Added separate ota config file based on the prj file.

Parameters are based on the zigbee light switch example from nrf-connect toolkit.

code/nrf-connect/samples/zigbee/prj_ota.conf

@@ -0,0 +1,89 @@
+
+CONFIG_LOG=y
+CONFIG_PWM=y
+CONFIG_I2C=y
+CONFIG_ADC=y
+CONFIG_GPIO=y
+
+CONFIG_USE_SEGGER_RTT=y
+CONFIG_SEGGER_RTT_BUFFER_SIZE_UP=4096
+
+CONFIG_NEWLIB_LIBC=y
+CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
+
+CONFIG_SERIAL=n
+
+CONFIG_HEAP_MEM_POOL_SIZE=2048
+CONFIG_MAIN_THREAD_PRIORITY=7
+
+CONFIG_ZIGBEE=y
+CONFIG_ZIGBEE_APP_UTILS=y
+CONFIG_ZIGBEE_ROLE_END_DEVICE=y
+
+# This example requires more workqueue stack
+CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048
+
+# Enable nRF ECB driver
+CONFIG_CRYPTO=y
+CONFIG_CRYPTO_NRF_ECB=y
+CONFIG_CRYPTO_INIT_PRIORITY=80
+
+# Networking
+CONFIG_NET_IPV6=n
+CONFIG_NET_IPV6_MLD=n
+CONFIG_NET_IPV6_NBR_CACHE=n
+CONFIG_NET_IPV6_RA_RDNSS=n
+CONFIG_NET_IP_ADDR_CHECK=n
+CONFIG_NET_UDP=n
+
+##
+## ZigBee Channel Selection
+##
+# Get Zigbee to scan every channel.
+CONFIG_ZIGBEE_CHANNEL_SELECTION_MODE_MULTI=y
+# By default only scans channel 11 (ZigBee2MQTT default) and 15 (ZHA default).
+# Comment to scan all channels - this will make pairing consume more energy.
+# CONFIG_ZIGBEE_CHANNEL_MASK=0x8800
+
+# Uncomment to set a specific channel - this will make pairing more energy efficient.
+# CONFIG_ZIGBEE_CHANNEL=15
+
+# Enable API for powering down unused RAM parts.
+# https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.7.1/nrf/ug_zigbee_configuring.html#power-saving-during-sleep
+CONFIG_RAM_POWER_DOWN_LIBRARY=y
+
+# LittleFS.
+CONFIG_MAIN_STACK_SIZE=2048
+CONFIG_FLASH=y
+CONFIG_FLASH_MAP=y
+CONFIG_FLASH_PAGE_LAYOUT=y
+CONFIG_FILE_SYSTEM=y
+CONFIG_FILE_SYSTEM_LITTLEFS=y
+
+CONFIG_WATCHDOG=y
+CONFIG_HWINFO=y
+CONFIG_ASSERT=y
+
+# Uncomment for debug log level.
+# CONFIG_LOG_DEFAULT_LEVEL=4
+
+# Factory reset method selection. Only hardware revision 2.0.0+ has button SW1. Earlier
+# revisions must select a different method. See Kconfig for options.
+# CONFIG_PRST_ZB_FACTORY_RESET_VIA_SW1=y
+# Disable factory reset.
+
+# OTA update configuration. This is based on the zigbee light switch example from the nrf-connect toolkit.
+CONFIG_ZIGBEE_FOTA=y
+CONFIG_ZIGBEE_FOTA_ENDPOINT=5
+CONFIG_MCUBOOT_IMGTOOL_SIGN_VERSION="1.0.0" # Increase this version for generating an update for the devices.
+CONFIG_ZIGBEE_FOTA_COMMENT="b_parasite"
+
+# Ensure an MCUboot-compatible binary is generated.
+CONFIG_IMG_MANAGER=y
+CONFIG_STREAM_FLASH=y
+CONFIG_DFU_TARGET_MCUBOOT=y
+CONFIG_IMG_ERASE_PROGRESSIVELY=y
+CONFIG_ZIGBEE_FOTA_PROGRESS_EVT=y
+
+# Increase the number of RX buffers
+CONFIG_NRF_802154_RX_BUFFERS=32