Update readme.md

SOFTWARE/A64-TERES/teres1-debug/readme.md

@@ -1 +1,50 @@
 
+# teres1-debug
+
+teres1-debug and debug_switch.sh are DIY-TERES1 utilities for turning debug on or off 
+
+
+Usage: All commands must be executed as superuser
+
+- switch on/off debug for current session only until reboot
+```bash
+sudo teres1-debug on
+```
+or
+```bash
+sudo teres1-debug off
+```
+
+- switch on/off debug permanently
+```bash
+sudo debug_switch.sh on
+```
+or
+```bash
+sudo debug_switch.sh off
+```
+
+This file ("teres1-debug") is a part of the TERESI official image. However if you want to download just this file do following: 
+
+```bash
+git clone https://github.com/d3v1c3nv11/teres1-debug.git
+cd teres1-debug
+make
+sudo make install
+```
+destination path for installing is /usr/local/sbin, to change - edit Makefile
+
+
+Jack connection:
+```bash
+TX   RX
+ |   |    
+=== == ====|||||||||----------------------------
+         |
+        GND
+```
+
+# VERY IMPORTANT!!! 
+# Use 3.3V levels serial adaptor! 
+# DO NOT USE RS232 LEVEL ADAPTORS!
+