Update README.md

Author: Sanjay0302

Diff for: README.md

@@ -14,3 +14,16 @@
 - MD MAX72XX by majicDesigns Version 3.4.1
 - MD_Parola by majicDesigns Version 3.6.2
 - TinyGSM by Volodymyr Shymanskyy Version 0.11.3
+
+### Led Connections
+// vcc - Esp32 3v3 - Grey
+//gnd  - Esp32 gnd - Red
+#define DATA_PIN 19  // orange 
+#define CS_PIN 5     // yellow
+#define CLK_PIN 18   // green
+
+### SIM800L connection
+Vcc - Battery 3.7v
+Gnd - Battery gnd - Esp32 Gnd
+Tx - Rx2 of Esp32
+Rx - Tx2 of Esp32