any recommendation for a filed tester to test and know where is the best spot I should install my Lora GW/Sensor? and what is the best RSSI/SNR I should target?
I read an article it's possible to calculate relative position to 2 or three gateways (or nodes?l using time distince of arrival and rssi. The hateways talk to each other and compute the relative postion through triangulation the (or lat / long if the gateway has gps). The end point doesn't need to send any data really....just an ID or number. Anyone do this?
Hello Sir. Thank you very much for uploading such an excellent tutorial. I have a question that how can we calculate received Power from RSSI. Do we need to add RSSI and SNR which will be equal to received power? or what is the method?
thank you for your videos i learned a lot from them, i just have a question. i cant really wrap my head around SNR first of all you said that lora works under the noise floor level.. so making SNR values below 0. but then you say that typical lora SNR values are -20 to +10. but +10 makes it above the noise floor level. then it is said that lora cant de-modulate signals above -7.5 db below the noise floor. can you please elaborate what im missing here ? thank you for your help
Hey, I got a little confused with this too, but re-watched the video and I think I get it now. +10 would be ideal, but I guess this isn't always possible, however LoRa is able to operate at negative SNR values, and is subsequently able to demodulate signals between -7.5 and -20 dB from the noise floor. My guess is that if the signal strength is too close to, or specifically too close to and below the noise floor, the signal will not be demoldulatable.
Signal-to-noise ratio (SNR) is defined as the ratio of the power of a signal (meaningful output = Pout) to the power of background noise (meaningless or unwanted input = Pin). SNR can be either positive and negative value if you represent it in dB scale. Negative SNR means that Signal power (Pout) is lower than the noise power (Pin). dB = 10 Log(Pout/Pin) Good: SNR > 0 Bad: SNR
Using a SDR, see: ruclips.net/video/bSAa2aOXpCc/видео.html Using Cubic SDR software: cubicsdr.com/ And applying a trick. I make sure the message is send with SF12.
Loved the end of the video! Looks awesome! Thank you!
Very informative and most of all well explained! Thanks
So what is the difference between the Rx sensitivity and RSSI? What of both concepts I need to focus in order yo choose a LoRa device?
Nice videos. Thanks. What is the tool you are using to show the radio frequency activity?
Is there a function to read the RSSI and SNR when I send between two lora modules? I would like to show it on a display.
How can you demo them? What application that you using can simulate them...?
Hi sir. What is the name of the software you are using to hear LoRa signals?
any recommendation for a filed tester to test and know where is the best spot I should install my Lora GW/Sensor? and what is the best RSSI/SNR I should target?
I read an article it's possible to calculate relative position to 2 or three gateways (or nodes?l using time distince of arrival and rssi. The hateways talk to each other and compute the relative postion through triangulation the (or lat / long if the gateway has gps). The end point doesn't need to send any data really....just an ID or number. Anyone do this?
Hi there..What is the SINR and CIR ?..What threshold does lora has to successfully differentiate between the signals ?
please help sir how to get the rssi value of lora ebyte e22
Hello Sir. Thank you very much for uploading such an excellent tutorial. I have a question that how can we calculate received Power from RSSI. Do we need to add RSSI and SNR which will be equal to received power? or what is the method?
The received power is the RSSI.
sir, i want to ask about how to converting RSSI 0-255 value to dbm?
Is -120 DBM the lowest rssi that lora will work at?
About -137 dBm in some configurations.
Nice !
thank you for your videos i learned a lot from them, i just have a question. i cant really wrap my head around SNR first of all you said that lora works under the noise floor level.. so making SNR values below 0. but then you say that typical lora SNR values are -20 to +10. but +10 makes it above the noise floor level. then it is said that lora cant de-modulate signals above -7.5 db below the noise floor. can you please elaborate what im missing here ? thank you for your help
Hey, I got a little confused with this too, but re-watched the video and I think I get it now. +10 would be ideal, but I guess this isn't always possible, however LoRa is able to operate at negative SNR values, and is subsequently able to demodulate signals between -7.5 and -20 dB from the noise floor. My guess is that if the signal strength is too close to, or specifically too close to and below the noise floor, the signal will not be demoldulatable.
good video
I am surprised how a useful signal can be received if it is below noise floor.
So going by that, my signal should be good
RSSI: -22
SNR: 11.5
so what is good SNR value? >0 or
Signal-to-noise ratio (SNR) is defined as the ratio of the power of a signal (meaningful output = Pout) to the power of background noise (meaningless or unwanted input = Pin).
SNR can be either positive and negative value if you represent it in dB scale.
Negative SNR means that Signal power (Pout) is lower than the noise power (Pin).
dB = 10 Log(Pout/Pin)
Good: SNR > 0
Bad: SNR
@@Mobilefish thanks for explanation
Can I hire you for a project
good presentation, expected more explanation from the presenter. but thanks anyways
How do you get the lora data signal?
Using a SDR, see: ruclips.net/video/bSAa2aOXpCc/видео.html
Using Cubic SDR software: cubicsdr.com/
And applying a trick. I make sure the message is send with SF12.