tree d0a88fbee3e1094108bdb8479f6fa8ddc7cff402
parent 3bcd14f420508e5eea4cea1f333e37d0a6ac4ff9
author Jeppe Odgaard <jeppe.odgaard@prevas.dk> 1656574704 +0200
committer Carles Cufí <carles.cufi@nordicsemi.no> 1656764149 +0200

drivers: modem: delay after each AT command

Change logic in `modem_cmd_handler_setup_cmds` and
`modem_cmd_handler_setup_cmds_nolock` to always sleep
after each sent AT command.

The issue was found using a logic analyzer while debugging 'NO CARRIER'
from a BG95 modem while being in data mode.
The reason 'NO CARRIER' occured was due to crosstalk to DTR which
terminated data mode.

The logic analyzer also revealed that without the delay the next AT
command is sent before the whole 'OK\r\n' is received. This is not
addressed in this commit.

Fixes https://github.com/zephyrproject-rtos/zephyr/issues/47082

Signed-off-by: Jeppe Odgaard <jeppe.odgaard@prevas.dk>