+The `device_id` command triggers the VI to inject a unique device ID (e.g. the
+MAC address of an included Bluetooth module) into into the outgoing data stream.
+
+**Request**
+
+ { "command": "device_id"}
+
+**Response**
+
+ { "command_response": "device_id", "message": "0012345678"}
+
+#### Passthrough CAN Mode
+
+The `passthrough` command controls whether low-level CAN messages are passed
+through from the CAN bus through the VI to the output stream. If the CAN
+acceptance filter is in bypass mode and passthrough is enabled, the output
+stream will include all received CAN messages. If the bypass filter is enabled,
+only those CAN messages that have been pre-defined in the firmware are
+forwarded.
+
+**Request**
+
+ { "command": "passthrough",
+ "bus": 1,
+ "enabled": true
+ }
+
+**Response**
+
+If the bus in the request was valid and the passthrough mode was changed, the
+`status` field in the response will be `true`. If `false`, the passthrough mode
+was not changed.
+
+ { "command_response": "passthrough", "status": true}
+
+#### Acceptance Filter Bypass
+
+The `af_bypass` command controls whether the CAN message acceptance filter is
+bypassed for each CAN controller. By default, hardware acceptance filter (AF) is
+enabled in the VI - only previously defined CAN message IDs will be received.
+Send this command with `bypass: true` to force the filters to bypassed.
+
+If `passthrough` mode is also enabled, when the AF is bypassed, the output will
+include all CAN messages received.
+
+**Request**
+
+ { "command": "af_bypass",
+ "bus": 1,
+ "bypass": true
+ }
+
+**Response**
+
+If the bus in the request was valid and the AF mode was changed, the `status`
+field in the response will be `true`. If `false`, the passthrough mode was not
+changed.
+
+ { "command_response": "af_bypass", "status": true}
+
+#### Payload Format Control
+
+The `payload_format` command determines the format for output data from the VI
+and the expected format of commands sent to the VI.
+
+Valid formats are `json` and `protobuf`.
+
+**Request**
+
+ { "command": "payload_format",
+ "format": "json"
+ }
+
+**Response**
+
+If the format was changed successfully, the `status` in the response will be
+`true`. The response will be in the original message format, and all subsequent
+messages will be in the new format.
+
+ { "command_response": "payload_format", "status": true}
+
+
+### Trace File Format