Hello, Does anyone know, or has sources of, what happens when 2 LoRa messages mix up? Usually i see people state that if there are 2 incoming messages at the same time that overlap, both messages are gone. (Messages on same frequency and same SF) But what happens when there is a weaker signal, at…

Strongest packet is demodulated if power difference >6dB.

Hi Weffel, I don’'t kmow any beter document That explain LoRa spread spectrum. I will try to oversimpliphy thinks. Later on you can re-read the simtech document spread spectrum wiki Resistance to jamming (interference Resistance to eavesdropping Resistance to fading Multiple access capability -…

Hi, This link is not working. Could you send me the document to ..@gmail.com

an1200.22.pdf 1054.29 KB (took me 2 seconds to find)

Another nice resource as mentioned in another topic: [image] What happens if someone does not follow the guidelines? [image] At about 19 min. 50 sec.

Hi So if two modules start to send different massage with same length at same time exactly,Which massage is received in receiver module?

From @arjanvanb post just above; ‘strongest packet is demodulated if power difference >6dB’

Thanks So if they have same strong…? Another question If two modules with same Sf,send two packet in small different time.what be happen(packet’s strong is same)?

[image] daryooosh: So if they have same strong…? The answer is here (0<6): [image] LoRaTracker: ‘strongest packet is demodulated if power difference >6dB’

Collision between LoRa packets with different signal strengths

Gateways

arjanvanb (Arjan) August 14, 2018, 3:55pm 10

Another nice resource as mentioned in another topic: