diff --git a/README.md b/README.md
index 4c78d3c..4994e81 100644
--- a/README.md
+++ b/README.md
@@ -12,16 +12,18 @@
 ## Content
 * [Project description](#chapter-0)
 * [Usage](#chapter-1)
+* [Hardware](#chapter-2)
+* [Libraries](#chapter-3)
+
 
-\
 <a id="chapter-0"></a>
 ## Project description
 
 Arduino Controller for water pump
 
 
-\
-<a id="chapter-2"></a>
+
+<a id="chapter-1"></a>
 ## Usage
 
 1. Turn to change lower threshold
@@ -34,4 +36,25 @@ Arduino Controller for water pump
 [![Scheme](schemes/PumpController.png)]()
 
 
+<a id="chapter-2"></a>
+## Hardware
+
+| Name                   |  Model                   |
+|:---------------------  | -------------:           |
+| **Controller**         | Arduino Nano ATmega328   |
+| **Encoder**            | EC11                     |
+| **Display**            | TM1637                   |
+| **Relay**              | SSR-40DA                 |
+| **Pressure sensor**    | EBOWAN                   |
+
+
+<a id="chapter-3"></a>
+## Libraries
+
+| Name             |  Link                                      |
+|:---------------  | -------------                              |
+| **EncButton**    | https://github.com/GyverLibs/GyverTM1637   |
+| **GyverTM1637**  | https://github.com/GyverLibs/EncButton     |
+
+
 <h1 align="center"><a href="#top">▲</a></h1>
diff --git a/firmware/pump_encoder/pump_encoder.ino b/firmware/pump_encoder/pump_encoder.ino
index 57e2438..d10f3bc 100644
--- a/firmware/pump_encoder/pump_encoder.ino
+++ b/firmware/pump_encoder/pump_encoder.ino
@@ -44,7 +44,7 @@ int get_constrained_pressure_high(int pressure_high_local) {
 }
 
 void setup() {
-  Serial.begin(9600);
+  // Serial.begin(9600);
 
   pinMode(relay_port, OUTPUT);
 
@@ -141,7 +141,7 @@ void loop() {
       is_on_pump = false;
     } 
   }
-  Serial.print(pressure_low);
-  Serial.print(',');
-  Serial.println(pressure_high);
+//  Serial.print(pressure_low);
+//  Serial.print(',');
+//  Serial.println(pressure_high);
 }