diff --git a/lib/flash_internal.c b/lib/flash_internal.c
deleted file mode 100644
index cf4dedf..0000000
--- a/lib/flash_internal.c
+++ /dev/null
@@ -1,111 +0,0 @@
-/* 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-/** library to read/write internal flash (code)
- *  @file flash_internal.c
- *  @author King Kévin <kingkevin@cuvoodoo.info>
- *  @date 2016
- *  @note peripherals used: none
- */
-/* standard libraries */
-#include <stdint.h> // standard integer types
-#include <stdlib.h> // general utilities
-
-/* STM32 (including CM3) libraries */
-#include <libopencm3/stm32/desig.h> // device signature utilities
-#include <libopencm3/stm32/flash.h> // flash utilities
-
-#include "flash_internal.h" // flash storage library API
-#include "global.h" // global definitions
-
-/** the flash page size (medium-density devices have 1KiB page size) */
-#define PAGE_SIZE 1024
-
-bool flash_internal_read(uint32_t address, uint8_t *buffer, size_t size)
-{
-	// verify it's in the storage area
-	if (address<STORAGE_START || (address+size)>STORAGE_END) {
-		return false;
-	}
-	if (buffer==NULL || size==0) {
-		return false;
-	}
-
-	// copy data byte per byte
-	// a more efficient way would be to copy words, than the remaining bytes
-	for (size_t i=0; i<size; i++) {
-		buffer[i] = *((uint8_t*)address+i);
-	}
-
-	return true;
-}
-
-bool flash_internal_write(uint32_t address, uint8_t *buffer, size_t size)
-{
-	// verify it's in the storage area
-	if (address<STORAGE_START || (address+size)>STORAGE_END) {
-		return false;
-	}
-	if (buffer==NULL || size==0) {
-		return false;
-	}
-
-	uint8_t page[PAGE_SIZE]; // the complete page to write
-
-	flash_unlock(); // unlock flash to be able to write it
-	// go through memory
-	while (size) {
-		uint32_t page_pre = address%PAGE_SIZE; // the beginning data size in the page
-		address -= page_pre; // go to beginning of the page
-		storage_read(address, &page[0], page_pre); // copy existing data
-		if (size>=PAGE_SIZE-page_pre) { // no need to read tailing page data
-			for (uint16_t i=0; i<PAGE_SIZE-page_pre; i++) { // put buffer in page
-				page[page_pre+i] = buffer[i];
-			}
-			buffer += PAGE_SIZE-page_pre; // adjust remaining buffer
-			size -= PAGE_SIZE-page_pre; // adjust remaining size
-		} else { // need read tailing page data
-			for (uint16_t i=0; i<size; i++) { // put buffer in page
-				page[page_pre+i] = buffer[i];
-			}
-			buffer += size; // adjust remaining buffer
-			storage_read(address+page_pre+size, &page[page_pre+size], PAGE_SIZE-page_pre-size); // read tailing page data
-			size = 0; // adjust remaining size
-		}
-
-		// write page
-		flash_erase_page(address); // erase current page
-		if (flash_get_status_flags()!=FLASH_SR_EOP) { // operation went wrong
-			flash_lock(); // lock back flash to protect it
-			return false;
-		}
-		for (uint16_t i=0; i<PAGE_SIZE/2; i++) { // write whole page
-			flash_program_half_word(address+i*2, *((uint16_t*)page+i));
-			if (flash_get_status_flags()!=FLASH_SR_EOP) { // operation went wrong
-				flash_lock(); // lock back flash to protect it
-				return false;
-			}
-			if (*((uint16_t*)address+i)!=*((uint16_t*)page+i)) { // verify the programmed data is right
-				flash_lock(); // lock back flash to protect it
-				return false;
-			}
-		}
-
-		address += PAGE_SIZE; // go to next page
-
-	}
-	flash_lock(); // lock back flash to protect it
-
-	return true;
-}
diff --git a/lib/flash_internal.h b/lib/flash_internal.h
deleted file mode 100644
index aaee58b..0000000
--- a/lib/flash_internal.h
+++ /dev/null
@@ -1,45 +0,0 @@
-/* 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-/** library to read/write internal flash (API)
- *  @file flash_internal.h
- *  @author King Kévin <kingkevin@cuvoodoo.info>
- *  @date 2016
- *  @note peripherals used: none
- */
-#pragma once
-
-#include <libopencm3/stm32/desig.h> // device signature utilities
-
-/** how much data (in bytes) should we be able to store (be sure it's available and does not overlap the firmware) */
-#define STORAGE_SIZE 2048
-/** the end of the flash area where to store data */
-#define STORAGE_END FLASH_BASE+DESIG_FLASH_SIZE
-/** the start of the flash area where to store data (be sure it's after the firmware data) */
-#define STORAGE_START STORAGE_END-STORAGE_SIZE
-
-/** read data from internal flash
- *  @param[in] address start address of the data to read
- *  @param[out] buffer where to store the read data
- *  @param[in] size how much data to read, in bytes
- *  @return if read succeeded
- */
-bool flash_internal_read(uint32_t address, uint8_t *buffer, size_t size);
-/** write data to internal flash
- *  @param[in] address start address where to write data to
- *  @param[in] buffer data to be written
- *  @param[in] size how much data to write, in bytes
- *  @return if write succeeded
- */
-bool flash_internal_write(uint32_t address, uint8_t *buffer, size_t size);
diff --git a/lib/led_ws2812b.c b/lib/led_ws2812b.c
deleted file mode 100644
index 2d9c759..0000000
--- a/lib/led_ws2812b.c
+++ /dev/null
@@ -1,165 +0,0 @@
-/* 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-/** library to drive a WS2812B LED chain (code)
- *  @file led_ws2812b.c
- *  @author King Kévin <kingkevin@cuvoodoo.info>
- *  @date 2016
- *  @note peripherals used: SPI @ref led_ws2812b_spi, timer @ref led_ws2812b_timer, DMA @ref led_ws2812b_dma
- */
-
-/* standard libraries */
-#include <stdint.h> // standard integer types
-#include <stdlib.h> // general utilities
-
-/* STM32 (including CM3) libraries */
-#include <libopencm3/stm32/rcc.h> // real-time control clock library
-#include <libopencm3/stm32/gpio.h> // general purpose input output library
-#include <libopencm3/stm32/spi.h> // SPI library
-#include <libopencm3/stm32/timer.h> // timer library
-#include <libopencm3/stm32/dma.h> // DMA library
-#include <libopencm3/cm3/nvic.h> // interrupt handler
-#include <libopencmsis/core_cm3.h> // Cortex M3 utilities
-
-#include "led_ws2812b.h" // LED WS2812B library API
-#include "global.h" // common methods
-
-/** bit template to encode one byte to be shifted out by SPI to the WS2812B LEDs
- *  @details For each WS2812B bit which needs to be transfered we require to transfer 3 SPI bits.
- *  The first SPI bit is the high start of the WS2812B bit frame.
- *  The second SPI bit determines if the WS2812B bit is a 0 or 1.
- *  The third SPI bit is the last part of the  WS2812B bit frame, which is always low.
- *  The binary pattern is 0b100100100100100100100100
- */
-#define LED_WS2812B_SPI_TEMPLATE 0x924924
-
-uint8_t led_ws2812b_data[LED_WS2812B_LEDS*3*3+40*3/8+1] = {0};  /**< data encoded to be shifted out by SPI for the WS2812B, plus the 50us reset (~40 data bits) */
-static volatile bool transmit_flag = false; /**< flag set in software when transmission started, clear by interrupt when transmission completed */
-
-void led_ws2812b_set_rgb(uint16_t led, uint8_t red, uint8_t green, uint8_t blue)
-{
-	// verify the led exists
-	if (led>=LED_WS2812B_LEDS) {
-		return;
-	}
-	// wait for transmission to complete before changing the color
-	while (transmit_flag) {
-		__WFI();
-	}
-
-	const uint8_t colors[] = {green, red, blue}; // color order for the WS2812B
-	const uint8_t pattern_bit[] = {0x02, 0x10, 0x80, 0x04, 0x20, 0x01, 0x08, 0x40}; // which bit to change in the pattern
-	const uint8_t pattern_byte[] = {2,2,2,1,1,0,0,0}; // in which byte in the pattern to write the pattern bit
-	for (uint8_t color=0; color<LENGTH(colors); color++) { // colors are encoded similarly
-		// fill the middle bit (fixed is faster than calculating it)
-		for (uint8_t bit=0; bit<8; bit++) { // bit from the color to set/clear
-			if (colors[color]&(1<<bit)) { // setting bit
-				led_ws2812b_data[led*3*3+color*3+pattern_byte[bit]] |= pattern_bit[bit]; // setting bit is pattern
-			} else { // clear bit
-				led_ws2812b_data[led*3*3+color*3+pattern_byte[bit]] &= ~pattern_bit[bit]; // clearing bit is pattern
-			}
-		}
-	}
-}
-
-bool led_ws2812b_transmit(void)
-{
-	if (transmit_flag) { // a transmission is already ongoing
-		return false;
-	}
-	transmit_flag = true; // remember transmission started
-	dma_set_memory_address(LED_WS2812B_DMA, LED_WS2812B_DMA_CH, (uint32_t)led_ws2812b_data);
-	dma_set_number_of_data(LED_WS2812B_DMA, LED_WS2812B_DMA_CH, LENGTH(led_ws2812b_data)); // set the size of the data to transmit
-	dma_enable_transfer_complete_interrupt(LED_WS2812B_DMA, LED_WS2812B_DMA_CH); // warm when transfer is complete to stop transmission
-	dma_enable_channel(LED_WS2812B_DMA, LED_WS2812B_DMA_CH); // enable DMA channel
-
-	spi_enable_tx_dma(LED_WS2812B_SPI); // use DMA to provide data stream to be transfered
-
-	timer_set_counter(LED_WS2812B_TIMER, 0); // reset timer counter fro clean clock
-	timer_enable_counter(LED_WS2812B_TIMER); // start timer to generate clock
-	return true;
-}
-
-void led_ws2812b_setup(void)
-{
-	// setup timer to generate clock of (using PWM): 800kHz*3
-	rcc_periph_clock_enable(LED_WS2812B_CLK_RCC); // enable clock for GPIO peripheral
-	gpio_set_mode(LED_WS2812B_CLK_PORT, GPIO_MODE_OUTPUT_10_MHZ, GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, LED_WS2812B_CLK_PIN); // set pin as output
-	rcc_periph_clock_enable(RCC_AFIO); // enable clock for alternate function (PWM)
-	rcc_periph_clock_enable(LED_WS2812B_TIMER_RCC); // enable clock for timer peripheral
-	timer_reset(LED_WS2812B_TIMER); // reset timer state
-	timer_set_mode(LED_WS2812B_TIMER, TIM_CR1_CKD_CK_INT, TIM_CR1_CMS_EDGE, TIM_CR1_DIR_UP); // set timer mode, use undivided timer clock, edge alignment (simple count), and count up
-	timer_set_prescaler(LED_WS2812B_TIMER, 0); // no prescaler to keep most precise timer (72MHz/2^16=1099<800kHz)
-	timer_set_period(LED_WS2812B_TIMER, rcc_ahb_frequency/800000/3-1); // set the clock frequency to 800kHz*3bit since we need to send 3 bits to output a 800kbps stream
-	timer_set_oc_value(LED_WS2812B_TIMER, LED_WS2812B_TIMER_OC, rcc_ahb_frequency/800000/3/2); // duty cycle to 50%
-	timer_set_oc_mode(LED_WS2812B_TIMER, LED_WS2812B_TIMER_OC, TIM_OCM_PWM1); // set timer to generate PWM (used as clock)
-	timer_enable_oc_output(LED_WS2812B_TIMER, LED_WS2812B_TIMER_OC); // enable output to generate the clock
-
-	// setup SPI to transmit data (we are slave and the clock comes from the above PWM): 3 SPI bits for 1 WS2812B bit
-	rcc_periph_clock_enable(LED_WS2812B_SPI_PORT_RCC); // enable clock for SPI IO peripheral
-	gpio_set_mode(LED_WS2812B_SPI_PORT, GPIO_MODE_INPUT, GPIO_CNF_INPUT_FLOAT, LED_WS2812B_SPI_CLK); // set clock as input
-	gpio_set_mode(LED_WS2812B_SPI_PORT, GPIO_MODE_OUTPUT_10_MHZ, GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, LED_WS2812B_SPI_DOUT); // set MISO as output
-	rcc_periph_clock_enable(RCC_AFIO); // enable clock for SPI alternate function
-	rcc_periph_clock_enable(LED_WS2812B_SPI_RCC); // enable clock for SPI peripheral
-	spi_reset(LED_WS2812B_SPI); // clear SPI values to default
-	spi_set_slave_mode(LED_WS2812B_SPI); // set SPI as slave (since we use the clock as input)
-	spi_set_bidirectional_transmit_only_mode(LED_WS2812B_SPI); // we won't receive data
-	spi_set_unidirectional_mode(LED_WS2812B_SPI); // we only need to transmit data
-	spi_set_dff_8bit(LED_WS2812B_SPI); // use 8 bits for simpler encoding (but there will be more interrupts)
-	spi_set_clock_polarity_1(LED_WS2812B_SPI); // clock is high when idle
-	spi_set_clock_phase_1(LED_WS2812B_SPI); // output data on second edge (rising)
-	spi_send_msb_first(LED_WS2812B_SPI); // send least significant bit first
-	spi_enable_software_slave_management(LED_WS2812B_SPI); // control the slave select in software (since there is no master)
-	spi_set_nss_low(LED_WS2812B_SPI); // set NSS low so we can output
-	spi_enable(LED_WS2812B_SPI); // enable SPI 
-	// do not disable SPI or set NSS high since it will put MISO high, breaking the beginning of the next transmission
-	
-	// configure DMA to provide the pattern to be shifted out from SPI to the WS2812B LEDs
-	rcc_periph_clock_enable(LED_WS2812B_DMA_RCC); // enable clock for DMA peripheral
-	dma_channel_reset(LED_WS2812B_DMA, LED_WS2812B_DMA_CH); // start with fresh channel configuration
-	dma_set_memory_address(LED_WS2812B_DMA, LED_WS2812B_DMA_CH, (uint32_t)led_ws2812b_data); // set bit pattern as source address
-	dma_set_peripheral_address(LED_WS2812B_DMA, LED_WS2812B_DMA_CH, (uint32_t)&LED_WS2812B_SPI_DR);  // set SPI as peripheral destination address
-	dma_set_read_from_memory(LED_WS2812B_DMA, LED_WS2812B_DMA_CH); // set direction from memory to peripheral
-	dma_enable_memory_increment_mode(LED_WS2812B_DMA, LED_WS2812B_DMA_CH); // go through bit pattern
-	dma_set_memory_size(LED_WS2812B_DMA, LED_WS2812B_DMA_CH, DMA_CCR_MSIZE_8BIT); // read 8 bits from memory
-	dma_set_peripheral_size(LED_WS2812B_DMA, LED_WS2812B_DMA_CH, DMA_CCR_PSIZE_8BIT); // write 8 bits to peripheral
-	dma_set_priority(LED_WS2812B_DMA, LED_WS2812B_DMA_CH, DMA_CCR_PL_HIGH); // set priority to high since time is crucial for the peripheral
-	nvic_enable_irq(LED_WS2812B_DMA_IRQ); // enable interrupts for this DMA channel
-
-	// fill buffer with bit pattern
-	for (uint16_t i=0; i<LED_WS2812B_LEDS*3; i++) {
-		led_ws2812b_data[i*3+0] = (uint8_t)(LED_WS2812B_SPI_TEMPLATE>>16);
-		led_ws2812b_data[i*3+1] = (uint8_t)(LED_WS2812B_SPI_TEMPLATE>>8);
-		led_ws2812b_data[i*3+2] = (uint8_t)(LED_WS2812B_SPI_TEMPLATE>>0);
-	}
-	// fill remaining with with 0 to encode the reset code
-	for (uint16_t i=LED_WS2812B_LEDS*3*3; i<LENGTH(led_ws2812b_data); i++) {
-		led_ws2812b_data[i] = 0;
-	}
-	led_ws2812b_transmit(); // set LEDs
-}
-
-/** DMA interrupt service routine to stop transmission after it finished */
-void LED_WS2812B_DMA_ISR(void)
-{
-	if (dma_get_interrupt_flag(LED_WS2812B_DMA, LED_WS2812B_DMA_CH, DMA_TCIF)) { // transfer completed
-		dma_clear_interrupt_flags(LED_WS2812B_DMA, LED_WS2812B_DMA_CH, DMA_TCIF); // clear flag
-		dma_disable_transfer_complete_interrupt(LED_WS2812B_DMA, LED_WS2812B_DMA_CH); // stop warning transfer completed
-		spi_disable_tx_dma(LED_WS2812B_SPI); // stop SPI asking for more data
-		while (SPI_SR(LED_WS2812B_SPI) & SPI_SR_BSY); // wait for data to be shifted out
-		timer_disable_counter(LED_WS2812B_TIMER); // stop clock
-		dma_disable_channel(LED_WS2812B_DMA, LED_WS2812B_DMA_CH); // stop using DMA
-		transmit_flag = false; // transmission completed
-	}	
-}
diff --git a/lib/led_ws2812b.h b/lib/led_ws2812b.h
deleted file mode 100644
index b67c132..0000000
--- a/lib/led_ws2812b.h
+++ /dev/null
@@ -1,71 +0,0 @@
-/* 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-/** library to drive a WS2812B LED chain (API)
- *  @file led_ws2812b.h
- *  @author King Kévin <kingkevin@cuvoodoo.info>
- *  @date 2016
- *  @note peripherals used: SPI @ref led_ws2812b_spi, timer @ref led_ws2812b_timer, DMA @ref led_ws2812b_dma
- */
-#pragma once
-
-/** number of LEDs on the WS2812B strip */
-#define LED_WS2812B_LEDS 48
-
-/** peripheral configuration */
-/** @defgroup led_ws2812b_spi SPI peripheral used to control the WS2812B LEDs
- *  @{
- */
-#define LED_WS2812B_SPI SPI1 /**< SPI peripheral */
-#define LED_WS2812B_SPI_DR SPI1_DR /**< SPI data register for the DMA */
-#define LED_WS2812B_SPI_RCC RCC_SPI1 /**< SPI peripheral clock */
-#define LED_WS2812B_SPI_PORT_RCC RCC_GPIOA /**< SPI I/O peripheral clock */
-#define LED_WS2812B_SPI_PORT GPIOA /**< SPI port */
-#define LED_WS2812B_SPI_CLK GPIO_SPI1_SCK /**< SPI clock pin (PA5), connect to PWM output */
-#define LED_WS2812B_SPI_DOUT GPIO_SPI1_MISO /**< SPI data pin (PA6), connect to WS2812B DIN */
-/** @} */
-/** @defgroup led_ws2812b_timer timer peripheral used to generate SPI clock
- *  @{
- */
-#define LED_WS2812B_TIMER TIM3 /**< timer peripheral */
-#define LED_WS2812B_TIMER_RCC RCC_TIM3 /**< timer peripheral clock */
-#define LED_WS2812B_TIMER_OC TIM_OC3 /**< timer output compare used to set PWM frequency */
-#define LED_WS2812B_CLK_RCC RCC_GPIOB /**< timer port peripheral clock */
-#define LED_WS2812B_CLK_PORT GPIOB /**< timer port */
-#define LED_WS2812B_CLK_PIN GPIO_TIM3_CH3 /**< timer pin to output PWM (PB0), connect to SPI clock input */
-/** @} */
-/** @defgroup led_ws2812b_dma DMA peripheral used to send the data
- *  @{
- */
-#define LED_WS2812B_DMA DMA1 /**< DMA peripheral to put data for WS2812B LED in SPI queue (only DMA1 supports SPI1_TX interrupt) */
-#define LED_WS2812B_DMA_RCC RCC_DMA1 /**< DMA peripheral clock */
-#define LED_WS2812B_DMA_CH DMA_CHANNEL3 /**< DMA channel (only DMA1 channel 3 supports SPI1_TX interrupt) */
-#define LED_WS2812B_DMA_IRQ NVIC_DMA1_CHANNEL3_IRQ /**< DMA channel interrupt signal */
-#define LED_WS2812B_DMA_ISR dma1_channel3_isr /**< DMA channel interrupt service routine */
-/** @} */
-
-/** setup WS2812B LED driver */
-void led_ws2812b_setup(void);
-/** set color of a single LED
- *  @param[in] led the LED number to set the color
- *  @param[in] red the red color value to set on the LED
- *  @param[in] green the green color value to set on the LED
- *  @param[in] blue the blue color value to set on the LED
- *  @note transmission needs to be done separately
- */
-void led_ws2812b_set_rgb(uint16_t led, uint8_t red, uint8_t green, uint8_t blue);
-/** transmit color values to WS2812B LEDs
- *  @return true if transmission started, false if another transmission is already ongoing
- */
-bool led_ws2812b_transmit(void);
diff --git a/lib/radio_esp8266.c b/lib/radio_esp8266.c
deleted file mode 100644
index bd66c23..0000000
--- a/lib/radio_esp8266.c
+++ /dev/null
@@ -1,175 +0,0 @@
-/* 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-/** library to send data using ESP8266 WiFi SoC (code)
- *  @file radio_esp8266.c
- *  @author King Kévin <kingkevin@cuvoodoo.info>
- *  @date 2016
- *  @note peripherals used: USART @ref radio_esp8266_usart
- */
-
-/* standard libraries */
-#include <stdint.h> // standard integer types
-#include <stdlib.h> // general utilities
-#include <string.h> // string and memory utilities
-#include <stdio.h> // string utilities
-
-/* STM32 (including CM3) libraries */
-#include <libopencm3/stm32/rcc.h> // real-time control clock library
-#include <libopencm3/stm32/gpio.h> // general purpose input output library
-#include <libopencm3/stm32/usart.h> // universal synchronous asynchronous receiver transmitter library
-#include <libopencm3/cm3/nvic.h> // interrupt handler
-#include <libopencmsis/core_cm3.h> // Cortex M3 utilities
-
-#include "radio_esp8266.h" // radio header and definitions
-#include "global.h" // common methods
-
-/** @defgroup radio_esp8266_usart USART peripheral used for communication with radio
- *  @{
- */
-#define RADIO_ESP8266_USART 2 /**< USART peripheral */
-/** @} */
-
-/* input and output buffers and used memory */
-static uint8_t rx_buffer[24] = {0}; /**< buffer for received data (we only expect AT responses) */
-static volatile uint16_t rx_used = 0; /**< number of byte in receive buffer */
-static uint8_t tx_buffer[256] = {0}; /**< buffer for data to transmit */
-static volatile uint16_t tx_used = 0; /**< number of bytes used in transmit buffer */
-
-volatile bool radio_esp8266_activity = false;
-volatile bool radio_esp8266_success = false;
-
-/** transmit data to radio
- *  @param[in] data data to transmit
- *  @param[in] length length of data to transmit
- */
-static void radio_esp8266_transmit(uint8_t* data, uint8_t length) {
-	while (tx_used || !usart_get_flag(USART(RADIO_ESP8266_USART), USART_SR_TXE)) { // wait until ongoing transmission completed
-		usart_enable_tx_interrupt(USART(RADIO_ESP8266_USART)); // enable transmit interrupt
-		__WFI(); // sleep until something happened
-	}
-	usart_disable_tx_interrupt(USART(RADIO_ESP8266_USART)); // ensure transmit interrupt is disable to prevent index corruption (the ISR should already have done it)
-	radio_esp8266_activity = false; // reset status because of new activity
-	for (tx_used=0; tx_used<length && tx_used<LENGTH(tx_buffer); tx_used++) { // copy data
-		tx_buffer[tx_used] = data[length-1-tx_used]; // put character in buffer (in reverse order)
-	}
-	if (tx_used) {
-		usart_enable_tx_interrupt(USART(RADIO_ESP8266_USART)); // enable interrupt to send bytes
-	}
-}
-
-void radio_esp8266_setup(void)
-{
-	/* enable USART I/O peripheral */
-	rcc_periph_clock_enable(RCC_AFIO); // enable pin alternate function (USART)
-	rcc_periph_clock_enable(USART_PORT_RCC(RADIO_ESP8266_USART)); // enable clock for USART port peripheral
-	rcc_periph_clock_enable(USART_RCC(RADIO_ESP8266_USART)); // enable clock for USART peripheral
-	gpio_set_mode(USART_PORT(RADIO_ESP8266_USART), GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, USART_PIN_TX(RADIO_ESP8266_USART)); // setup GPIO pin USART transmit
-	gpio_set_mode(USART_PORT(RADIO_ESP8266_USART), GPIO_MODE_INPUT, GPIO_CNF_INPUT_PULL_UPDOWN, USART_PIN_RX(RADIO_ESP8266_USART)); // setup GPIO pin USART receive
-	gpio_set(USART_PORT(RADIO_ESP8266_USART), USART_PIN_RX(RADIO_ESP8266_USART)); // pull up to avoid noise when not connected
-
-	/* setup USART parameters for ESP8266 AT firmware */
-	usart_set_baudrate(USART(RADIO_ESP8266_USART), 115200); // AT firmware 0.51 (SDK 1.5.0) uses 115200 bps
-	usart_set_databits(USART(RADIO_ESP8266_USART), 8);
-	usart_set_stopbits(USART(RADIO_ESP8266_USART), USART_STOPBITS_1);
-	usart_set_mode(USART(RADIO_ESP8266_USART), USART_MODE_TX_RX);
-	usart_set_parity(USART(RADIO_ESP8266_USART), USART_PARITY_NONE);
-	usart_set_flow_control(USART(RADIO_ESP8266_USART), USART_FLOWCONTROL_NONE);
-
-	nvic_enable_irq(USART_IRQ(RADIO_ESP8266_USART)); // enable the USART interrupt
-	usart_enable_rx_interrupt(USART(RADIO_ESP8266_USART)); // enable receive interrupt
-	usart_enable(USART(RADIO_ESP8266_USART)); // enable USART
-
-	/* reset buffer states */
-	rx_used = 0;
-	tx_used = 0;
-	radio_esp8266_activity = false;
-	radio_esp8266_success = false;
-
-	radio_esp8266_transmit((uint8_t*)"AT\r\n",4); // verify if module is present
-	while (!radio_esp8266_activity || !radio_esp8266_success) { // wait for response
-		__WFI(); // sleep until something happened
-	}
-	radio_esp8266_transmit((uint8_t*)"AT+RST\r\n",8); // reset module
-	while (!radio_esp8266_activity || !radio_esp8266_success) { // wait for response
-		__WFI(); // sleep until something happened
-	}
-	while(rx_used<13 || memcmp((char*)&rx_buffer[rx_used-13], "WIFI GOT IP\r\n", 13)!=0) { // wait to have IP
-		 __WFI(); // sleep until something happened
-	}
-	radio_esp8266_transmit((uint8_t*)"ATE0\r\n",6); // disable echoing
-	while (!radio_esp8266_activity || !radio_esp8266_success) { // wait for response
-		__WFI(); // sleep until something happened
-	}
-}
-
-void radio_esp8266_tcp_open(char* host, uint16_t port)
-{
-	char command[256] = {0}; // string to create command
-	int length = snprintf(command, LENGTH(command), "AT+CIPSTART=\"TCP\",\"%s\",%u\r\n", host, port); // create AT command to establish a TCP connection
-	if (length>0) {
-		radio_esp8266_transmit((uint8_t*)command, length);
-	}
-}
-
-void radio_esp8266_send(uint8_t* data, uint8_t length)
-{
-	char command[16+1] = {0}; // string to create command
-	int command_length = snprintf(command, LENGTH(command), "AT+CIPSEND=%u\r\n", length); // create AT command to send data
-	if (command_length>0) {
-		radio_esp8266_transmit((uint8_t*)command, command_length); // transmit AT command
-		while (!radio_esp8266_activity || !radio_esp8266_success) { // wait for response
-			__WFI(); // sleep until something happened
-		}
-		if (!radio_esp8266_success) { // send AT command did not succeed
-			return; // don't transmit data
-		}
-		radio_esp8266_transmit(data, length); // transmit data
-	}
-}
-
-void radio_esp8266_close(void)
-{
-	radio_esp8266_transmit((uint8_t*)"AT+CIPCLOSE\r\n", 13); // send AT command to close established connection
-}
-
-/** USART interrupt service routine called when data has been transmitted or received */
-void USART_ISR(RADIO_ESP8266_USART)(void)
-{
-	if (usart_get_interrupt_source(USART(RADIO_ESP8266_USART), USART_SR_TXE)) { // data has been transmitted
-		if (tx_used) { // there is still data in the buffer to transmit
-			usart_send(USART(RADIO_ESP8266_USART),tx_buffer[tx_used-1]); // put data in transmit register
-			tx_used--; // update used size
-		} else { // no data in the buffer to transmit
-			usart_disable_tx_interrupt(USART(RADIO_ESP8266_USART)); // disable transmit interrupt
-		}
-	}
-	if (usart_get_interrupt_source(USART(RADIO_ESP8266_USART), USART_SR_RXNE)) { // data has been received
-		while (rx_used>=LENGTH(rx_buffer)) { // if buffer is full
-			memmove(rx_buffer,&rx_buffer[1],LENGTH(rx_buffer)-1); // drop old data to make space (ring buffer are more efficient but harder to handle)
-			rx_used--; // update used buffer information
-		}
-		rx_buffer[rx_used++] = usart_recv(USART(RADIO_ESP8266_USART)); // put character in buffer
-		// if the used send a packet with these strings during the commands detection the AT command response will break (AT commands are hard to handle perfectly)
-		if (rx_used>=4 && memcmp((char*)&rx_buffer[rx_used-4], "OK\r\n", 4)==0) { // OK received
-			radio_esp8266_activity = true; // response received
-			radio_esp8266_success = true; // command succeeded
-			rx_used = 0; // reset buffer
-		} else if (rx_used>=7 && memcmp((char*)&rx_buffer[rx_used-7], "ERROR\r\n", 7)==0) { // ERROR received
-			radio_esp8266_activity = true; // response received
-			radio_esp8266_success = false; // command failed
-			rx_used = 0; // reset buffer
-		}
-	}
-}
diff --git a/lib/radio_esp8266.h b/lib/radio_esp8266.h
deleted file mode 100644
index 193db70..0000000
--- a/lib/radio_esp8266.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/* 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-/** library to send data using ESP8266 WiFi SoC (API)
- *  @file radio_esp8266.h
- *  @author King Kévin <kingkevin@cuvoodoo.info>
- *  @date 2016
- *  @note peripherals used: USART @ref radio_esp8266_usart
- */
-#pragma once
-
-/** a response has been returned by the radio */
-extern volatile bool radio_esp8266_activity;
-/** the last command has succeeded */
-extern volatile bool radio_esp8266_success;
-
-/** setup peripherals to communicate with radio
- *  @note this is blocking to ensure we are connected to the WiFi network
- */
-void radio_esp8266_setup(void);
-/** establish TCP connection
- *  @param[in] host host to connect to
- *  @param[in] port TCP port to connect to
- *  @note wait for activity to get success status
- */
-void radio_esp8266_tcp_open(char* host, uint16_t port);
-/** send data (requires established connection)
- *  @param[in] data data to send
- *  @param[in] length size of data to send
- *  @note wait for activity to get success status
- */
-void radio_esp8266_send(uint8_t* data, uint8_t length);
-/** close established connection
- *  @note wait for activity to get success status
- */
-void radio_esp8266_close(void);