func statusToSlack(api *slack.Client, my_name string, channel string, msg string) {
	params := slack.NewPostMessageParameters()
	params.Username = my_name
	params.IconEmoji = ":exclamation:"
	attachment := slack.Attachment{}
	attachment.Color = "#ffaa00"
	attachment.Title = "Alarm Status Update"
	attachment.Text = msg
	params.Attachments = []slack.Attachment{attachment}
	api.PostMessage(channel, "", params)
}
func logToSlack(api *slack.Client, my_name string, channel string, msg string, fields []slack.AttachmentField) {
	params := slack.NewPostMessageParameters()
	params.Username = my_name
	params.IconEmoji = ":page_with_curl:"
	attachment := slack.Attachment{}
	attachment.Color = "#ffaa00"
	attachment.Title = "Log Entry"
	attachment.Text = msg
	attachment.Fields = fields
	params.Attachments = []slack.Attachment{attachment}
	api.PostMessage(channel, "", params)
}
func motionToSlack(api *slack.Client, my_name string, channel string, image string, count int) {
	_, err := http.Get(image)
	chk(err)

	params := slack.NewPostMessageParameters()
	params.Username = my_name
	params.IconEmoji = ":rotating_light:"
	attachment := slack.Attachment{}
	attachment.Color = "#ff0000"
	attachment.Title = "Motion detected"
	attachment.Text = fmt.Sprintf("Motion events detected: %d", count)
	attachment.ImageURL = image
	params.Attachments = []slack.Attachment{attachment}
	api.PostMessage(channel, "", params)
}
func lightsToSlack(api *slack.Client, my_name string, channel string, image string, level int) {
	_, err := http.Get(image)
	chk(err)

	params := slack.NewPostMessageParameters()
	params.Username = my_name
	params.IconEmoji = ":bulb:"
	attachment := slack.Attachment{}
	attachment.Color = "#00ff00"
	attachment.Title = "Lights detected"
	attachment.Text = fmt.Sprintf("Light level detected: %d", level)
	attachment.ImageURL = image
	params.Attachments = []slack.Attachment{attachment}
	api.PostMessage(channel, "", params)
}