Ping pong sending to fix acknowledgement errors
Ping pong sending to fix acknowledgement errors

Might be a good solution for people affected by #166, #470, #490 until commRefactoring branch is ready for prime time. No solution for #553 since that needs proper queueing and blocking command detection.

EZ3-India/EZ-Remote,ErikDeBruijn/OctoPrint,alex1818/OctoPrint,dansantee/OctoPrint,mcanes/OctoPrint,JackGavin13/octoprint-test-not-finished,foosel/OctoPrint,nickverschoor/OctoPrint,Skeen/OctoPrint,mrbeam/OctoPrint,SeveQ/OctoPrint,eliasbakken/OctoPrint,mayoff/OctoPrint,nickverschoor/OctoPrint,markwal/OctoPrint,CapnBry/OctoPrint,bicephale/OctoPrint,senttech/OctoPrint,shohei/Octoprint,foosel/OctoPrint,leductan-nguyen/RaionPi,Salandora/OctoPrint,sstocker46/OctoPrint,punkkeks/OctoPrint,beeverycreative/BEEweb,SeveQ/OctoPrint,senttech/OctoPrint,MoonshineSG/OctoPrint,jneves/OctoPrint,uuv/OctoPrint,bicephale/OctoPrint,shohei/Octoprint,ErikDeBruijn/OctoPrint,Jaesin/OctoPrint,Voxel8/OctoPrint,uuv/OctoPrint,JackGavin13/octoprint-test-not-finished,markwal/OctoPrint,MaxOLydian/OctoPrint,nicanor-romero/OctoPrint,leductan-nguyen/RaionPi,alex1818/OctoPrint,leductan-nguyen/RaionPi,Javierma/OctoPrint-TFG,MaxOLydian/OctoPrint,EZ3-India/EZ-Remote,eddieparker/OctoPrint,eddieparker/OctoPrint,uuv/OctoPrint,ryanneufeld/OctoPrint,Skeen/OctoPrint,sstocker46/OctoPrint,shohei/Octoprint,foosel/OctoPrint,SeveQ/OctoPrint,beeverycreative/BEEweb,nicanor-romero/OctoPrint,beeverycreative/BEEweb,masterhou/OctoPrint,Voxel8/OctoPrint,Skeen/OctoPrint,mcanes/OctoPrint,Mikk36/OctoPrint,shaggythesheep/OctoPrint,MoonshineSG/OctoPrint,mayoff/OctoPrint,mrbeam/OctoPrint,CapnBry/OctoPrint,jneves/OctoPrint,Salandora/OctoPrint,dragondgold/OctoPrint,Voxel8/OctoPrint,ErikDeBruijn/OctoPrint,CapnBry/OctoPrint,chriskoz/OctoPrint,chriskoz/OctoPrint,shaggythesheep/OctoPrint,mayoff/OctoPrint,spapadim/OctoPrint,javivi001/OctoPrint,MoonshineSG/OctoPrint,chriskoz/OctoPrint,dansantee/OctoPrint,Mikk36/OctoPrint,bicephale/OctoPrint,Mikk36/OctoPrint,markwal/OctoPrint,CapnBry/OctoPrint,masterhou/OctoPrint,leductan-nguyen/RaionPi,EZ3-India/EZ-Remote,beeverycreative/BEEweb,shohei/Octoprint,Jaesin/OctoPrint,javivi001/OctoPrint,Salandora/OctoPrint,Salandora/OctoPrint,jneves/OctoPrint,JackGavin13/octoprint-test-not-finished,chriskoz/OctoPrint,nickverschoor/OctoPrint,foosel/OctoPrint,Jaesin/OctoPrint,spapadim/OctoPrint,dansantee/OctoPrint,javivi001/OctoPrint,nicanor-romero/OctoPrint,ryanneufeld/OctoPrint,shohei/Octoprint,Javierma/OctoPrint-TFG,nickverschoor/OctoPrint,Javierma/OctoPrint-TFG,JackGavin13/octoprint-test-not-finished,MaxOLydian/OctoPrint,senttech/OctoPrint,Javierma/OctoPrint-TFG,punkkeks/OctoPrint,eliasbakken/OctoPrint,MoonshineSG/OctoPrint,ryanneufeld/OctoPrint,mcanes/OctoPrint,dragondgold/OctoPrint,dragondgold/OctoPrint,alex1818/OctoPrint,eliasbakken/OctoPrint,mrbeam/OctoPrint,eddieparker/OctoPrint,senttech/OctoPrint,punkkeks/OctoPrint,spapadim/OctoPrint,EZ3-India/EZ-Remote,bicephale/OctoPrint,shaggythesheep/OctoPrint,Jaesin/OctoPrint,masterhou/OctoPrint,sstocker46/OctoPrint,ryanneufeld/OctoPrint