Update termux_notes.md

client/src/cmdhfmfdes.c

@@ -3615,7 +3615,11 @@ static int CmdHF14ADesInfo(const char *Cmd) {
     if (res == PM3_SUCCESS) {
         static const char STANDALONE_DESFIRE[] = { 0x75, 0x77, 0x81, 0x02};
         static const char JCOP_DESFIRE[] = { 0x75, 0xf7, 0xb1, 0x02 };
+        static const char JCOP3_DESFIRE[] = { 0x78, 0x77, 0x71, 0x02 };
 
+        if (card.sak == 0x20) {
+
+            if (card.ats_len >= 5) {
                 if (str_startswith((const char *)card.ats + 1, STANDALONE_DESFIRE)) {
                     PrintAndLogEx(INFO, "Standalone DESFire");
                 }
@@ -3623,6 +3627,13 @@ static int CmdHF14ADesInfo(const char *Cmd) {
                     PrintAndLogEx(INFO, "JCOP DESFire");
                 }
             }
+            if (card.ats_len == 4) {
+                if (str_startswith((const char *)card.ats + 1, JCOP3_DESFIRE)) {
+                    PrintAndLogEx(INFO, "JCOP3 DESFire");
+                }
+            }
+        }
+    }
 
     /*
         Card Master key (CMK)        0x00 AID = 00 00 00 (card level)

doc/termux_notes.md

@@ -34,6 +34,10 @@
 
 - Android phone
 - [Termux](https://play.google.com/store/apps/details?id=com.termux)
+- Proxmark3 RDV4 (https://www.proxmark.com/proxmark-3-hardware/proxmark-3-rdv4)
+- Blueshark Standalone Module (Bluetooth ONLY) (https://www.proxmark.com/proxmark-news/proxmark3-blueshark-bluetooth-released)
+- Proxmark with BTADDON compiled Firmware (Bluetooth ONLY) (https://github.com/RfidResearchGroup/proxmark3/blob/master/doc/md/Use_of_Proxmark/4_Advanced-compilation-parameters.md#platform_extras)
+
 
 ## Notes
 ^[Top](#top)
@@ -196,4 +200,30 @@ Alternatively, if you have made the client in the git repo:
 ```
 ./client/proxmark3 tcp:localhost:<chosenPort>
 ```
+### Troubleshooting
+^[Top](#top)
+
+#### BTADDON Missing in Firmware of PM3
+
+1. Phone and pm3 are connected, blue led is on and *not* blinking
+2. BTUART Tool TCP Server at Port 4321 
+3. Using proxmark3 in termux shows the following error message:
+```
+$ proxmark3 tcp:localhost:4321
+
+[=] Session log /data/data/com.termux/files/home/.suroot /.proxmark3/log_20210519.txt
+
+[=] Loading Preferences...
+
+[+] loaded from JSON file /data/data/com.termux/files/ho me/.suroot/.proxmark3/preferences.json
+
+Using UART port tcp:localhost:4321
+
+[!!] ERROR: cannot communicate with the Proxmark
+```
+Solution:  
+
+Make sure you have installed a firmware with BTADDON compiled. 
+See: https://github.com/RfidResearchGroup/proxmark3/blob/master/doc/md/Use_of_Proxmark/4_Advanced-compilation-parameters.md#platform_extras  
+
 ENJOY !