How to send command to specific pane in tmux

I was looking for a way of launching process in tmux split screen mode where one part of the terminal shows log entries and another starting sequence. I found a script in internet but was having problems locating a pane. So first I had to figure out correct pane locations. To do this execute following command:

tmux list-panes –a

This gave me indication that window id is equal 1 and not 0 as indicated in tmux status bar.

Then it went easy, just go with following bash script:

#!/bin/bash

session="my name"

window=${session}:1

pane=${window}.1

echo $pane

tmux send-keys -t "$pane" C-z 'test cmd 1' Enter

tmux send-keys -t "$pane" 'test cmd 2' Enter