|
| 1 | +package charger |
| 2 | + |
| 3 | +import ( |
| 4 | + "bytes" |
| 5 | + "encoding/binary" |
| 6 | + "encoding/json" |
| 7 | + "errors" |
| 8 | + "fmt" |
| 9 | + "net" |
| 10 | + "strings" |
| 11 | + "time" |
| 12 | + |
| 13 | + "github.com/andig/evcc/api" |
| 14 | + "github.com/andig/evcc/internal/charger/tplink" |
| 15 | + "github.com/andig/evcc/util" |
| 16 | +) |
| 17 | + |
| 18 | +// TPLink charger implementation |
| 19 | +type TPLink struct { |
| 20 | + uri string |
| 21 | + standbypower float64 |
| 22 | +} |
| 23 | + |
| 24 | +func init() { |
| 25 | + registry.Add("tplink", NewTPLinkFromConfig) |
| 26 | +} |
| 27 | + |
| 28 | +// NewTPLinkFromConfig creates a TP-Link charger from generic config |
| 29 | +func NewTPLinkFromConfig(other map[string]interface{}) (api.Charger, error) { |
| 30 | + cc := struct { |
| 31 | + URI string |
| 32 | + StandbyPower float64 |
| 33 | + }{} |
| 34 | + |
| 35 | + if err := util.DecodeOther(other, &cc); err != nil { |
| 36 | + return nil, err |
| 37 | + } |
| 38 | + |
| 39 | + if cc.URI == "" { |
| 40 | + return nil, errors.New("missing uri") |
| 41 | + } |
| 42 | + |
| 43 | + return NewTPLink(cc.URI, cc.StandbyPower) |
| 44 | +} |
| 45 | + |
| 46 | +// NewTPLink creates TP-Link charger |
| 47 | +func NewTPLink(uri string, standbypower float64) (*TPLink, error) { |
| 48 | + c := &TPLink{ |
| 49 | + uri: net.JoinHostPort(uri, "9999"), |
| 50 | + standbypower: standbypower, |
| 51 | + } |
| 52 | + return c, nil |
| 53 | +} |
| 54 | + |
| 55 | +// Enabled implements the Charger.Enabled interface |
| 56 | +func (c *TPLink) Enabled() (bool, error) { |
| 57 | + sysResp, err := c.execCmd(`{"system":{"get_sysinfo":null}}`) |
| 58 | + if err != nil { |
| 59 | + return false, err |
| 60 | + } |
| 61 | + |
| 62 | + var systemResponse tplink.SystemResponse |
| 63 | + if err := json.Unmarshal(sysResp, &systemResponse); err != nil { |
| 64 | + return false, err |
| 65 | + } |
| 66 | + |
| 67 | + if err := systemResponse.System.GetSysinfo.ErrCode; err != 0 { |
| 68 | + return false, fmt.Errorf("get_sysinfo error %d", err) |
| 69 | + } |
| 70 | + |
| 71 | + if !strings.Contains(systemResponse.System.GetSysinfo.Feature, "ENE") { |
| 72 | + return false, errors.New(systemResponse.System.GetSysinfo.Model + " not supported, energy meter feature missing") |
| 73 | + } |
| 74 | + |
| 75 | + return int(1) == systemResponse.System.GetSysinfo.RelayState, err |
| 76 | +} |
| 77 | + |
| 78 | +// Enable implements the Charger.Enable interface |
| 79 | +func (c *TPLink) Enable(enable bool) error { |
| 80 | + cmd := `{"system":{"set_relay_state":{"state":0}}}` |
| 81 | + if enable { |
| 82 | + cmd = `{"system":{"set_relay_state":{"state":1}}}` |
| 83 | + } |
| 84 | + |
| 85 | + // Execute TP-Link set_relay_state command |
| 86 | + sysResp, err := c.execCmd(cmd) |
| 87 | + if err != nil { |
| 88 | + return err |
| 89 | + } |
| 90 | + |
| 91 | + var systemResponse tplink.SystemResponse |
| 92 | + if err := json.Unmarshal(sysResp, &systemResponse); err != nil { |
| 93 | + return err |
| 94 | + } |
| 95 | + |
| 96 | + if err := systemResponse.System.SetRelayState.ErrCode; err != 0 { |
| 97 | + return fmt.Errorf("set_relay_state error %d", err) |
| 98 | + } |
| 99 | + |
| 100 | + return nil |
| 101 | +} |
| 102 | + |
| 103 | +// MaxCurrent implements the Charger.MaxCurrent interface |
| 104 | +func (c *TPLink) MaxCurrent(current int64) error { |
| 105 | + return nil |
| 106 | +} |
| 107 | + |
| 108 | +// Status implements the Charger.Status interface |
| 109 | +func (c *TPLink) Status() (api.ChargeStatus, error) { |
| 110 | + power, err := c.CurrentPower() |
| 111 | + |
| 112 | + switch { |
| 113 | + case power > 0: |
| 114 | + return api.StatusC, err |
| 115 | + default: |
| 116 | + return api.StatusB, err |
| 117 | + } |
| 118 | +} |
| 119 | + |
| 120 | +var _ api.Meter = (*TPLink)(nil) |
| 121 | + |
| 122 | +// CurrentPower implements the api.Meter interface |
| 123 | +func (c *TPLink) CurrentPower() (float64, error) { |
| 124 | + emeResp, err := c.execCmd(`{"emeter":{"get_realtime":null}}`) |
| 125 | + if err != nil { |
| 126 | + return 0, err |
| 127 | + } |
| 128 | + |
| 129 | + var emeterResponse tplink.EmeterResponse |
| 130 | + if err := json.Unmarshal(emeResp, &emeterResponse); err != nil { |
| 131 | + return 0, err |
| 132 | + } |
| 133 | + if err := emeterResponse.Emeter.GetRealtime.ErrCode; err != 0 { |
| 134 | + return 0, fmt.Errorf("get_realtime error %d", err) |
| 135 | + } |
| 136 | + |
| 137 | + power := emeterResponse.Emeter.GetRealtime.PowerMw / 1000 |
| 138 | + if power == 0 { |
| 139 | + power = emeterResponse.Emeter.GetRealtime.Power |
| 140 | + } |
| 141 | + |
| 142 | + // ignore standby power |
| 143 | + if power < c.standbypower { |
| 144 | + power = 0 |
| 145 | + } |
| 146 | + |
| 147 | + return power, err |
| 148 | +} |
| 149 | + |
| 150 | +// execCmd executes an TP-Link Smart Home Protocol command and provides the response |
| 151 | +func (c *TPLink) execCmd(cmd string) ([]byte, error) { |
| 152 | + // encode command message |
| 153 | + buf := bytes.NewBuffer([]byte{0, 0, 0, 0}) |
| 154 | + var ekey byte = 171 // initialization vector |
| 155 | + for i := 0; i < len(cmd); i++ { |
| 156 | + ekey = ekey ^ cmd[i] |
| 157 | + _ = buf.WriteByte(ekey) |
| 158 | + } |
| 159 | + |
| 160 | + // write 4 bytes to start of buffer with command length |
| 161 | + binary.BigEndian.PutUint32(buf.Bytes(), uint32(buf.Len()-4)) |
| 162 | + |
| 163 | + // open connection via TP-Link Smart Home Protocol |
| 164 | + conn, err := net.DialTimeout("tcp", c.uri, 5*time.Second) |
| 165 | + if err != nil { |
| 166 | + return nil, err |
| 167 | + } |
| 168 | + defer conn.Close() |
| 169 | + |
| 170 | + // send command |
| 171 | + if _, err = buf.WriteTo(conn); err != nil { |
| 172 | + return nil, err |
| 173 | + } |
| 174 | + |
| 175 | + // read response |
| 176 | + resp := make([]byte, 2048) |
| 177 | + n, err := conn.Read(resp) |
| 178 | + if err != nil { |
| 179 | + return nil, err |
| 180 | + } |
| 181 | + |
| 182 | + // decode response message |
| 183 | + var dkey byte = 171 // initialization vector |
| 184 | + for i := 4; i < n; i++ { |
| 185 | + dec := dkey ^ resp[i] |
| 186 | + dkey = resp[i] |
| 187 | + _ = buf.WriteByte(dec) |
| 188 | + } |
| 189 | + |
| 190 | + return buf.Bytes(), nil |
| 191 | +} |
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