diff --git a/ampel-firmware/web_server.cpp b/ampel-firmware/web_server.cpp
index 0e9c1346de27d26d614f747d62e84cd6381a39da..dd875774f0223d2cef10c44375e8d0ff323f7d86 100644
--- a/ampel-firmware/web_server.cpp
+++ b/ampel-firmware/web_server.cpp
@@ -125,11 +125,11 @@ namespace web_server {
     script_template = PSTR("<script>"
         "document.body.style.cursor = 'default';"
         "fetch('%s',{credentials:'include'})"
-        ".then(response=>response.text())"
-        ".then(csvText=>csvToTable(csvText))"
-        ".then(htmlTable=>addLogTableToPage(htmlTable))"
+        ".then(r=>r.text())"
+        ".then(c2t)"
+        ".then(addLog)"
         ".then(_=>Plotly.newPlot('graph',data,layout,{displaylogo:false}))"
-        ".catch(e=>console.error(e));"
+        ".catch(console.error);"
         "xs=[];"
         "data=[{x:xs,y:[],type:'scatter',name:'CO<sub>2</sub>',line:{color:'#2ca02c'}},"
         "{x:xs,y:[],type:'scatter',name:'Temperature',yaxis:'y2',line:{color:'#ff7f0e',dash:'dot'}},"
@@ -139,30 +139,30 @@ namespace web_server {
         "yaxis2:{overlaying:'y',side:'right',ticksuffix:'°C',position:0.9,anchor:'free',range:[0,30],dtick:3},"
         "yaxis3:{overlaying:'y',side:'right',ticksuffix:'%%',position:0.95,anchor:'free',range:[0,100],dtick:10}"
         "};"
-        "function csvToTable(csvText){"
-        "csvText=csvText.trim();"
-        "lines=csvText.split('\\n');"
-        "table=document.createElement('table');"
-        "table.className='pure-table-striped';"
-        "n=lines.length;"
-        "lines.forEach((line,i)=>{"
-        "fields=line.split(';');"
+        "function c2t(t){"
+        "t=t.trim();"
+        "ls=t.split('\\n');"
+        "tb=document.createElement('table');"
+        "tb.className='pure-table-striped';"
+        "n=ls.length;"
+        "ls.forEach((l,i)=>{"
+        "fs=l.split(';');"
         //Don't display points without time
-        "if (!fields[0].includes('1970-')){"
-        "xs.push(fields[0]);"
-        "data[0]['y'].push(fields[1]);"
-        "data[1]['y'].push(fields[2]);"
-        "data[2]['y'].push(fields[3]);"
+        "if (!fs[0].includes('1970-')){"
+        "xs.push(fs[0]);"
+        "data[0]['y'].push(fs[1]);"
+        "data[1]['y'].push(fs[2]);"
+        "data[2]['y'].push(fs[3]);"
         "};"
-        "if(i>4 && i<n-12){if(i==5){fields=['...','...','...','...']}else{return;}}"
-        "row=document.createElement('tr');"
-        "fields.forEach((field,index)=>{"
-        "cell=document.createElement(i<2?'th':'td');"
-        "cell.appendChild(document.createTextNode(field));"
-        "row.appendChild(cell);});"
-        "table.appendChild(row);});"
-        "return table;}"
-        "function addLogTableToPage(table){document.getElementById('log').appendChild(table);}"
+        "if(i>4 && i<n-12){if(i==5){fs=['...','...','...','...']}else{return;}}"
+        "r=document.createElement('tr');"
+        "fs.forEach((f,_)=>{"
+        "c=document.createElement(i<2?'th':'td');"
+        "c.appendChild(document.createTextNode(f));"
+        "r.appendChild(c);});"
+        "tb.appendChild(r);});"
+        "return tb;}"
+        "function addLog(t){document.getElementById('log').appendChild(t);}"
         "</script>"
         "</body>"
         "</html>");