Lambda function to toggle a TP-Link HS100 smart switch

lambda_function.py

import requests 
import uuid 
import json
import random
import os
 
USERNAME = 'your_kasa_user@email.com' 
PASSWORD = os.environ['PASSWORD'] # not ideal but there aren't many options
 
def SwitchOn():
	# Get a token by authenticating with your Kasa username email and password. We'll generate a uuid4.
	payload = {"method": "login","params":{"appType": "Kasa_Android","cloudUserName": USERNAME,"cloudPassword": PASSWORD,"terminalUUID": str(uuid.uuid4())}}
	response = requests.post("https://wap.tplinkcloud.com/", json=payload)
	obj = json.loads(response.content)
	token = obj["result"]["token"]
	
	# Find the plug we want to turn ON or OFF
	payload = {"method": "getDeviceList"}
	response = requests.post("https://wap.tplinkcloud.com?token={0}".format(token), json=payload)
	
	# The response contains a list of devices, we're just going to use the first as I have only one device. You can filter by name using some of the other values like "alias"
	obj = json.loads(response.content)
	plug = obj["result"]["deviceList"][0]

	# The app_server_url contains a regional address like eu-wap.tplinkcloud.com - we will use that
	app_server_url = plug["appServerUrl"]
	
	# Get the plug's deviceId
	device_id = plug["deviceId"]
	print (device_id)
	
	# Create the payload for your POST request
	payload={
		"method":"passthrough", 
		"params": {
			"deviceId": device_id,
			"requestData": "{\"system\":{\"get_sysinfo\":null},\"emeter\":{\"get_realtime\":null}}" }}
	
	#Post the request to the app_server_url along with the token and grab the response
	response = requests.post("{0}?token={1}".format(app_server_url, token), json=payload)	
	jresponse = json.loads(response.text)
	print (jresponse)
	d= json.loads(jresponse['result']['responseData'])
	
	#Figure out if the switch is ON or OFF by checking the relay_state key in the response, and set the desired_state to the opposite (to toggle the switch)
	if d['system']['get_sysinfo']['relay_state']==0:
		print("Switch is OFF")
		desired_state=1
	else:
		print("Switch is ON")
		desired_state=0
	
	# Send a command to the plug to toggle its status
	plug_command = {
		"system": {
			"set_relay_state": {
				"state": desired_state
			}
		}
	}
	
	# Create the payload with the plug_command so we can POST it
	payload = {
		"method": "passthrough",
		"params": {
			"deviceId": device_id,
			"requestData": json.dumps(plug_command) # Request data needs to be escaped, it's a string!
		}
	}
	
	# Print the JSON payload for debugging in CloudWatch
	print (payload)
	response = requests.post("{0}?token={1}".format(app_server_url, token), json=payload)
	
	# Print the results in CloudWatch. error_code:0 means everything is OK.
	print (response.content)

# TODO implement
def lambda_handler(event, context):
	SwitchOn()