Modbus mapper refactor (#2282)

* Add modbus mapper.

* Add modbus mapper.

* Address comments.
1. Set client to each RTU port instead of each RTU device.
2. Add README
3. Refine the dockerfile

* Refine device instance & model example files.

* Fix verify and lint issues.

* Address lint & verify issues.

* Add license

* Remove whitenoise

* Fix error

* Address lint errors

* Refine as the Fisher's comment

* Remove serial license

* Add more license

* Address conflict

2 files changed, 53 insertions, 0 deletions

diff --git a/LICENSES/vendor/github.com/goburrow/serial/LICENSE b/LICENSES/vendor/github.com/goburrow/serial/LICENSE
new file mode 100644
index 000000000..8472abbf2
--- /dev/null
+++ b/LICENSES/vendor/github.com/goburrow/serial/LICENSE
@@ -0,0 +1,23 @@
+= vendor/github.com/goburrow/serial licensed under: =
+
+Copyright (c) 2015 Quoc-Viet Nguyen
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
+= vendor/github.com/goburrow/serial/LICENSE e3ed29e54df09863b3c510034ff9c4a3
diff --git a/LICENSES/vendor/github.com/sailorvii/modbus/LICENSE b/LICENSES/vendor/github.com/sailorvii/modbus/LICENSE
new file mode 100644
index 000000000..fc71b681f
--- /dev/null
+++ b/LICENSES/vendor/github.com/sailorvii/modbus/LICENSE
@@ -0,0 +1,30 @@
+= vendor/github.com/sailorvii/modbus licensed under: =
+
+Copyright (C) 2014 Quoc-Viet Nguyen
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation  and/or other materials provided with the distribution.
+3. Neither the names of the copyright holders nor the names of any
+   contributors may be used to endorse or promote products derived from this
+   software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+
+= vendor/github.com/sailorvii/modbus/LICENSE 4f2d8e6bee7c0a27a06df40c6220e667