How to Reduce Application Code Size

Gettng your application to fit in an image slot can be challenging, particularly on flash constrained hardware such as the nRF51. Below are some suggested system configuration settings that reduce the code size of your Mynewt image.

Setting	Description
LOG_LEVEL: 255	Disable all logging.
LOG_CLI: 0	Disable log shell commands.
STATS_CLI: 0	Disable stats shell commands.
SHELL_TASK: 0	Disable the interactive shell.
SHELL_OS_MODULE: 0	Disable memory management shell commands.
SHELL_CMD_HELP: 0	Disable help for shell commands.

You can use the newt target set command to set the syscfg settings in the syscfg.yml file for the target. See the Newt Tool Command Guide for the command syntax.

Note: The newt target set command deletes all the current syscfg settings in the target syscfg.yml file and only sets the syscfg settings specified in the command. If you are experimenting with different settings to see how they affect the code size and do not want to reenter all the setting values in the newt target set command, you can use the newt target amend command. This command adds or updates only the settings specified in the command and does not overwrite other setting values. While you can also edit the target syscfg.yml file directly, we recommend that you use the newt target commands.