search

gioblu / PJON

PJON (Padded Jittering Operative Network) is an experimental, arduino-compatible, multi-master, multi-media network protocol.
Other
2.73k stars 239 forks source link

Raspberry Pi as master with RS485 #374

Open akadlec opened 3 years ago

akadlec commented 3 years ago

Hi to all, i have a small network composed of arduino as a slaves and one esp8266 as a master. Using TS over RS485. This setup is working great. But right now I would like to replace esp with rpi with rs485 header. My idea is to use rpi to send and receive messages and proxy them to some message queue to be handled by my PHP app.

Is it good or bad idea? Did someone similar setup?

akadlec commented 3 years ago

Or is better idea to have anoter arduino as a proxy, where will be "master" sketch for the pjon network and rpi connected via serial link to aurduino?

gioblu commented 3 years ago

Ciao @akadlec ThroughSerial over RS485 works fine on RPI as well, it should work fine with the setup you describe!

akadlec commented 3 years ago

Hi @gioblu thanks for your reply. I will try to start with an example code from this repo. And what do you think about the rs485 and TS? I saw in other issues your comments where you recommend other strategy.

gioblu commented 3 years ago

I suggest you to try SoftwareBitBang @akadlec, with a single wire up to 2000m long you can connect up to 255 devices and it supports multi-master. The only con is that you need a TS-SWBB switch between nodes and the RPI (SWBB does not run on any rtos because of timing issues).