mirror of
https://gitee.com/dgiiot/dgiot.git
synced 2024-12-11 10:05:34 +08:00
177 lines
6.4 KiB
Erlang
177 lines
6.4 KiB
Erlang
%%--------------------------------------------------------------------
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%% Copyright (c) 2020-2021 DGIOT Technologies Co., Ltd. All Rights Reserved.
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%%
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%% Licensed under the Apache License, Version 2.0 (the "License");
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%% you may not use this file except in compliance with the License.
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%% You may obtain a copy of the License at
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%%
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%% http://www.apache.org/licenses/LICENSE-2.0
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%%
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%% Unless required by applicable law or agreed to in writing, software
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%% distributed under the License is distributed on an "AS IS" BASIS,
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%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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%% See the License for the specific language governing permissions and
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%% limitations under the License.
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%%--------------------------------------------------------------------
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%%%-------------------------------------------------------------------
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%%% @copyright (C) 2019, <dgiot>
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%%% @doc
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%%% DTU通用协议解析
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%% DTU设置
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%% 1.注册包
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%% a. 在连接时发送; b.在每一数据包前加注册包
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%% 注册包格式：ASCII LOGIN 000002\r\n
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%% 2.心跳
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%% a. 心跳时间设置; b.心跳数据包。
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%% 心跳包格式：ASCII HEART\r\n
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%%% @end
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%%% Created : 08. 十一月 2018 14:49
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%%%-------------------------------------------------------------------
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%% 奇迹物联
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%% AT+HELP
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%% AT+HEART=27,6805484541525468
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%% AT+LINK=680630303030303168
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%% AT+CIPSTART=TCP,132.232.121.164,21110
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%% AT+DOMAIN=13250820701.zicp.vip
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%% AT+LinkFlag1=0
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%% AT+LinkFlag2=1
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%% AT+HeartFlag=1
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%% AT+NetFlag=1
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%% AT+BPR232=2400,8,2,1
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%% AT+BPR485=9600,8,0,1
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-module(dtu_decoder).
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-behavior(dgiot_decoder).
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-export([init/2, handle_info/2, parse_frame/2, to_frame/2]).
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init(_ChannelId, State) ->
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{ok, State#{<<"auto">> => true}}.
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handle_info({message, #{<<"cmd">> := <<"LOGIN">>, <<"addr">> := Addr}}, #{<<"productId">> := ProductId, <<"channelId">> := ChannelId, <<"auto">>:= Auto} = State) ->
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dgiot_bridge:send_log(ChannelId, ProductId, "DTU ~p Login", [Addr]),
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dgiot_utils:subscribe(<<"thing/", ProductId/binary, "/", Addr/binary>>),
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Auto andalso erlang:send_after(5000, self(), check),
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{ok, State#{<<"addr">> => Addr}};
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handle_info({message, #{<<"cmd">> := <<"HEART">>}}, #{ <<"addr">> := Addr, <<"productId">> := ProductId, <<"channelId">> := ChannelId} = State) ->
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dgiot_bridge:send_log(ChannelId, ProductId, "DTU ~p HEART", [Addr]),
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{ok, State};
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handle_info({message, #{<<"subAddr">> := SubAddr} = Frame}, #{ <<"addr">> := Addr, <<"channelId">> := ChannelId, <<"productId">> := ProductId} = State) ->
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Devices = maps:get(<<"devices">>, State, #{}),
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case maps:get(SubAddr, Devices, no) of
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no ->
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dgiot_bridge:send_log(ChannelId, ProductId, "DTU:~p online Recv ~s", [Addr, jsx:encode(Frame)]),
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{ok, State#{<<"devices">> => Devices#{SubAddr => true}}};
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true ->
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dgiot_bridge:send_log(ChannelId, ProductId, "DTU:~p Recv ~s", [Addr, jsx:encode(Frame)]),
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{ok, State}
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end;
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handle_info(check, #{<<"send">> := Send} = State) ->
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erlang:send_after(1000, self(), next),
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{reply, Payload} = to_frame(#{<<"subAddr">> => <<"1">>}, State),
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Send(Payload),
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{ok, State};
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handle_info(next, #{<<"send">> := Send} = State) ->
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erlang:send_after(5000, self(), three),
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{reply, Payload} = to_frame(#{<<"subAddr">> => <<"2">>}, State),
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Send(Payload),
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{ok, State};
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handle_info(three, #{<<"send">> := Send} = State) ->
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erlang:send_after(5000, self(), check),
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{reply, Payload} = to_frame(#{<<"subAddr">> => <<"3">>}, State),
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Send(Payload),
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{ok, State};
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handle_info(_Info, _State) ->
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?LOG(info,"~p~n", [_Info]),
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ok.
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parse_frame(Buff, State) ->
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parse_frame(Buff, State, []).
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parse_frame(<<>>, _State, Acc) ->
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{<<>>, Acc};
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parse_frame(<<"LOGIN ", Rest/binary>>, State, Acc) ->
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case parse_login(Rest) of
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{ok, Addr, Rest1} ->
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Frame = #{
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<<"cmd">> => <<"LOGIN">>,
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<<"addr">> => Addr
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},
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parse_frame(Rest1, State, Acc ++ [Frame]);
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error ->
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parse_frame(Rest, State, Acc)
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end;
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parse_frame(<<"LOGIN", Rest/binary>>, State, Acc) ->
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parse_frame(<<"LOGIN ", Rest/binary>>, State, Acc);
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parse_frame(<<"HEART\\r\\n", Rest/binary>>, State, Acc) ->
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Frame = #{
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<<"cmd">> => <<"HEART">>
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},
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parse_frame(Rest, State, Acc ++ [Frame]);
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parse_frame(<<Addr:8, Fn:8, Len:8, Rest/binary>>, State, Acc) when Fn == 3, byte_size(Rest) >= Len + 2 ->
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<<Data:Len/binary, CRC:2/binary, Rest1/binary>> = Rest,
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case dgiot_utils:crc16(<<Addr:8, Fn:8, Len:8, Data:Len/binary>>) == CRC of
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true ->
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Frame = #{
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<<"subAddr">> => integer_to_binary(Addr),
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<<"data">> => Data
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},
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parse_userzone(Frame, Rest1, State, Acc);
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false ->
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parse_frame(Rest1, State, Acc)
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end;
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parse_frame(<<_:8, Rest/binary>>, State, Acc) ->
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parse_frame(Rest, State, Acc).
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%% 针对不同设备地址作不同协议解析
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%% 设备为1,2 为奥松温度传感器
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parse_userzone(#{ <<"subAddr">> := SubAddr, <<"data">> := Data}, Buff, State, Acc)
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when SubAddr == <<"1">>; SubAddr == <<"2">> ->
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<<Humidity:16, Temperature:16>> = Data,
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NewFrames = [#{
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<<"subAddr">> => SubAddr,
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<<"data">> => #{
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<<"temperature">> => Temperature / 10,
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<<"humidity">> => Humidity / 10
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}
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}],
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parse_frame(Buff, State, Acc ++ NewFrames);
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parse_userzone(#{ <<"subAddr">> := SubAddr, <<"data">> := Data}, Buff, State, Acc) ->
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parse_frame(Buff, State, [#{
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<<"subAddr">> => SubAddr,
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<<"data">> => dgiot_utils:binary_to_hex(Data)
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} | Acc]).
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%% 组装成封包, 参数为Map形式
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%% 设备为1 为奥松温度传感器
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to_frame(#{<<"subAddr">> := Addr}, _State) when Addr == <<"1">>; Addr == <<"2">> ->
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IntAddr = binary_to_integer(Addr),
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Bin = <<IntAddr:8, 16#03, 0:16, 2:16>>,
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CRC = dgiot_utils:crc16(Bin),
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{reply, <<Bin/binary, CRC/binary>>};
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to_frame(#{<<"subAddr">> := Addr }, _State) ->
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IntAddr = binary_to_integer(Addr),
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Bin = <<IntAddr:8, 16#03, 0:16, 2:16>>,
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CRC = dgiot_utils:crc16(Bin),
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{reply, <<Bin/binary, CRC/binary>>}.
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parse_login(Buff) -> parse_login(Buff, <<>>).
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parse_login(<<>>, _Acc) -> error;
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parse_login(<<"\\r\\n", Rest/binary>>, Acc) -> {ok, Acc, Rest};
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parse_login(<<B:8, Rest/binary>>, Acc) -> parse_login(Rest, <<Acc/binary, B:8>>).
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