########################################
# DataFurt Bridge Configuration
# Modbus TCP -> OPC UA
########################################

[source]
type = "modbus"  # Modbus TCP only - Modbus RTU/serial is not supported.


# Specify the host and port of the HTTP server.

host = "192.168.1.10"
port = 502


# Slave/unit id (0-255) of the device. Must match the id configured on the
# device itself.

unit_id = 1


# Socket read/write timeout in seconds.

timeout = 5


# Word order for 32-bit values (uint32, int32, float32) split across two
# registers. Most devices use "high_first". Switch to "low_first" if your
# readings look byte-swapped.

word_order = "high_first"


# Poll interval in seconds.

delay = 2


# Specify the registers to poll. Format:
# "<coil|discrete|holding|input>:<address>[:<data_type>]". The data type
# (holding/input only) defaults to "uint16"; other options are "int16",
# "uint32", "int32" and "float32".

registers = ["holding:0", "coil:5"]


# DataFurt Bridge places received messages in a forwarding queue before
# processing and sending them to the target system. It absorbs differences
# between source and target processing speeds, keeping sources responsive
# during short target interruptions or temporary bursts of incoming data.
# While the target is disconnected, queued messages wait until it
# reconnects. Adjust the queue size (maximum number of messages that can
# wait to be processed) and the queue overflow behavior ('drop_newest' or
# 'drop_oldest') according to your system's capacity and workload
# requirements.

queue_size = 1000
queue_overflow = "drop_newest"


# (Optional) Transformer function to modify data via JavaScript between the
# source and target systems.

transformer = "./modbus-opcua-transformer.js"


[target]
type = "opcua"


# OPC UA server endpoint URL. Only supports the opc.tcp scheme.

endpoint_url = "opc.tcp://opcua.example.com:51210/UA/SampleServer"


# Security mode for the connection. Possible values: "none", "sign" and
# "sign_and_encrypt". "sign" is a good default; use "none" only on trusted
# networks.

security_mode = "sign"


# Security policy, only relevant when security_mode isn't "none".
# Possible values are 'basic256sha256', 'aes128_sha256_rsaoaep', and
# 'aes256_sha256_rsapss'.

security_policy = "basic256sha256"


# For testing, you can trust the server certificate explicitly (not
# recommended for production).

trust_server_certificate = false


# Uncomment 'username' and either 'password' or 'password_env' to enable
# authentication (otherwise the client will connect anonymously). For testing
# purposes, it's easier to specify the password directly here in plain text. In
# production, use an environment variable instead.

#username = "username"
#password = "password"
#password_env = "MY_ENV_VARIABLE_HOLDING_THE_PASSWORD"


# Directory used to store DataFurt Bridge's own OPC UA client certificate
# and the trusted/rejected server certificate stores.

pki_path = "./pki"


# Uncomment to specify your own OPC UA client ID. Otherwise, a random one is
# generated.

#client_id = "my-custom-client-id"


# Requested OPC UA session timeout in seconds.

session_timeout_seconds = 60


# Interval in seconds at which DataFurt Bridge checks that the OPC UA
# session is still alive.

keep_alive_seconds = 5