diff --git a/Caracal_Firmware.ino b/Caracal_Firmware.ino
index a0f9026..6edc4a2 100644
--- a/Caracal_Firmware.ino
+++ b/Caracal_Firmware.ino
@@ -59,8 +59,19 @@ enum UpdateStatus {
    CONSTANTS
 */
 
-#define PIN_STATUS   10
+#define HW_GROUP 2 // Changes with hardware changes that require software changes
+
+#if HW_GROUP == 1
+#define PIN_STATUS    10
+#define PIN_ACTIVITY   9 // Unusable
+#define PIN_CONFIG     0
+#endif
+
+#if HW_GROUP == 2
+#define PIN_STATUS    5
+#define PIN_ACTIVITY  4
 #define PIN_CONFIG    0
+#endif
 
 #define WIFI_TIMEOUT 10000
 #define UPDATE_START_DELAY 3000
@@ -69,8 +80,7 @@ enum UpdateStatus {
    GLOBAL VARIABLES
 */
 
-unsigned long HW_GROUP = 1;               // Changes with hardware changes that require software changes
-unsigned long FW_VERSION = 1808070003;    // Changes with each release; must always increase
+unsigned long FW_VERSION = 1812180001;    // Changes with each release; must always increase
 unsigned long SP_VERSION = 0;             // Loaded from SPIFFS; changed with each SPIFFS build; must always increase (uses timestamp as version)
 
 // FW & SPIFFS update settings
@@ -221,6 +231,25 @@ void blinkLEDStatusLoop(unsigned int duration) {
   delay(duration);
 }
 
+void setLEDActivity(bool state) {
+#if HW_GROUP == 1
+  digitalWrite(PIN_STATUS, state);
+#else
+  digitalWrite(PIN_ACTIVITY, state);
+#endif
+}
+
+void blinkLEDActivitySingle(unsigned int duration) {
+  setLEDActivity(1);
+  delay(duration);
+  setLEDActivity(0);
+}
+
+void blinkLEDActivityLoop(unsigned int duration) {
+  blinkLEDActivitySingle(duration);
+  delay(duration);
+}
+
 void handleConfigButton() {
   // Read the config button state to determine if it has been pressed or released
   btnState = !digitalRead(PIN_CONFIG);
@@ -598,6 +627,7 @@ t_httpUpdate_return doUpdateInsecure(bool spiffs) {
 void doUpdate(bool spiffs) {
   // Set both LEDs on during update
   setLEDStatus(1);
+  setLEDActivity(1);
   pinMode(2, OUTPUT);
   digitalWrite(2, LOW);
 
@@ -636,6 +666,9 @@ void setup() {
   WiFi.mode(WIFI_AP);
 
   pinMode(PIN_STATUS, OUTPUT);
+#if HW_GROUP != 1
+  pinMode(PIN_ACTIVITY, OUTPUT);
+#endif
   pinMode(PIN_CONFIG, INPUT_PULLUP);
   //attachInterrupt(digitalPinToInterrupt(PIN_CONFIG), ISR_config, CHANGE);
 
@@ -702,7 +735,8 @@ void setup() {
 #endif
 
   for (int i = 0; i < 3; i++) {
-    blinkLEDStatusLoop(125);
+    blinkLEDStatusLoop(60);
+    blinkLEDActivityLoop(60);
   }
 
   if (AP_ACTIVE) {
@@ -733,12 +767,14 @@ void loop() {
   if (newClient) client = newClient;
   if (client) {
     while (client.available()) {
-      setLEDStatus(1);
+      setLEDActivity(1);
       Serial.write(client.read());
-      setLEDStatus(0);
+      setLEDActivity(0);
     }
     while (Serial.available()) {
+      setLEDActivity(1);
       client.write(Serial.read());
+      setLEDActivity(0);
     }
   }
 
diff --git a/firmware.version b/firmware.version
deleted file mode 100644
index 60fa7c8..0000000
--- a/firmware.version
+++ /dev/null
@@ -1 +0,0 @@
-1808070003
\ No newline at end of file
diff --git a/firmware.bin b/firmware1.bin
similarity index 84%
rename from firmware.bin
rename to firmware1.bin
index 8c27a7c..ad81455 100644
Binary files a/firmware.bin and b/firmware1.bin differ
diff --git a/firmware1.version b/firmware1.version
new file mode 100644
index 0000000..8dd5607
--- /dev/null
+++ b/firmware1.version
@@ -0,0 +1 @@
+1812180001
\ No newline at end of file
diff --git a/firmware2.bin b/firmware2.bin
new file mode 100644
index 0000000..0337919
Binary files /dev/null and b/firmware2.bin differ
diff --git a/firmware2.version b/firmware2.version
new file mode 100644
index 0000000..8dd5607
--- /dev/null
+++ b/firmware2.version
@@ -0,0 +1 @@
+1812180001
\ No newline at end of file
diff --git a/prepare_firmware.py b/prepare_firmware.py
index b23b945..eb44042 100644
--- a/prepare_firmware.py
+++ b/prepare_firmware.py
@@ -10,16 +10,20 @@ import os
 import re
 import time
 
-with open("WiFi_Shield.ino", 'r') as f:
+with open("Caracal_Firmware.ino", 'r') as f:
     code = f.read()
+    
+match = re.search(r"#define HW_GROUP (\d+)", code)
+hw_version = match.group(1)
 
 match = re.search(r"FW_VERSION = (\d+);", code)
 fw_version = match.group(1)
 
-with open("firmware.version", 'w') as f:
-    f.write(fw_version)
+fname = "firmware{}.bin".format(hw_version)
+if os.path.exists("Caracal_Firmware.ino.generic.bin"):
+    if os.path.exists(fname):
+        os.remove(fname)
+    os.rename("Caracal_Firmware.ino.generic.bin", fname)
 
-if os.path.exists("WiFi_Shield.ino.generic.bin"):
-    if os.path.exists("firmware.bin"):
-        os.remove("firmware.bin")
-    os.rename("WiFi_Shield.ino.generic.bin", "firmware.bin")
\ No newline at end of file
+    with open("firmware{}.version".format(hw_version), 'w') as f:
+        f.write(fw_version)
\ No newline at end of file