diff --git a/apps/hasensors/boot.js b/apps/hasensors/boot.js
index a9122be5d..efafbc8a3 100644
--- a/apps/hasensors/boot.js
+++ b/apps/hasensors/boot.js
@@ -1,5 +1,5 @@
 (function () {
-    const sb = () => require('hasensors').sendBattery();
+    const sb = () => require("hasensors").sendBattery();
     Bangle.on("charging", sb);
     NRF.on("connect", () => setTimeout(sb, 2000));
     setInterval(sb, 10 * 60 * 1000);
diff --git a/apps/hasensors/custom.html b/apps/hasensors/custom.html
index 1fd1bcc3c..265f80f46 100644
--- a/apps/hasensors/custom.html
+++ b/apps/hasensors/custom.html
@@ -43,19 +43,19 @@
 </p>
 <script src="../../core/lib/customize.js"></script>
 <script>
-    const STORAGE_KEY = 'hasensors-config';
-    const fields = ['id', 'name', 'url', 'token'];
-    const form = document.getElementById('sensorform');
-    const LIBRARY_URL = './lib.js';
+    const STORAGE_KEY = "hasensors-config";
+    const fields = ["id", "name", "url", "token"];
+    const form = document.getElementById("sensorform");
+    const LIBRARY_URL = "./lib.js";
 
-    // fetch library code template, enable upload button once we've got it
+    // fetch library code template, enable upload button once we"ve got it
     let libTpl;
     fetch(LIBRARY_URL).then(response=>{
         if (! response.ok) return;
 console.log(response);
         response.text().then(code=>{
             libTpl = code;
-            document.getElementById('upload').disabled = false;
+            document.getElementById("upload").disabled = false;
         });
     });
 
@@ -91,7 +91,7 @@ console.log(response);
         localStorage.setItem(STORAGE_KEY, JSON.stringify(config));
         // replace {placeholders} in library code template
         const lib = libTpl.replace(/\{(\w+)\}/g, (_,f) => config[f]);
-        console.log('config:', config, JSON.stringify(config));
+        console.log("config:", config, JSON.stringify(config));
         sendCustomizedApp({
             id: "hasensors",
             storage: [
diff --git a/apps/hasensors/lib.js b/apps/hasensors/lib.js
index b8ee1bfb9..83072262c 100644
--- a/apps/hasensors/lib.js
+++ b/apps/hasensors/lib.js
@@ -1,13 +1,13 @@
 // split out into a separate file to keep bootcode short.
 // placeholders are replaced by custom.html before upload
 function post(sensor, data) {
-    const url = '{url}/api/states/sensor.{id}_' + sensor;
+    const url = "{url}/api/states/sensor.{id}_" + sensor;
     Bangle.http(url, {
-        method: 'POST',
+        method: "POST",
         body: JSON.stringify(data),
         headers: {
-            'Content-Type': 'application/json',
-            Authorization: 'Bearer {token}',
+            "Content-Type": "application/json",
+            Authorization: "Bearer {token}",
         }
     });
 }
@@ -19,8 +19,8 @@ exports.sendBattery = function () {
     let i = "mdi:battery";
     if (c) i += "-charging";
 
-    post('battery_state', {
-        state: c ? 'charging' : 'discharging',
+    post("battery_state", {
+        state: c ? "charging" : "discharging",
         attributes: {
             friendly_name: "{name} Battery State",
             icon: i + (c ? "" : "-minus"),
@@ -30,7 +30,7 @@ exports.sendBattery = function () {
     if (b<10) i += "-outline"; // there is no battery-0
     else if (b<100 || c) i += "-" + Math.floor(b/10)*10; // no battery-100 either
 
-    post('battery_level', {
+    post("battery_level", {
         state: b,
         attributes: {
             friendly_name: "{name} Battery Level",