searching for a device displaying parameter value (& name)

it's a remote script I've made for a BCR2000, that handle volume, sends and devices,
and there is already in it a call (on start and on every changing of devices) that list a lot of devices, so I've added the detection of the max device in this call :

def set_instrument(self,t,i):
    chd=[]
    trg=[]
    o=[]
    a=[]
    f=[]
    e=[]
    x=[]
    l=[]
    
    def get_dev_list(devs_list):
        r=[]
        for dev in devs_list:
            r.append(dev)
            if dev.can_have_chains:
                for c in dev.chains:
                    r.extend(get_dev_list(c.devices))
        return r
 
    if t in self.song().tracks:
        for d in get_dev_list(t.devices):
            b=parameter_banks(d)
            if 'show'in d.name:
                for y in d.parameters:
                    if 'dial'in y.name:
                        self.show_parameter=y
                        

self.show_parameter at the end is the dial of the max device
(it's maybe here that I can find another parameter that receive text)

and then, as there were already a listener on encoders, I've added the sending trick to the max's dial:

@subject_slot_group('value')
def on_econtrols_value_changed(self,*a,**k):
    for x in a:
        if x in self.econtrols:
            o=x._orig_buttons[a[2]][a[1]]if isinstance(x,ButtonMatrixElement)else x
            if o.mapped_parameter():
                p=o.mapped_parameter()
                #self.show_message('            '+str(p.name)+'   '+str(p)+'   ')
                if p and p.is_enabled and self.show_parameter:
                    self._tasks.add(Task.run(lambda:self.show_parameter_value(p)))
 

def show_parameter_value(self,p):
    self.show_parameter.value=((p.value-(p.min if not p.is_quantized and p.min<0 else 0))/float(p.max-p.min))*127

just setting the self.show_parameter.value is enough to change the dial value

and there was also those 2 lines in some other place in the script :
(to set the listener on the encoders)

self.econtrols=[self._vol_enc,self._dev_enc,self._sse_enc,self._svo_enc,self._sld_par_enc]


self.on_econtrols_value_changed.replace_subjects(self.econtrols)