Blynk device to forward a local WiFi connected data point

[PeteKnight]

I’d probably use the HTTP(s) webbook to push that data from your temperature sensor device to the Blynk server using the auth token for your garage door opener.

The temperature sensor won’t run any Blynk code, it will simply connect to your WiFi the use a timer (SimpleTimer probably) to take a reading then post it to the Blynk server using the API.

Be aware that if you re-provision your garage door opener then the auth token for you device will change, and you’ll need to update your temperature sensor’s sketch so that it uses the updated auth token in your API call.

The basic code to make the API call is in this example…

Webhook widget

[EDIT 14th January 2022] Version 3.0.0 of the ESP8266 Core now requires that the http.begin command now includes the WiFi Client name as well as the server path. In the original sketch the start of the api_bridge function looked like this… void api_bridge(String token, int virtual_pin, float value_to_send) { HTTPClient http; String server_path = server_name + "update?token=" + token + "&pin=v" + String(virtual_pin) + "&value=" + float(value_to_send); // Your Domain name with URL path…

but this assumes that the device making the API call will be a separate device in Blynk. As that’s not what you want, you’ll need to remove the Blynk code, include the SimpleTimer library, manage the WiFi connection yourself, then add-in the code relating to your temperature sensor.

Pete.