initial implementation for Powerwall control

energysite.go

@@ -0,0 +1,116 @@
+package tesla
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// this represents site_info endpoint
+type EnergySite struct {
+	ID                   string `json:"id"`
+	SiteName             string `json:"site_name"`
+	BackupReservePercent int64  `json:"backup_reserve_percent,omitempty"`
+	DefaultRealMode      string `json:"default_real_mode,omitempty"`
+
+	productId int64
+	c         *Client
+}
+
+type EnergySiteStatus struct {
+	ResourceType      string  `json:"resource_type"`
+	SiteName          string  `json:"site_name"`
+	GatewayId         string  `json:"gateway_id"`
+	EnergyLeft        float64 `json:"energy_left"`
+	TotalPackEnergy   uint64  `json:"total_pack_energy"`
+	PercentageCharged float64 `json:"percentage_charged"`
+	BatteryType       string  `json:"battery_type"`
+	BackupCapable     bool    `json:"backup_capable"`
+	BatteryPower      int64   `json:"battery_power"`
+
+	c *Client
+}
+
+type SiteInfoResponse struct {
+	Response *EnergySite `json:"response"`
+}
+
+type SiteStatutsResponse struct {
+	Response *EnergySiteStatus `json:"response"`
+}
+
+// SiteCommandResponse is the response from the Tesla API after POSTing a command.
+type SiteCommandResponse struct {
+	Response struct {
+		Code    int    `json:"code"`
+		Message string `json:"message"`
+	} `json:"response"`
+}
+
+// return fetches the energy site for the given product ID
+func (c *Client) EnergySite(productID int64) (*EnergySite, error) {
+	siteInfoResponse := &SiteInfoResponse{}
+	if err := c.getJSON(c.baseURL+"/energy_sites/"+strconv.FormatInt(productID, 10)+"/site_info", siteInfoResponse); err != nil {
+		return nil, err
+	}
+	siteInfoResponse.Response.c = c
+	siteInfoResponse.Response.productId = productID
+	return siteInfoResponse.Response, nil
+}
+
+func (s *EnergySite) EnergySiteStatus() (*EnergySiteStatus, error) {
+	siteStatusResponse := &SiteStatutsResponse{}
+	if err := s.c.getJSON(s.statusPath(), siteStatusResponse); err != nil {
+		return nil, err
+	}
+	siteStatusResponse.Response.c = s.c
+	return siteStatusResponse.Response, nil
+}
+
+func (s *EnergySite) basePath() string {
+	return strings.Join([]string{s.c.baseURL, "energy_sites", strconv.FormatInt(s.productId, 10)}, "/")
+}
+
+func (s *EnergySite) statusPath() string {
+	return strings.Join([]string{s.basePath(), "site_status"}, "/")
+}
+
+func (s *EnergySite) SetBatteryReserve(percent uint64) error {
+	url := s.basePath() + "/backup"
+	payload := fmt.Sprintf(`{"backup_reserve_percent":%d}`, percent)
+	body, err := s.sendCommand(url, []byte(payload))
+	if err != nil {
+		return err
+	}
+
+	response := SiteCommandResponse{}
+	if err := json.Unmarshal(body, &response); err != nil {
+		return err
+	}
+
+	if response.Response.Code != 201 {
+		return fmt.Errorf("batteryReserve failed: %s", response.Response.Message)
+	}
+
+	return nil
+}
+
+// Sends a command to the vehicle
+func (s *EnergySite) sendCommand(url string, reqBody []byte) ([]byte, error) {
+	body, err := s.c.post(url, reqBody)
+	if err != nil {
+		return nil, err
+	}
+	if len(body) > 0 {
+		response := &CommandResponse{}
+		if err := json.Unmarshal(body, response); err != nil {
+			return nil, err
+		}
+		if !response.Response.Result && response.Response.Reason != "" {
+			return nil, errors.New(response.Response.Reason)
+		}
+	}
+	return body, nil
+}

examples/show_energy_site_status/main.go

@@ -0,0 +1,73 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"os"
+
+	"github.com/bogosj/tesla"
+)
+
+var tokenPath = flag.String("token", "", "path to token file")
+var reservePercentage = flag.Int64("backupPercentage", -1, "backup percentage to set")
+
+// example that demos fetching of site information and optionally setting the battery reserve percentage for the site
+func main() {
+	flag.Parse()
+
+	if *tokenPath == "" {
+		fmt.Println("--token must be specified")
+		os.Exit(1)
+	}
+
+	if err := run(context.Background(), *tokenPath, *reservePercentage); err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+}
+
+func run(ctx context.Context, tokenPath string, reservePercentage int64) error {
+	c, err := tesla.NewClient(ctx, tesla.WithTokenFile(tokenPath))
+	if err != nil {
+		return err
+	}
+
+	prods, err := c.Products()
+	if err != nil {
+		return err
+	}
+
+	for i, p := range prods {
+		if i > 0 {
+			fmt.Println("----")
+		}
+		fmt.Printf("ID: %s\n", p.ID)
+		fmt.Printf("ResourceType %s\n", p.ResourceType)
+		if p.EnergySiteId != 0 {
+			fmt.Printf("EnergySiteId: %d\n", p.EnergySiteId)
+
+			es, err := c.EnergySite(p.EnergySiteId)
+			if err != nil {
+				fmt.Printf("error fetching site info: %+v\n", err)
+				os.Exit(1)
+			}
+			fmt.Printf("EnergySite: %+v\n", *es)
+
+			esi, err := es.EnergySiteStatus()
+			if err != nil {
+				fmt.Printf("error fetching site status: %+v\n", err)
+				os.Exit(1)
+			}
+			fmt.Printf("EnergySiteInfo: %+v\n", *esi)
+
+			if reservePercentage != -1 {
+				if err := es.SetBatteryReserve(uint64(reservePercentage)); err != nil {
+					fmt.Printf("error setting battery reserve: %+v\n", err)
+					os.Exit(1)
+				}
+			}
+		}
+	}
+	return nil
+}

products.go

@@ -0,0 +1,36 @@
+package tesla
+
+type Product struct {
+	EnergySiteId      int64   `json:"energy_site_id,omitempty"`
+	ResourceType      string  `json:"resource_type"`
+	ID                string  `json:"id"`
+	AssetSiteId       string  `json:"asset_site_id,omitempty"`
+	GatewayId         string  `json:"gateway_id,omitempty"`
+	WarpSiteNumber    string  `json:"warp_site_number,omitempty"`
+	EnergyLeft        float64 `json:"energy_left,omitempty"`
+	TotalPackEnergy   uint64  `json:"total_pack_energy,omitempty"`
+	PercentageCharged float64 `json:"percentage_charged,omitempty"`
+	BatteryType       string  `json:"battery_type,omitempty"`
+	BackupCapable     bool    `json:"backup_capable,omitempty"`
+	BatteryPower      int64   `json:"battery_power,omitempty"`
+
+	c *Client
+}
+
+// ProductResponse contains the product details from the Tesla API.
+type ProductsResponse struct {
+	Response []*Product `json:"response"`
+	Count    int        `json:"count"`
+}
+
+// Products fetches the products associated to a Tesla account via the API.
+func (c *Client) Products() ([]*Product, error) {
+	productsResponse := &ProductsResponse{}
+	if err := c.getJSON(c.baseURL+"/products", productsResponse); err != nil {
+		return nil, err
+	}
+	for _, v := range productsResponse.Response {
+		v.c = c
+	}
+	return productsResponse.Response, nil
+}