I have 2 x Deco M9 Plus providing great coverage throughout the house and near garden but I need coverage for a carport some 27m away (line of sight from nearest indoor M9 Plus)  -  Is there a TP-Link outdoor unit that can handle down to say -20C, is wireless compatible with the M9 Plus mesh wifi and can connect over 27m? 
I'm not too fussed about speed drop due to the longer distance as it's mainly for low bandwidth M2M communication, just want it to work.