Format strings and callback functions for both directions

[ste7anste7an]

https://github.com/antonvh/PUPRemote/blob/7cffd7331b237a5f96c6d25186238bdeab2b913b/LPF2/pupremote.py#L48

When a mode is assigned to e.g. a gyro sensor, the reading could be formatted as HHH (for pitch, rol, yaw). The hub could send data to the sensor to set specific registers in the sensor. This could be e.g. BB for (register, value). return_format not clear for which direction this is.

Proposal: optional format, or use empty string when format is not used.

def add_command(self, command: callable, mode_name: str, format_pup_to_hub: str, *argv):
if argv:
   format_hub_to_pup=argv[0]
   callback = argv[1]

Example:

def gyro():
  p,r,y=read_gyro()
  return p,r,y

def set_gyro(reg,val):
  set_gyro_reg(reg,val)

def led(nr,r,g,b):
   set_neopixel(nr,r,g,b)

pup.add_command(gyro,'gyro','HHH','BB',set_gyro) 
pup.add_command(NULL,'led',','BB',set_led)     

To do: There are also modes that are only used to send messages frpom hub to pup, and not the otherway arround. Make command=Null and format_pup_to_hub=''

[ste7anste7an]

Implemented in new code