Almost there

database.go

@@ -2,9 +2,8 @@ package main
 
 import (
 	"database/sql"
-	_ "github.com/Freeaqingme/golang-sql-driver-mysql"
 	"fmt"
-	"time"
+	_ "github.com/Freeaqingme/golang-sql-driver-mysql"
 )
 
 var ClimateDb *sql.DB
@@ -67,7 +66,7 @@ func getLastSnapshotRecordFromDb() (*SnapshotRecord, error) {
 	return &snapshotRecord, nil
 }
 
-func getSnapshotRecordsFromDb(dateSince time.Time) ([]*SnapshotRecord, error) {
+func getSnapshotRecordsFromDb(dateSince string) ([]*SnapshotRecord, error) {
 	snapshots := make([]*SnapshotRecord, 0)
 	query := "SELECT `%s`, `%s`, `%s`, `%s`, `%s` FROM `snapshots` WHERE `%s` > %s ORDER BY `id` DESC;"
 	rows, err := ClimateDb.Query(fmt.Sprintf(query, "id", "temp", "humidity", "co2", "time", "time", dateSince))

server.go

@@ -52,7 +52,7 @@ func sendData(w http.ResponseWriter, r *http.Request) {
 		}
 		dateSince = newDateSince
 	}
-	records, err := getSnapshotRecordsFromDb(dateSince)
+	records, err := getSnapshotRecordsFromDb(dateSince.String())
 	if internalErrorOnErr(fmt.Errorf("couldn't get snapshots from db: %w", err), w, r) { return }
 	json, err := createJsonFromSnapshotRecords(records)
 	if internalErrorOnErr(fmt.Errorf("couldn't create json from snapshots: %w", err), w, r) { return }

webapp/src/ClimateChart.ts

@@ -46,7 +46,7 @@ class ClimateChart {
 
     private async getInitialDataBlob(): Promise<SnapshotRecords> {
         try {
-            const data = await fetch(this.rootUrl + "/data?since=" + (new Date().getTime() - this.minutesDisplayed * 60 * 1000));
+            const data = await fetch(this.rootUrl + "/data?since=" + new Date((new Date().getTime() - this.minutesDisplayed * 60 * 1000)).toISOString());
             return await data.json();
         }
         catch (e) {