It would be use full to allow easy send and read for handling process

Methods like

Send Input To Process | ${handle} | String
This keyword allow to send string to process

Read Output From Process | | ${handle} | wait_for_line=${True} | ${minimum of line}=1
This keyword allow to read latest not read yet output, with option to wait for line of ouput. This last option will make code cleaner

Example Use
${handle} | Run Process | command | stdin=PIPE | stdout=PIPE
Send Input To Process | ${handle} | String
${line} | Read Output From Process | | ${handle} | wait_for_line=${True} | ${minimum of line}=1
Log | ${line} | Debug