How to reduce the size of an executable file?

Hello,

I have modified the central_uart example to make the nRF52832 communicate with an ESP32 in MessagePack. After having disabled the logger configuration in the proj.conf file the size of the *.bin file is 225.8 kB which is too large for an nRF52805 (flash of 192 kB). Is there any way to reduce the bin file size?

Below the proj.conf file:

#
# Copyright (c) 2018 Nordic Semiconductor
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#

# Enable the UART driver
CONFIG_UART_ASYNC_API=y
CONFIG_NRFX_UARTE0=y
CONFIG_SERIAL=y
CONFIG_CONSOLE=y
CONFIG_UART_CONSOLE=y

# Enable the BLE stack with GATT Client configuration
CONFIG_BT=y
CONFIG_BT_CENTRAL=y
CONFIG_BT_SMP=y
CONFIG_BT_GATT_CLIENT=y

# Enable the BLE modules from NCS
CONFIG_BT_NUS_CLIENT=y
CONFIG_BT_SCAN=y
CONFIG_BT_SCAN_FILTER_ENABLE=y
CONFIG_BT_SCAN_UUID_CNT=1
CONFIG_BT_SCAN_ADDRESS_CNT=1
CONFIG_BT_GATT_DM=y
CONFIG_HEAP_MEM_POOL_SIZE=2048
CONFIG_BT_MAX_PAIRED=1
CONFIG_BT_MAX_CONN=1

# This example requires more workqueue stack
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048

# Enable bonding
CONFIG_BT_SETTINGS=y
CONFIG_FLASH=y
CONFIG_FLASH_PAGE_LAYOUT=y
CONFIG_FLASH_MAP=y
CONFIG_NVS=y
CONFIG_SETTINGS=y

# Enable use of the non-minimal C functionality (stdio.h).
CONFIG_NEWLIB_LIBC=y

# Config logger
CONFIG_LOG=n
CONFIG_USE_SEGGER_RTT=y
CONFIG_LOG_BACKEND_RTT=n
CONFIG_LOG_BACKEND_UART=n
CONFIG_LOG_PRINTK=n
CONFIG_BT_DEBUG_LOG=n
CONFIG_BT_GATT_DM_DATA_PRINT=n

CONFIG_ASSERT=y

# Config I2C
CONFIG_GPIO=y
CONFIG_I2C=y
CONFIG_I2C_NRFX=y

CONFIG_SHELL=y
CONFIG_I2C_SHELL=y

Regards,

Marco

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