil moisture, on the same channel and without some filtering or encryption, there's no way of knowing if your drone is at 50m or your soil has 50% moisture content!

@AndreasSpiess

5 жыл бұрын

All wireless system share the same problem: They do not work if the frequency is occupied. The messages of these two methods are not encrypted.

@wyealex

5 жыл бұрын

@@AndreasSpiess All understood. Thanks again!

Hi Andreas, greetings from Chile.... I've been following your work and is really good. however, I have a small question. seeing the example codes you have shown, the connection between the nodes is secure? for example, any receiver with the right frequency can receive the data sent from the sender? thanks in advance and amazing job! =)

@AndreasSpiess

3 жыл бұрын

Everybody can receive it as with all wireless communication. You have to watch my video about encryption if you do not want that the content is readable

@igfuenzalida

3 жыл бұрын

@@AndreasSpiess Thanks for the quick response! I will look up your video about encryption and test it out! best regards and thanks!

Great video ! Mail from China has arrived... I guess your mailbox also gets mail from Switserland and elsewhere. So, the message is a little confusing ;-)

@AndreasSpiess

6 жыл бұрын

Mail from Switzerland is never interesting for me. Mostly bills...

I had one doubt, sir. What if someone buys an RFM95 module and programs it to send a crap message continuously all the time on a channel at say SF7. As this module will not follow any MAC protocols will it block all other LoRa communication of other modules using that channel? Am I going wrong in my concept? If yes please correct me and if no it seems to be a big problem!

@AndreasSpiess

4 жыл бұрын

Every wireless transmission can be disturbed. You do not need a particular signal for that.

@yashpandit832

4 жыл бұрын

@@AndreasSpiess thanks a lot. You are always the one who replies to my doubts. Thank you!

this a very good short course my question how we can build a big network of your idea with loRa components

@AndreasSpiess

6 жыл бұрын

Maybe you watch the videos about LoRaWAN

What is the ic2 memory used for on the pro mini LoRa pcb ? Can I miss it off ?

@AndreasSpiess

5 жыл бұрын

I do not think a pro mini has a flash chip

GPS says my 2 nodes would be about 6.7km apart with (it seems) only trees in the way at the remote end. Based on your testing, would this be possible with the smaller "rubber duck" or maybe dipole antennas from your world-record distance video? I need to monitor a small weather station that has 1 or 2 additional sensors on interrupts. Keep up the great work on the videos. I've learned a lot watching them. :)

@AndreasSpiess

6 жыл бұрын

Just try it. Predictions are not easy. With a line of sight, it will for sure be possible.

I know this is old, but do you have a shopping list for the items again or ones that will work? Thanks again for the Great Videos!

@AndreasSpiess

Жыл бұрын

All ESP32 LoRa boards from TTGO or Heltec should work. You can select the board with the features you need for your project. Pay attention that you chose the right frequency.

@cewaffles

Жыл бұрын

@@AndreasSpiess Thanks!

Nice tutorial, can i built both nodes using 2 Arduino pro mini instead of ESP8266 because i do not intend connecting it to nodeRED?

@AndreasSpiess

4 жыл бұрын

This should be possible.

Hi Andreas you mean at SF=12 you have bad RSSI ? or you donot receive any signal ?

@AndreasSpiess

Жыл бұрын

SF12 works with a lower RSSI than for example SF7. But it is much slower.

Can this be done with 2 x raspberry pi's and 2 dragino LoRa GPS hats?

@AndreasSpiess

6 жыл бұрын

I do not know of a point-to-point library for the RPi. Usually, using an RPi for this purpose is considered to be an overkill. In the worst case, you have to write your own "library".

Very inspiring video. Could you please mention for how many days this battery will work? Or do you know any battery which will work for at least 6months?

@AndreasSpiess

5 жыл бұрын

I did not test so I do not know. But you can do some calculations to find out.

HI. thanks for your awesome series of videos. they are very useful if it's possible to send you architecture of system where you can show us what materiel to use in order to create a complete system using sensors, LORA, MQTT? thanks for your help and your understanding

@AndreasSpiess

6 жыл бұрын

I think this video showed a sensor (reed switch), LoRa transmission and MQTT transmission in one system.

@abdelilahbouslama2098

6 жыл бұрын

First of all thanks for your feedback and your help.secondly i'm still beginner and i want know the best materiel(sensors, gatways) i can use in order to create large LORA network(without internet) using MQTT as communication protocol. Thanks for your understanding and your help

e como eu tramito dados via serial de um pro outro usando o usb dos 2 Arduino ? so vejo exemplo de sensor

@AndreasSpiess

4 жыл бұрын

I do not know. This video was about wireless communication, not serial connections

Hello Andreas, and thanx again! My mailbox is 900m away through a pine forest here in snowy Sweden. And the mailman takes a detour away from me if there is only little mail on tuesdays and thursdays... Do you think there is a chance it would work for me? Greetings from the wide forests by the great lakes, Peter

@AndreasSpiess

6 жыл бұрын

Your use case seems to be very rewarding, especially in winter. I just would try it. The investment is not big, the reward big, and the chance to succeed not really bad if you have a line of sight. Only trees should be ok, but I do not know how many meters of trees are acceptable.

14:30 wie geil 😂

@AndreasSpiess

3 жыл бұрын

:-)

Can you please share any video that shows communication between 2 rfm95 LoRa nodes using RADIOHEAD LIBRARY?

@AndreasSpiess

5 жыл бұрын

This is not very interesting for my viewers. Just do it. It should not be very complicated.