Raspberry Pi: Serial data to RNBO (OSC)

OoA

Hello RNBO people!

I am trying to send the serial data of an RPi4 to the RNBO patch through OSC, following this tutorial (I am reading a few sensors with Arduino and then sending them to the serial port).

Here is my script:

import liblo as OSC
import sys
import serial

# send all messages to port 1234 on the local machine
try:
    target = OSC.Address(1234)
except OSC.AddressError as err:
    print(err)    
    sys.exit()

# start the transport via OSC
OSC.send (target, "/rnbo/jack/transport/rolling", 1)

# read the serial port and flush it
ser = serial.Serial('dev/ttyACM0', 9600)
ser.flushInput()

while True:
    raw = ser.readline()
    data = raw.decode('utf-8')
    print(data)
    OSC.send (target, "/rnbo/inst/0/params/name", data)

What is wrong/missing?

If I use the Commandline method it works:

oscsend osc.udp://c74rpi.local:1234 /rnbo/inst/0/params/name value

But I can't figure out how to send the serial data.

Thanks for any help/tips,

Gabriele

Alex Norman

Does the 'transport/rolling' 1 message work?

I wonder what the type of your 'data' variable is? maybe you need to convert it to a floating point number?

OoA

Yes, transport/rolling works (I checked with rnbo.remote) so - thanks for the heads up - the issue is definitely in the type of data I am trying to send (which is for sure not integers/float).

What I am getting from Arduino is:

b'value1, value2, etc\r\n' >(I put the comma from the IDE thinking might be useful to split the numbers later on)

I managed to clean it and get a list like this:

['value1', 'value2', etc]

But, I am still struggling to transform it into actual integers to be sent to an RNBO unpack.

Any tips is helpful as I am totally new to Python and everything takes ages to figure out.

Many thanks,

Gabriele

Jan M

You are receiving byte values from the serial port, which is to be expected. The best approach is probably normalizing the values yo a (float) range of 0. to 1. and use the normalized OSC path to send them to RNBO. This way you don’t need to take care of the different parameter ranges.