pluginfunction
/JSON?request=pluginfunction&function=FUNCTION_NAME&plugin=PLUGIN_NAME&instance=INSTANCE_NAME&P#-PN=PARAMETER
Calls a plugin function by name and returns the result. Paramers P1-P# are the parameters to the function. The instance can be left off for single instance plugins. For example, to call the Z-Wave plugin function Configuration_set:
/JSON?request=pluginfunction&function=Configuration_Set&plugin=Z-Wave&P1=00129835&P2=3&P3=4&P4=1&P5=30