--- a/sdkconfig	Sun Oct 21 23:12:08 2018 +0200
+++ b/sdkconfig	Mon Oct 22 21:43:45 2018 +0200
@@ -332,6 +332,25 @@
 CONFIG_FATFS_PER_FILE_CACHE=y
 
 #
+# Modbus configuration
+#
+CONFIG_MB_UART_RXD=22
+CONFIG_MB_UART_TXD=23
+CONFIG_MB_UART_RTS=18
+CONFIG_MB_QUEUE_LENGTH=20
+CONFIG_MB_SERIAL_TASK_STACK_SIZE=2048
+CONFIG_MB_SERIAL_BUF_SIZE=256
+CONFIG_MB_SERIAL_TASK_PRIO=10
+CONFIG_MB_CONTROLLER_SLAVE_ID_SUPPORT=
+CONFIG_MB_CONTROLLER_NOTIFY_TIMEOUT=20
+CONFIG_MB_CONTROLLER_NOTIFY_QUEUE_SIZE=20
+CONFIG_MB_CONTROLLER_STACK_SIZE=4096
+CONFIG_MB_EVENT_QUEUE_TIMEOUT=20
+CONFIG_MB_TIMER_PORT_ENABLED=y
+CONFIG_MB_TIMER_GROUP=0
+CONFIG_MB_TIMER_INDEX=0
+
+#
 # FreeRTOS
 #
 CONFIG_FREERTOS_UNICORE=