diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
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+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
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+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/README.md b/README.md
index da42ff8..4661903 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ Check out the [Dispensy documentation](https://drinkrobotics.github.io/dispensy/
 
 ## License
 
-This project is licensed under the [CERN Open Hardware Licence Version 2 - Strongly Reciprocal (CERN-OHL-S-2.0+)](https://ohwr.org/cern_ohl_s_v2.txt) or any later version.
+This hardware of this project is licensed under the [CERN Open Hardware Licence Version 2 - Strongly Reciprocal (CERN-OHL-S-2.0+)](https://ohwr.org/cern_ohl_s_v2.txt) or any later version.
 
 The docs are built using [mdbook](https://github.com/rust-lang/mdBook), licensed as `MPL-2.0`.
 The PCB SVG files in the documentation are displayed using [svg-pan-zoom](https://github.com/bumbu/svg-pan-zoom), licensed as `BSD-2-Clause`.
@@ -41,7 +41,19 @@ Please also take a look at the `README.md` files in the subfolders of this proje
     | source.                                                                      |
      ------------------------------------------------------------------------------
 
-This is the SPDX header for this project:
+The firmware of this project is licensed as GPLv3.
+I initially adapted it from my own [Trackball](https://git.xythobuz.de/thomas/Trackball) and [Volcano Remote](https://git.xythobuz.de/thomas/sb-py) projects.
+It uses the [Pi Pico SDK](https://github.com/raspberrypi/pico-sdk), licensed as BSD 3-clause, and therefore also [TinyUSB](https://github.com/hathach/tinyusb), licensed under the MIT license.
+Some code is adapted from the TinyUSB examples.
 
-    SPDX-FileCopyrightText: 2023 - 2024 Thomas Buck <thomas@xythobuz.de>
-    SPDX-License-Identifier: CERN-OHL-S-2.0+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    See <http://www.gnu.org/licenses/>.
diff --git a/firmware/.clangd b/firmware/.clangd
new file mode 100644
index 0000000..d1fb880
--- /dev/null
+++ b/firmware/.clangd
@@ -0,0 +1,2 @@
+CompileFlags:
+  Add: [-I/usr/arm-none-eabi/include]
diff --git a/firmware/README.md b/firmware/README.md
index ce456fa..c6b7aef 100644
--- a/firmware/README.md
+++ b/firmware/README.md
@@ -99,22 +99,3 @@ And also start a GDB debugging session.
 These commands have also been put in the `flash_swd.sh` and `debug_swd.sh` scripts, respectively.
 They require the `build_debug` folder where you checked out and built OpenOCD.
 Here are some [general GDB tips](https://beej.us/guide/bggdb/).
-
-## License
-
-The firmware itself is licensed as GPLv3.
-I initially adapted it from my own [Trackball](https://git.xythobuz.de/thomas/Trackball) and [Volcano Remote](https://git.xythobuz.de/thomas/sb-py) projects.
-It uses the [Pi Pico SDK](https://github.com/raspberrypi/pico-sdk), licensed as BSD 3-clause, and therefore also [TinyUSB](https://github.com/hathach/tinyusb), licensed under the MIT license.
-Some code is adapted from the TinyUSB examples.
-
-    This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    See <http://www.gnu.org/licenses/>.
diff --git a/firmware/include/buttons.h b/firmware/include/buttons.h
index f99f8ce..1b8b489 100644
--- a/firmware/include/buttons.h
+++ b/firmware/include/buttons.h
@@ -1,7 +1,7 @@
 /*
  * buttons.h
  *
- * Copyright (c) 2022 - 2023 Thomas Buck (thomas@xythobuz.de)
+ * Copyright (c) 2022 - 2024 Thomas Buck (thomas@xythobuz.de)
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/firmware/include/config.h b/firmware/include/config.h
index a4f1921..d7e4b67 100644
--- a/firmware/include/config.h
+++ b/firmware/include/config.h
@@ -1,7 +1,7 @@
 /*
  * config.h
  *
- * Copyright (c) 2022 - 2023 Thomas Buck (thomas@xythobuz.de)
+ * Copyright (c) 2022 - 2024 Thomas Buck (thomas@xythobuz.de)
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -20,24 +20,9 @@
 #define __CONFIG_H__
 
 #define APP_VERSION_MAJOR 0
-#define APP_VERSION_MINOR 3
+#define APP_VERSION_MINOR 1
 
-#define MENU_PREFER_VOLCANO
-//#define MENU_PREFER_CRAFTY
-
-#define VOLCANO_AUTO_CONNECT_TIMEOUT_MS 2000
-#define VOLCANO_AUTO_CONNECT_WITHIN_MS 10000
-
-#define COUNTRY_CODE CYW43_COUNTRY_GERMANY
-
-#ifdef NDEBUG
-// Release build
-#define AUTO_MOUNT_MASS_STORAGE
-#define AUTO_LOG_ON_MASS_STORAGE
-#endif // NDEBUG
-
-#define WATCHDOG_PERIOD_MS 1000
-#define FLASH_LOCK_TIMEOUT_MS 500
+#define WATCHDOG_PERIOD_MS 10
 
 // ASCII 0x18 = CAN (cancel)
 #define ENTER_BOOTLOADER_MAGIC 0x18
@@ -45,13 +30,4 @@
 //#define DISABLE_CDC_DTR_CHECK
 #define DEBOUNCE_DELAY_MS 5
 
-#define SERIAL_WRITES_BLOCK_WHEN_BUFFER_FULL
-
-// TODO needs to be the same as in pack_data.sh
-#define DISK_BLOCK_SIZE 512
-#define DISK_BLOCK_COUNT (256 + 128) // 384 * 512 = 196608
-
-#define TEST_VOLCANO_AUTO_CONNECT "EA:06:75:A7:D1:15 1"
-#define TEST_CRAFTY_AUTO_CONNECT "60:B6:E1:BB:61:36 0"
-
 #endif // __CONFIG_H__
diff --git a/firmware/include/console.h b/firmware/include/console.h
index d10ab3f..00a4262 100644
--- a/firmware/include/console.h
+++ b/firmware/include/console.h
@@ -1,7 +1,7 @@
 /*
  * console.h
  *
- * Copyright (c) 2022 - 2023 Thomas Buck (thomas@xythobuz.de)
+ * Copyright (c) 2022 - 2024 Thomas Buck (thomas@xythobuz.de)
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/firmware/include/lcd.h b/firmware/include/lcd.h
index 21fb17f..39e0cdc 100644
--- a/firmware/include/lcd.h
+++ b/firmware/include/lcd.h
@@ -1,7 +1,7 @@
 /*
  * lipo.h
  *
- * Copyright (c) 2023 Thomas Buck (thomas@xythobuz.de)
+ * Copyright (c) 2023 - 2024 Thomas Buck (thomas@xythobuz.de)
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/firmware/include/log.h b/firmware/include/log.h
index 7241c86..5630c68 100644
--- a/firmware/include/log.h
+++ b/firmware/include/log.h
@@ -1,7 +1,7 @@
 /*
  * log.h
  *
- * Copyright (c) 2022 - 2023 Thomas Buck (thomas@xythobuz.de)
+ * Copyright (c) 2022 - 2024 Thomas Buck (thomas@xythobuz.de)
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -26,17 +26,11 @@
 
 // for output that is stored in the debug log.
 // will be re-played from buffer when terminal connects
-#ifndef PICOWOTA
 #define debug(fmt, ...) debug_log(true, \
         "%08" PRIu32 " %s:%d: " fmt "\r\n", \
         to_ms_since_boot(get_absolute_time()), \
         __func__, __LINE__, \
         ##__VA_ARGS__)
-#else // PICOWOTA
-#define debug(fmt, ...) debug_log(true, \
-        fmt "\r\n", \
-        ##__VA_ARGS__)
-#endif // PICOWOTA
 
 // for interactive output. is not stored or re-played.
 #define print(fmt, ...) debug_log(false, fmt, ##__VA_ARGS__)
@@ -47,8 +41,6 @@ void debug_wait_input(const char *format, ...) __attribute__((format(printf, 1,
 void debug_log_va(bool log, const char *format, va_list args);
 
 void log_dump_to_usb(void);
-void log_dump_to_uart(void);
-void log_dump_to_disk(void);
 
 void debug_handle_input(const void *buff, size_t len);
 
diff --git a/firmware/include/main.h b/firmware/include/main.h
index 50ac2a2..31c3ec4 100644
--- a/firmware/include/main.h
+++ b/firmware/include/main.h
@@ -1,7 +1,7 @@
 /*
  * main.h
  *
- * Copyright (c) 2023 Thomas Buck (thomas@xythobuz.de)
+ * Copyright (c) 2023 - 2024 Thomas Buck (thomas@xythobuz.de)
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/firmware/include/ring.h b/firmware/include/ring.h
index 290d91e..d096e25 100644
--- a/firmware/include/ring.h
+++ b/firmware/include/ring.h
@@ -1,7 +1,7 @@
 /*
  * ring.h
  *
- * Copyright (c) 2023 Thomas Buck (thomas@xythobuz.de)
+ * Copyright (c) 2023 - 2024 Thomas Buck (thomas@xythobuz.de)
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/firmware/include/tusb_config.h b/firmware/include/tusb_config.h
index 3f74bb8..b84c886 100644
--- a/firmware/include/tusb_config.h
+++ b/firmware/include/tusb_config.h
@@ -1,7 +1,7 @@
 /*
  * Extended from TinyUSB example code.
  *
- * Copyright (c) 2022 - 2023 Thomas Buck (thomas@xythobuz.de)
+ * Copyright (c) 2022 - 2024 Thomas Buck (thomas@xythobuz.de)
  *
  * The MIT License (MIT)
  *
diff --git a/firmware/include/usb.h b/firmware/include/usb.h
index fe2c159..ba2bbab 100644
--- a/firmware/include/usb.h
+++ b/firmware/include/usb.h
@@ -1,7 +1,7 @@
 /*
  * usb.h
  *
- * Copyright (c) 2022 - 2023 Thomas Buck (thomas@xythobuz.de)
+ * Copyright (c) 2022 - 2024 Thomas Buck (thomas@xythobuz.de)
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/firmware/include/usb_cdc.h b/firmware/include/usb_cdc.h
index 600296a..eb651b0 100644
--- a/firmware/include/usb_cdc.h
+++ b/firmware/include/usb_cdc.h
@@ -1,7 +1,7 @@
 /*
  * usb_cdc.h
  *
- * Copyright (c) 2022 - 2023 Thomas Buck (thomas@xythobuz.de)
+ * Copyright (c) 2022 - 2024 Thomas Buck (thomas@xythobuz.de)
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/firmware/include/usb_descriptors.h b/firmware/include/usb_descriptors.h
index e2f1b5e..86b7263 100644
--- a/firmware/include/usb_descriptors.h
+++ b/firmware/include/usb_descriptors.h
@@ -1,7 +1,7 @@
 /*
  * usb_descriptors.h
  *
- * Copyright (c) 2022 - 2023 Thomas Buck (thomas@xythobuz.de)
+ * Copyright (c) 2022 - 2024 Thomas Buck (thomas@xythobuz.de)
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/firmware/include/util.h b/firmware/include/util.h
index 27ed4b9..8c71ce2 100644
--- a/firmware/include/util.h
+++ b/firmware/include/util.h
@@ -1,7 +1,7 @@
 /*
  * util.h
  *
- * Copyright (c) 2022 - 2023 Thomas Buck (thomas@xythobuz.de)
+ * Copyright (c) 2022 - 2024 Thomas Buck (thomas@xythobuz.de)
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -19,11 +19,6 @@
 #ifndef __UTIL_H__
 #define __UTIL_H__
 
-void heartbeat_init(void);
-void heartbeat_run(void);
-
-int32_t convert_two_complement(int32_t b);
-
 bool str_startswith(const char *str, const char *start);
 
 void reset_to_bootloader(void);
diff --git a/firmware/src/buttons.c b/firmware/src/buttons.c
index b279316..e12c257 100644
--- a/firmware/src/buttons.c
+++ b/firmware/src/buttons.c
@@ -1,7 +1,7 @@
 /*
  * buttons.c
  *
- * Copyright (c) 2022 - 2023 Thomas Buck (thomas@xythobuz.de)
+ * Copyright (c) 2022 - 2024 Thomas Buck (thomas@xythobuz.de)
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -16,8 +16,6 @@
  * See <http://www.gnu.org/licenses/>.
  */
 
-#include "pico/stdlib.h"
-
 #include "config.h"
 #include "log.h"
 #include "buttons.h"
diff --git a/firmware/src/console.c b/firmware/src/console.c
index fb7974d..f9123e6 100644
--- a/firmware/src/console.c
+++ b/firmware/src/console.c
@@ -1,7 +1,7 @@
 /*
  * console.c
  *
- * Copyright (c) 2022 - 2023 Thomas Buck (thomas@xythobuz.de)
+ * Copyright (c) 2022 - 2024 Thomas Buck (thomas@xythobuz.de)
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -21,9 +21,6 @@
 #include <unistd.h>
 #include <stdio.h>
 
-#include "pico/stdlib.h"
-#include "hardware/watchdog.h"
-
 #include "config.h"
 #include "log.h"
 #include "util.h"
diff --git a/firmware/src/lcd.c b/firmware/src/lcd.c
index 7e659ff..bde65d8 100644
--- a/firmware/src/lcd.c
+++ b/firmware/src/lcd.c
@@ -1,7 +1,7 @@
 /*
  * lcd.c
  *
- * Copyright (c) 2023 Thomas Buck (thomas@xythobuz.de)
+ * Copyright (c) 2023 - 2024 Thomas Buck (thomas@xythobuz.de)
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -16,8 +16,6 @@
  * See <http://www.gnu.org/licenses/>.
  */
 
-#include "pico/stdlib.h"
-
 #include "config.h"
 #include "log.h"
 #include "lcd.h"
diff --git a/firmware/src/log.c b/firmware/src/log.c
index 824078b..29e13ce 100644
--- a/firmware/src/log.c
+++ b/firmware/src/log.c
@@ -1,7 +1,7 @@
 /*
  * log.c
  *
- * Copyright (c) 2022 - 2023 Thomas Buck (thomas@xythobuz.de)
+ * Copyright (c) 2022 - 2024 Thomas Buck (thomas@xythobuz.de)
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,9 +17,6 @@
  */
 
 #include <stdio.h>
-#include <string.h>
-
-#include "hardware/watchdog.h"
 
 #include "config.h"
 #include "main.h"
diff --git a/firmware/src/main.c b/firmware/src/main.c
index afa1f83..d8b913b 100644
--- a/firmware/src/main.c
+++ b/firmware/src/main.c
@@ -1,7 +1,7 @@
 /*
  * main.c
  *
- * Copyright (c) 2022 - 2023 Thomas Buck (thomas@xythobuz.de)
+ * Copyright (c) 2022 - 2024 Thomas Buck (thomas@xythobuz.de)
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -16,11 +16,9 @@
  * See <http://www.gnu.org/licenses/>.
  */
 
-#include "pico/stdlib.h"
 #include "hardware/watchdog.h"
 
 #include "config.h"
-#include "util.h"
 #include "console.h"
 #include "log.h"
 #include "usb.h"
@@ -31,7 +29,6 @@
 void main_loop_hw(void) {
     watchdog_update();
     usb_run();
-    heartbeat_run();
 }
 
 int main(void) {
@@ -50,6 +47,7 @@ int main(void) {
     }
 
     buttons_init();
+    lcd_init();
 
     debug("go");
 
diff --git a/firmware/src/ring.c b/firmware/src/ring.c
index 449b1a8..152e02e 100644
--- a/firmware/src/ring.c
+++ b/firmware/src/ring.c
@@ -1,7 +1,7 @@
 /*
  * ring.c
  *
- * Copyright (c) 2023 Thomas Buck (thomas@xythobuz.de)
+ * Copyright (c) 2023 - 2024 Thomas Buck (thomas@xythobuz.de)
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/firmware/src/usb.c b/firmware/src/usb.c
index 38f88d8..50cba4e 100644
--- a/firmware/src/usb.c
+++ b/firmware/src/usb.c
@@ -1,7 +1,7 @@
 /*
  * Extended from TinyUSB example code.
  *
- * Copyright (c) 2022 - 2023 Thomas Buck (thomas@xythobuz.de)
+ * Copyright (c) 2022 - 2024 Thomas Buck (thomas@xythobuz.de)
  *
  * The MIT License (MIT)
  *
@@ -33,7 +33,6 @@
 #include "config.h"
 #include "log.h"
 #include "usb_descriptors.h"
-#include "usb_cdc.h"
 #include "usb.h"
 
 void usb_init(void) {
diff --git a/firmware/src/usb_cdc.c b/firmware/src/usb_cdc.c
index 4d3f95d..901d541 100644
--- a/firmware/src/usb_cdc.c
+++ b/firmware/src/usb_cdc.c
@@ -1,7 +1,7 @@
 /*
  * Extended from TinyUSB example code.
  *
- * Copyright (c) 2022 - 2023 Thomas Buck (thomas@xythobuz.de)
+ * Copyright (c) 2022 - 2024 Thomas Buck (thomas@xythobuz.de)
  *
  * The MIT License (MIT)
  *
diff --git a/firmware/src/usb_descriptors.c b/firmware/src/usb_descriptors.c
index 4948ddc..8b32ed5 100644
--- a/firmware/src/usb_descriptors.c
+++ b/firmware/src/usb_descriptors.c
@@ -1,7 +1,7 @@
 /*
  * Extended from TinyUSB example code.
  *
- * Copyright (c) 2022 - 2023 Thomas Buck (thomas@xythobuz.de)
+ * Copyright (c) 2022 - 2024 Thomas Buck (thomas@xythobuz.de)
  *
  * The MIT License (MIT)
  *
diff --git a/firmware/src/util.c b/firmware/src/util.c
index aa5d203..4d7a52e 100644
--- a/firmware/src/util.c
+++ b/firmware/src/util.c
@@ -1,7 +1,7 @@
 /*
  * util.c
  *
- * Copyright (c) 2022 - 2023 Thomas Buck (thomas@xythobuz.de)
+ * Copyright (c) 2022 - 2024 Thomas Buck (thomas@xythobuz.de)
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,47 +17,13 @@
  */
 
 #include <string.h>
-#include "pico/stdlib.h"
 #include "pico/bootrom.h"
 #include "hardware/watchdog.h"
 
-#ifdef CYW43_WL_GPIO_LED_PIN
-#include "pico/cyw43_arch.h"
-#endif // CYW43_WL_GPIO_LED_PIN
-
 #include "config.h"
 #include "log.h"
 #include "util.h"
 
-#define HEARTBEAT_INTERVAL_MS 500
-
-void heartbeat_init(void) {
-#ifdef PICO_DEFAULT_LED_PIN
-    gpio_init(PICO_DEFAULT_LED_PIN);
-    gpio_set_dir(PICO_DEFAULT_LED_PIN, GPIO_OUT);
-    gpio_put(PICO_DEFAULT_LED_PIN, 1);
-#endif // PICO_DEFAULT_LED_PIN
-#ifdef CYW43_WL_GPIO_LED_PIN
-    cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, 1);
-#endif // CYW43_WL_GPIO_LED_PIN
-}
-
-void heartbeat_run(void) {
-#if defined(PICO_DEFAULT_LED_PIN) || defined(CYW43_WL_GPIO_LED_PIN)
-    static uint32_t last_heartbeat = 0;
-    uint32_t now = to_ms_since_boot(get_absolute_time());
-    if (now >= (last_heartbeat + HEARTBEAT_INTERVAL_MS)) {
-        last_heartbeat = now;
-#ifdef PICO_DEFAULT_LED_PIN
-        gpio_xor_mask(1 << PICO_DEFAULT_LED_PIN);
-#endif // PICO_DEFAULT_LED_PIN
-#ifdef CYW43_WL_GPIO_LED_PIN
-        cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, !cyw43_arch_gpio_get(CYW43_WL_GPIO_LED_PIN));
-#endif // CYW43_WL_GPIO_LED_PIN
-    }
-#endif // defined(PICO_DEFAULT_LED_PIN) || defined(CYW43_WL_GPIO_LED_PIN)
-}
-
 bool str_startswith(const char *str, const char *start) {
     size_t l = strlen(start);
     if (l > strlen(str)) {
@@ -66,13 +32,6 @@ bool str_startswith(const char *str, const char *start) {
     return (strncmp(str, start, l) == 0);
 }
 
-int32_t convert_two_complement(int32_t b) {
-    if (b & 0x8000) {
-        b = -1 * ((b ^ 0xffff) + 1);
-    }
-    return b;
-}
-
 void reset_to_bootloader(void) {
 #ifdef PICO_DEFAULT_LED_PIN
     reset_usb_boot(1 << PICO_DEFAULT_LED_PIN, 0);