This is a very simple AWS Lambda function that uses the Nest API to collect temperature data from Nest thermostats and store it in DynamoDB.
[
{
"device_key": "01ABCDEF01ABCDEF",
"target_temperature": 24.7094,
"current_temperature": 24.2,
"hvac_ac_state": false,
"hvac_heater_state": false
},
{
"device_key": "02ABCDEF02ABCDEF",
"target_temperature": 24.556,
"current_temperature": 24.86,
"hvac_ac_state": false,
"hvac_heater_state": false
}
]{
"current_temperature": {
"N": "24.2"
},
"device_key": {
"S": "01ABCDEF01ABCDEF"
},
"hvac_ac_state": {
"BOOL": false
},
"hvac_heater_state": {
"BOOL": false
},
"target_temperature": {
"N": "24.7094"
},
"timestamp": {
"N": "1467383772074"
}
}-
If you don't already have one, create an AWS account
-
Create an S3 Bucket (used to store Nest authentication cache)
-
Create a DynamoDB Table (used to store temperature data). Use "device_key" (string) as the partition key, and "timestamp" (integer) as the range key.
-
Create a new IAM Role (with Lambda trust) with the following policy document (used to give Lambda permission to log, s3, and dynamo)
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"dynamodb:PutItem"
],
"Resource": [
"arn:aws:dynamodb:us-east-1:<account_number>:table/<table_name>"
]
},
{
"Effect": "Allow",
"Action": [
"s3:DeleteObject",
"s3:GetObject",
"s3:PutObject"
],
"Resource": [
"arn:aws:s3:::<bucket_Name>/auth_cache"
]
},
{
"Effect": "Allow",
"Action": [
"logs:*"
],
"Resource": [
"*"
]
}
]
}- Create zip file of lambda function (including "node_modules" folder, and javascript files)
cd nesthistory
zip -r nesthistory.zip *- Create a new lambda function, upload the zip file you created
- NodeJS 4.3 runtime
- Set IAM role you created
- 128MB
- 5 second timeout
- Schedule the Lambda function execute every 5 to 15 minutes (you can choose whatever you want)
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