PWM Command

Googling in the web, i found M0 and M1 commands to set the output level of PWM0 and PWM1 pin of the Xbee.

However in the recent documentation I have, nothing is said about this subject.

Can someone tell me if this feature is still available and provide me some
help, suggestions or link?

I need di set remotely the output level of a PWM output, using a remote AT command API.

Info on Xbee Modules I am using:

Xbee S2
H/W Version: 1945
S/W Version: 1247

I think I can upgrade the F/W version if needed.

Thank You.