Automate Your Home Using Go

Creating the Pico W REST Server

With the program’s core components completed, there needs to be a way to have the Prometheus server remotely poll the Pico W’s recorded temperature measurements so these metrics can be visualized on the Grafana instance that was set up previously. Doing so requires setting up a network connection using the onboard Wi-Fi adapter, associating it with your preferred Wi-Fi network’s SSID and related password, and finally creating a simple HTTP server that will deliver the rounded celsius and fahrenheit values as a JSON payload.

Start your program by adding the package definition and the import statement to main.go:

tempmonitor/picoserver/main.go

package main

import (
    "bufio"
    "encoding/json"
    "io" ...