diff --git a/src/api/config.js b/src/api/config.js
index 636367a..90b7d7e 100644
--- a/src/api/config.js
+++ b/src/api/config.js
@@ -11,10 +11,11 @@ export default class Config {
     return fetch(`${this.api}config/all`, { method: 'GET' }).then(parseFetch);
   }
   set(data) {
-    return fetch(`${this.api}config`, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify(data)
-    }).then(parseFetch);
+    const body = new URLSearchParams();
+    for (const key in data) {
+      body.append(key, data[key]);
+    }
+
+    return fetch(`${this.api}config`, { method: 'POST', body }).then(parseFetch);
   }
 }
diff --git a/src/api/network.js b/src/api/network.js
index ec5e2ff..15742de 100644
--- a/src/api/network.js
+++ b/src/api/network.js
@@ -14,34 +14,30 @@ export default class Network {
     return fecth(`${this.api}network/status`, { method: 'GET' }).then(parseFetch);
   }
   assosiate(ssid, phrase, recreate = false) {
-    return fetch(`${this.api}network/associate`, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ ssid, phrase, recreate })
-    }).then(parseFetch);
+    const body = new URLSearchParams();
+    body.append('ssid', ssid);
+    body.append('phrase', phrase);
+    body.append('recreate', recreate);
+
+    return fetch(`${this.api}network/associate`, { method: 'POST', body }).then(parseFetch);
   }
   disassociate() {
     //not tested
-    return fetch(`${this.api}network/disassociate`, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({})
-    }).then(parseFetch);
+    const body = new URLSearchParams();
+
+    return fetch(`${this.api}network/disassociate`, { method: 'POST', body }).then(parseFetch);
   }
   openAccesPoint() {
     //not tested
-    return fetch(`${this.api}network/openap`, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({})
-    }).then(parseFetch);
+    const body = new URLSearchParams();
+
+    return fetch(`${this.api}network/openap`, { method: 'POST', body }).then(parseFetch);
   }
   remove(ssid) {
-    return fetch(`${this.api}network/remove`, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ ssid })
-    }).then(parseFetch);
+    const body = new URLSearchParams();
+    body.append('ssid', ssid);
+
+    return fetch(`${this.api}network/remove`, { method: 'POST', body }).then(parseFetch);
   }
   signin() {
     return fecth(`${this.api}network/signin`, { method: 'GET' }).then(parseFetch);
diff --git a/src/api/printer.js b/src/api/printer.js
index 63fbb5a..3149f2d 100644
--- a/src/api/printer.js
+++ b/src/api/printer.js
@@ -17,25 +17,32 @@ export default class Printer {
     return fetch(`${this.api}printer/listall`, { method: 'GET' }).then(parseFetch);
   }
   heatup() {
-    return fetch(`${this.api}printer/heatup`, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({})
-    }).then(parseFetch);
+    const body = new URLSearchParams();
+
+    return fetch(`${this.api}printer/heatup`, { method: 'POST', body }).then(parseFetch);
+  }
+  fetch(id, startCode = 'g28', endCode = 'g28') {
+    const body = new URLSearchParams();
+    body.append('id', id);
+    body.append('start_code', startCode);
+    body.append('end_code', endCode);
+
+    return fetch(`${this.api}printer/fetch`, { method: 'POST', body }).then(parseFetch);
   }
   print(gcode = '', first = false, start = false, last) {
-    return fetch(`${this.api}printer/print`, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ gcode, first, start, last })
-    }).then(parseFetch);
+    const body = new URLSearchParams();
+    body.append('gcode', gcode);
+    body.append('first', first);
+    body.append('start', start);
+    body.append('last', last);
+
+    return fetch(`${this.api}printer/print`, { method: 'POST', body }).then(parseFetch);
   }
   stop(gcode = '') {
-    return fetch(`${this.api}printer/stop`, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ gcode, first, start, last })
-    }).then(parseFetch);
+    const body = new URLSearchParams();
+    body.append('gcode', gcode);
+
+    return fetch(`${this.api}printer/stop`, { method: 'POST', body }).then(parseFetch);
   }
   async _sendBatch(gcode, start, index) {
     try {
diff --git a/src/api/sketch.js b/src/api/sketch.js
index 8b6c94b..4213b52 100644
--- a/src/api/sketch.js
+++ b/src/api/sketch.js
@@ -8,20 +8,17 @@ export default class Sketch {
     return fetch(`${this.api}sketch/?id=${id}`, { method: 'GET' }).then(parseFetch);
   }
   set(data = '') {
-    return fetch(`${this.api}sketch`, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ data })
-    }).then(parseFetch);
+    const body = new URLSearchParams();
+    body.append('data', data);
+
+    return fetch(`${this.api}sketch`, { method: 'POST', body }).then(parseFetch);
   }
   status() {
     return fetch(`${this.api}sketch/status`, { method: 'GET' }).then(parseFetch);
   }
   clear() {
-    return fetch(`${this.api}sketch/clear`, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({})
-    }).then(parseFetch);
+    const body = new URLSearchParams();
+
+    return fetch(`${this.api}sketch/clear`, { method: 'POST', body }).then(parseFetch);
   }
 }
diff --git a/src/api/update.js b/src/api/update.js
index 513dc5e..0573a31 100644
--- a/src/api/update.js
+++ b/src/api/update.js
@@ -9,26 +9,20 @@ export default class Update {
   }
   download() {
     //not tested
-    return fetch(`${this.api}update/download`, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({})
-    }).then(parseFetch);
+    const body = new URLSearchParams();
+
+    return fetch(`${this.api}update/download`, { method: 'POST', body }).then(parseFetch);
   }
   install() {
     //not tested
-    return fetch(`${this.api}update/install`, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({})
-    }).then(parseFetch);
+    const body = new URLSearchParams();
+
+    return fetch(`${this.api}update/install`, { method: 'POST', body }).then(parseFetch);
   }
   clear() {
     //not tested
-    return fetch(`${this.api}update/clear`, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({})
-    }).then(parseFetch);
+    const body = new URLSearchParams();
+
+    return fetch(`${this.api}update/clear`, { method: 'POST', body }).then(parseFetch);
   }
 }