pi to pi data - Raspberry Pi Forums

hi,

have 2 pi's (or more) , want transfer data via wi-fi. nothing complicated word, number or temperature.

example, pi @ side of house , pi b @ of house. if pi senses movement via pir sends 'signal' pi b start recording 1 minute video.

possible solutions i've thought about!! shared file on network pi changes contents "record" , pi b keeps checking change in wording. not best solution there lot of disk access. or same idea network memory location on pi b ?

more easy ideas?

you set simple network listener on tcp or udp port , have wait specific input.

set client send or broadcast message.

it's easier sounds. simple in python. i've done similar thing in c (and don't know c) 1 pi monitoring doorbell button , broadcasts "dingdong" across lan. various other linux systems listening , play audio file when receive it, can hear doorbell room in house. later hook camera takes picture of caller @ same time , can decide whether in or not

alternative, bit heavier, have web server running on pi b , pi sends request web page when event happens. pi b run php code associated web page parameters given.

there mqqt don't know about, seems on complicated simple message passing system.

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