rfhs · ZeroChaos- · Jul 7, 2026 · Jul 4, 2026 · Jul 6, 2026 · Jul 7, 2026
diff --git a/README.md b/README.md
@@ -3,13 +3,13 @@ RF CTF Fox code
 [![Build Test All](https://github.com/rfhs/kitsune/actions/workflows/build-test-all.yaml/badge.svg)](https://github.com/rfhs/kitsune/actions/workflows/build-test-all.yaml)
 
 
-|Hardware |Bluetooth iBeacon |Bluetooth Classic Discoverable |Wifi AP |Client |
+|Hardware |Bluetooth iBeacon |Bluetooth Classic Discoverable |WiFi AP |WiFi Client |
 |------------------- | :---------: | :------: | :-----: | :-----: |
 |M5Stack Atom-lite |✅|✅|✅|✅|
 |M5Stack AtomS3-lite |✅|❌|✅|✅|
 |M5Stack StampS3 |✅|❌|✅|✅|
-|Arduino Nano ESP32 |✅|❌|✅|❌|
-|Seeed XIAO ESP32C5 |❌|❌|✅|❌|
+|Arduino Nano ESP32 |✅|❌|✅|✅|
+|Seeed XIAO ESP32C5 |❌|❌|✅|✅|
 
 We will accept PRs to extend support to other platformio supported hardware.
 

diff --git a/fastcat b/fastcat
@@ -0,0 +1,12 @@
+#!/bin/sh
+until ls /dev/ttyACM0 > /dev/null 2>&1 || ls /dev/ttyUSB0 > /dev/null 2>&1; do
+  sleep 0.1
+done
+if ls /dev/ttyACM0 > /dev/null 2>&1; then
+  stty -F /dev/ACMUSB0 115200 raw -echo
+  cat /dev/ttyACM0
+fi
+if ls /dev/ttyUSB0 > /dev/null 2>&1; then
+  stty -F /dev/USB0 115200 raw -echo
+  cat /dev/ttyUSB0
+fi
diff --git a/include/rfhswifi.h b/include/rfhswifi.h
@@ -9,4 +9,7 @@ void disableWiFi() {
   WiFi.disconnect(true);
 #endif
   WiFi.mode(WIFI_OFF);
+  esp_wifi_stop();
+  esp_wifi_deinit();
+  esp_wifi_set_mode(WIFI_MODE_NULL);
 }
diff --git a/make_conference_full.sh b/make_conference_full.sh
@@ -17,6 +17,10 @@ for challenge in bluetooth/iBeacon bluetooth/classic_discoverable wifi/wifi_ap_c
   fi
   popd > /dev/null 2>&1
 done
+if [ -f "$(date +"%Y")${1}.txt" ]; then
+  printf '%s%s.txt already exists, please remove it or pick a different name\n' "$(date +"%Y")" "${1}"
+  exit 1
+fi
 
 # Safety checks complete, define functions and do the thing
 threewords() {
@@ -25,8 +29,9 @@ threewords() {
     exit 1
   fi
   dictionary='/usr/share/dict/cracklib-words'
-  shuf -n3 "${dictionary}" | paste -sd ' '
+  shuf -n3 "${dictionary}" | tr '[:lower:]' '[:upper:]' | paste -sd ' '
 }
+export -f threewords
 
 for challenge in bluetooth/iBeacon bluetooth/classic_discoverable wifi/wifi_ap_client; do
   pushd "${challenge}" > /dev/null 2>&1
@@ -42,7 +47,11 @@ for challenge in bluetooth/iBeacon bluetooth/classic_discoverable wifi/wifi_ap_c
   popd > /dev/null 2>&1
 done
 printf "Seeding keys for %s%s... " "$(date +"%Y")" "${1}"
+#sed -i \
+#  -e "/RFHS_CHALLENGE_NAME/i -\n----------------------------------------------------------------\n$(date +"%Y")${1}\n$(threewords)\n" \
+#  "$(date +"%Y")${1}.txt"
 sed -i \
-  -e "/RFHS_CHALLENGE_NAME/i -\n----------------------------------------------------------------\n$(date +"%Y")${1}\n$(threewords)\n" \
+  -e "/RFHS_CHALLENGE_NAME/{h; s/.*/printf -- '-\\n----------------------------------------------------------------\\nConference: %s%s\\nFlag: %s\\n\\n' \"\$(date +%Y)\" \"${1}\" \"\$(threewords)\"/e; G;}" \
   "$(date +"%Y")${1}.txt"
+sed -i '1iSet font to "Roboto Mono' "$(date +"%Y")${1}.txt"
 printf "complete\n"
diff --git a/wifi/wifi_ap_client/README.md b/wifi/wifi_ap_client/README.md
@@ -31,8 +31,8 @@ seeed-xiao-esp32c5-hard-ap      Platform  upload         Upload
 |M5Stack Atom-lite |✅|✅|✅|
 |M5Stack AtomS3-lite |✅|✅|❌|
 |M5Stack StampS3 |✅|✅|❌|
-|Ardunio Nano ESP32 |✅|❌|❌|
-|Seeed Xiao ESP32C5 |✅|❌|❌|
+|Ardunio Nano ESP32 |✅|✅|❌|
+|Seeed Xiao ESP32C5 |✅|✅|❌|
 
 To use:
 - [Install PlatformIO](https://platformio.org/install/cli)

diff --git a/wifi/wifi_ap_client/platformio.ini b/wifi/wifi_ap_client/platformio.ini
@@ -66,15 +66,15 @@ build_flags = ${difficulty.hard} ${mode.client}
 [env:arduino-nano-esp32-easy-ap]
 extends = arduino_nano_esp32
 build_flags = ${difficulty.easy} ${mode.ap} ${arduino_nano_esp32.board_flags}
-;[env:arduino-nano-esp32-easy-client]
-;extends = arduino_nano_esp32
-;build_flags = ${difficulty.easy} ${mode.client} ${arduino_nano_esp32.board_flags}
+[env:arduino-nano-esp32-easy-client]
+extends = arduino_nano_esp32
+build_flags = ${difficulty.easy} ${mode.client} ${arduino_nano_esp32.board_flags}
 [env:arduino-nano-esp32-hard-ap]
 extends = arduino_nano_esp32
 build_flags = ${difficulty.hard} ${mode.ap} ${arduino_nano_esp32.board_flags}
-;[env:arduino-nano-esp32-hard-client]
-;extends = arduino_nano_esp32
-;build_flags = ${difficulty.hard} ${mode.client} ${arduino_nano_esp32.board_flags} 
+[env:arduino-nano-esp32-hard-client]
+extends = arduino_nano_esp32
+build_flags = ${difficulty.hard} ${mode.client} ${arduino_nano_esp32.board_flags} 
 
 ; Client mode gets the wrong mac address, not sure why
 [env:seeed-xiao-esp32c5-easy-ap]
@@ -83,18 +83,18 @@ build_flags = ${difficulty.easy} ${mode.ap} ${seeed-xiao-esp32c5.board_flags}
 [env:seeed-xiao-esp32c5-fiveeasy-ap]
 extends = seeed-xiao-esp32c5
 build_flags = ${difficulty.easy} ${difficulty.fiveeasy} ${mode.ap} ${seeed-xiao-esp32c5.board_flags}
-;[env:seeed-xiao-esp32c5-easy-client]
-;extends = seeed-xiao-esp32c5
-;build_flags = ${difficulty.easy} ${mode.client} ${seeed-xiao-esp32c5.board_flags}
+[env:seeed-xiao-esp32c5-easy-client]
+extends = seeed-xiao-esp32c5
+build_flags = ${difficulty.easy} ${mode.client} ${seeed-xiao-esp32c5.board_flags}
 [env:seeed-xiao-esp32c5-hard-ap]
 extends = seeed-xiao-esp32c5
 build_flags = ${difficulty.hard} ${mode.ap} ${seeed-xiao-esp32c5.board_flags}
 [env:seeed-xiao-esp32c5-fivehard-ap]
 extends = seeed-xiao-esp32c5
 build_flags = ${difficulty.hard} ${difficulty.fivehard} ${mode.ap} ${seeed-xiao-esp32c5.board_flags}
-;[env:seeed-xiao-esp32c5-hard-client]
-;extends = seeed-xiao-esp32c5
-;build_flags = ${difficulty.hard} ${mode.client} ${seeed-xiao-esp32c5.board_flags}
+[env:seeed-xiao-esp32c5-hard-client]
+extends = seeed-xiao-esp32c5
+build_flags = ${difficulty.hard} ${mode.client} ${seeed-xiao-esp32c5.board_flags}
 
 ; known issues:
 ; serial isn't working

diff --git a/wifi/wifi_ap_client/src/conferences/9999demo.h b/wifi/wifi_ap_client/src/conferences/9999demo.h
@@ -55,6 +55,48 @@
 #define TIME_TO_SLEEP 45
 #define TXPOWER WIFI_POWER_7dBm
 #endif
+
+#if defined(FIVEEASY)
+#define RFHS_CHALLENGE_NAME "WiFi 5GHz AP Easy Fox"
+// Network config
+#define FSSID "Demo Rex WiFi 5GHz AP Easy Fox"
+#define PSK "0123456789"
+// set mac address
+#define MAC_ADDR {0xF2, 0xC6, 0xB7, 0xE2, 0xE9, 0x85}
+// 1-13 permitted 0 means random
+#define CHANNEL 36
+// 0 broadcast 1 hidden
+#define SSID_HIDDEN  0
+// 1-4 permitted
+#define MAX_CLIENTS 1
+#define TIME_TO_WAKE 15
+#define TIME_TO_SLEEP 5
+// checks run during startup so we want to stay
+// running no longer than a few minutes to force
+// checks to run and led to update
+#define TXPOWER WIFI_POWER_17dBm
+#endif
+
+#if defined(FIVEHARD)
+#define RFHS_CHALLENGE_NAME "WiFi 5GHz AP Hard Fox"
+// Network config
+#define FSSID "Demo Liberty WiFi 5GHzAPHardFox"
+#define PSK "0123456789"
+// set mac address
+#define MAC_ADDR {0xF2, 0x81, 0x41, 0xD1, 0x30, 0xD1}
+// 1-13 permitted 0 means random
+#define CHANNEL 0
+// 0 broadcast 1 hidden
+#define SSID_HIDDEN 0
+// 1-4 permitted
+#define MAX_CLIENTS 1
+// checks run during startup so we want to stay
+// running no longer than a few minutes to force
+// checks to run and led to update
+#define TIME_TO_WAKE 30
+#define TIME_TO_SLEEP 45
+#define TXPOWER WIFI_POWER_7dBm
+#endif
 #endif
 
 #if defined(CLIENT)

diff --git a/wifi/wifi_ap_client/src/main.cpp b/wifi/wifi_ap_client/src/main.cpp
@@ -15,18 +15,22 @@ void setup() {
 
   // Initialize Wi-Fi with default configuration to set MAC address
   wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
-  WiFi.mode(WIFI_MODE_NULL);
+  #if defined(AP)
+  WiFi.mode(WIFI_AP);
+  #elif defined(CLIENT)
+  WiFi.mode(WIFI_STA);
+  #endif
   esp_wifi_init(&cfg);
   // esp_wifi_start(); // esp_wifi_set_mac() only requires Wi-Fi to be *initialized*
 
   #if defined(AP)
   // Create Wi-Fi network with SSID and password
-  Serial.println("Setting AP (Access Point)…");
+  Serial.println("Setting up AP (Access Point)…");
   // Interface to set MAC address
   wifi_interface_t interface = WIFI_IF_AP;
   #elif defined(CLIENT)
   // Connect to Wi-Fi network with SSID and password
-  Serial.println("Setting WiFi Fox Client…");
+  Serial.println("Setting up WiFi Client…");
   // Interface to set MAC address
   wifi_interface_t interface = WIFI_IF_STA;
   #endif
@@ -66,7 +70,6 @@ void setup() {
   snprintf(mac_str, sizeof(mac_str), "%02X:%02X:%02X:%02X:%02X:%02X",
       mac_addr[0], mac_addr[1], mac_addr[2],
       mac_addr[3], mac_addr[4], mac_addr[5]);
-  Serial.println("Requested MAC address: " + String(mac_str));
   #if defined(AP)
   #if CHANNEL > 0
   int set_channel = CHANNEL;
@@ -81,8 +84,6 @@ void setup() {
   //  128, 132, 136, 140, 144, 149, 153, 157, 161, 165
   //};
   */
-
-  // All other channels were refused due to reg domain
   static constexpr uint8_t CHANNEL_LIST_5G[] = {
     36, 40, 44, 48, 149, 153, 157, 161, 165
   };
@@ -91,29 +92,54 @@ void setup() {
   uint8_t set_channel = CHANNEL_LIST_5G[random_index];
   #else
   // Intentionally limited to worldwide allowed channels
-  int set_channel = esp_random() % 11;
+  uint8_t set_channel = esp_random() % 11;
   set_channel++;
   #endif
   #endif
-  Serial.printf("Setting channel to: %d\r\n", set_channel);
-  Serial.flush();
   WiFi.mode(WIFI_AP);
   WiFi.softAP(FSSID, PSK, set_channel, SSID_HIDDEN, MAX_CLIENTS);
+  delay(100); // Let AP start before we run our checks
   Serial.printf("Set power status: %s\r\n", String(WiFi.setTxPower(TXPOWER)));
   Serial.println("Started AP with MAC Address: " + WiFi.softAPmacAddress());
   if (WiFi.softAPmacAddress() != mac_str){
+    Serial.println("Requested MAC address      : " + String(mac_str));
     Serial.println("Read MAC Address != Requested Mac Address");
+    Serial.flush();
+    disableWiFi();
     rfhsledfatal();
   }
+  uint8_t currentChannel = WiFi.channel();
+  Serial.printf("Operating channel: %d\r\n", currentChannel);
+  if (currentChannel != set_channel){
+    Serial.printf("Requested channel: %d\r\n", set_channel);
+    Serial.println("Operating channel != Requested Channel");
+    Serial.flush();
+    disableWiFi();
+    rfhsledfatal();
+  }
+  String currentSSID = WiFi.softAPSSID();
+  Serial.println("Operating SSID: " + currentSSID);
+  if (String(FSSID) != currentSSID){
+    Serial.println("Requested SSID: " FSSID);
+    Serial.println("Operating SSID != Requested SSID");
+    Serial.flush();
+    disableWiFi();
+    rfhsledfatal();
+  }
+  Serial.flush();
   ledcolor(0x00ff00); // GREEN
   #elif defined(CLIENT)
   WiFi.mode(WIFI_STA);
   WiFi.begin(FSSID, PSK);
+  delay(100); // Let Client start before we run our checks
   Serial.println("Started Client with MAC Address: " + WiFi.macAddress());
   if (WiFi.macAddress() != mac_str){
     Serial.println("Read MAC Address != Requested Mac Address");
+    Serial.flush();
+    disableWiFi();
     rfhsledfatal();
   }
+  Serial.flush();
   ledcolor(0xff8c00);  // ORANGE
   #endif
 
@@ -126,9 +152,9 @@ void setup() {
   ledcolor(0x880000);  // HALF RED
   disableWiFi();
   ledcolor(0xff0000);  // RED
-  delay(75); // adjust the esp_deep_sleep if you change this
-  // subtract sleep time on line 91
-  int sleepy_tyme = uS_TO_S * TIME_TO_SLEEP - 75 ;
+  delay(75); // Give the led time to set before sleeping
+  // subtract sleep time on line 101, 134, 155
+  int sleepy_tyme = uS_TO_S * TIME_TO_SLEEP - 75 - 100 ;
   if (sleepy_tyme < 0 ) {
     sleepy_tyme = 0;
   }