The complete for the R2-D2 Droid Clock. 
�
�
Arduino IDE Setup Reference 
1. Board Selection 
● Board Manager: esp32 by Espressif Systems (Version 2.0.11 or later recommended). 
● Board Selection: ESP32C3 Dev Module 
○ (Note: The "SuperMini" is just a small Dev Module. Select this generic option.) 
2. Board Settings (Tools Menu) 
● USB CDC On Boot: Enabled (CRITICAL: If "Disabled", Serial Monitor won't work). 
● Flash Mode: DIO 
● Flash Frequency: 80MHz 
● Upload Speed: 921600 (Fast) or 115200 (Safe). 
● CPU Frequency: 160MHz (Standard). 
3. Serial Monitor Settings 
● Baud Rate: 115200 baud 
○ (Matches the line Serial.begin(115200); in the code). 
4. Required Libraries (Sketch > Include Library > Manage Libraries) 
Search for and install these specific libraries. The others (WiFi, Time, BLE) are built-in. 
Library Name 
TM1637 
Author 
Avishay Orpaz 
Version Purpose 
Latest 
Controls the 4-digit display. 
DFRobotDFPlayerMini 
●  
DFRobot 
Latest 
Controls the MP3 player. 
Note: BLEDevice, WiFi, and time.h do not need to be installed. They come pre-installed 
with the ESP32 board package. 
Here is the guide for customizing the R2-D2 code for your new home.  
These settings are located at the very top of the file, right after the library 
includes. 
1. WiFi Settings (Lines 11 & 12) 
You must keep the quotation marks "" around your network name and password. 
● Line 11: const char* ssid = "YOUR_WIFI_NAME"; 
● Line 12: const char* password = "YOUR_WIFI_PASSWORD"; 
Common Time Zone Cheat Sheet 
Time Zone 
gmtOffset_sec 
Eastern (EST) -18000 
Central (CST) -21600 
Mountain (MST) -25200 
Pacific (PST) -28800 
UK (GMT) 0 
Central Europe (CET) 3600 
2. Time Zone Settings (Lines 15 & 
16) 
The clock uses seconds to calculate the 
time zone, not hours. 
Line 15 (gmtOffset_sec): This is your 
offset from UTC (Greenwich Mean Time) in 
seconds. 
Formula: (Hours Offset) * 3600 
Example (EST): New York is UTC -5. So, -5 
\times 3600 = -18000 
Example (PST): California is UTC -8. So, -8 
\times 3600 = -28800 
Example (GMT): London is UTC 0. So, 0 
Line 16 (daylightOffset_sec): 
Set to 3600 if your area uses Daylight 
Savings Time. 
Set to 0 if you do not use DST (like 
Arizona).