diff --git a/sketch_timecube/Makefile b/sketch_timecube/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..820dcda9677c094388c03fe314284c50d3e5ac64
--- /dev/null
+++ b/sketch_timecube/Makefile
@@ -0,0 +1,108 @@
+TTY=$(shell ls -1 /dev/ttyUSB* | rev | sort -rn | rev | head -n1)
+
+#
+# Folder Configuration
+#
+ARDU_BASE=${HOME}/Arduino/
+ESP32_BASE=${HOME}/.arduino15/packages/esp32/
+FB_BASE=${ESP32_BASE}/hardware/DFRobot_FireBeetle-ESP32/0.0.9/
+
+#
+# Tool Configuration
+#
+CC=${ESP32_BASE}/tools/xtensa-esp32-elf-gcc/1.22.0-61-gab8375a-5.2.0/bin/xtensa-esp32-elf-gcc
+CXX=${ESP32_BASE}/tools/xtensa-esp32-elf-gcc/1.22.0-61-gab8375a-5.2.0/bin/xtensa-esp32-elf-g++
+ESPPART=python ${FB_BASE}/tools/gen_esp32part.py
+ESPTOOL=python ${FB_BASE}/tools/esptool.py
+
+
+#
+# (System) Include Configuration
+#
+ESP32_INCL_BASE=${FB_BASE}/tools/sdk/include/
+ESP32_INCL_FILES=$(wildcard ${ESP32_INCL_BASE}/*) ${FB_BASE}/cores/esp32 ${FB_BASE}/variants/firebeetle32 ${FB_BASE}/libraries/SPI/src ${FB_BASE}/libraries/WiFi/src
+ESP32_INCL=$(ESP32_INCL_FILES:%=-isystem%)
+
+
+#
+# Compiler Flag Configuration
+#
+CCXXFLAGS =-Os -g3 -flto -Wall -pedantic -Wextra -Wpointer-arith
+CCXXFLAGS+=-nostdlib -ffunction-sections -fdata-sections -fstrict-volatile-bitfields -mlongcalls
+CCXXFLAGS+=-DESP_PLATFORM -DMBEDTLS_CONFIG_FILE=\"mbedtls/esp_config.h\" -DHAVE_CONFIG_H
+CCXXFLAGS+=-DF_CPU=120000000L -DARDUINO=10809 -DARDUINO_ESP32_DEV -DARDUINO_BOARD=\"ESP32_DEV\" -DARDUINO_VARIANT=\"firebeetle32\" -DESP32 -DCORE_DEBUG_LEVEL=0
+# CCXXFLAGS+=-DARDUINO_ARCH_DFROBOT_FIREBEETLE-ESP32 # invalid define emitted by arduino; omitted here
+CCXXFLAGS+=${ESP32_INCL}
+
+CFLAGS=${CCXXFLAGS} -std=gnu11
+CXXFLAGS=${CCXXFLAGS} -std=gnu++11 -fno-rtti
+
+
+#
+# find source files for core files and libraries
+#
+SRC_CORE=$(shell find ${FB_BASE}/cores/esp32/ -type f)
+SRC_FB= $(shell find ${FB_BASE}/variants/firebeetle32/ -type f)
+SRC_SPI= $(shell find ${FB_BASE}/libraries/SPI/src/ -type f)
+SRC_WIFI=$(shell find ${FB_BASE}/libraries/WiFi/src/ -type f)
+
+SRC_CORE_C=$(filter %.c,${SRC_CORE})
+SRC_FB_C= $(filter %.c,${SRC_FB})
+SRC_SPI_C= $(filter %.c,${SRC_SPI})
+SRC_WIFI_C=$(filter %.c,${SRC_WIFI})
+
+SRC_CORE_CXX=$(filter %.cpp,${SRC_CORE})
+SRC_FB_CXX= $(filter %.cpp,${SRC_FB})
+SRC_SPI_CXX= $(filter %.cpp,${SRC_SPI})
+SRC_WIFI_CXX=$(filter %.cpp,${SRC_WIFI})
+
+OBJ_CORE=$(SRC_CORE_C:%.c=%.o) $(SRC_CORE_CXX:%.cpp=%.o)
+OBJ_FB= $(SRC_FB_C:%.c=%.o) $(SRC_FB_CXX:%.cpp=%.o)
+OBJ_SPI= $(SRC_SPI_C:%.c=%.o) $(SRC_SPI_CXX:%.cpp=%.o)
+OBJ_WIFI=$(SRC_WIFI_C:%.c=%.o) $(SRC_WIFI_CXX:%.cpp=%.o)
+
+ALL_OBJ=${OBJ_CORE} ${OBJ_FB} ${OBJ_SPI} ${OBJ_WIFI}
+
+
+#
+# Precompiled libs to link against (default: all)
+#
+LIBS=gcc openssl btdm_app fatfs wps coexist wear_levelling hal newlib driver bootloader_support pp mesh smartconfig jsmn wpa ethernet phy app_trace console ulp wpa_supplicant freertos bt micro-ecc cxx xtensa-debug-module mdns vfs soc core sdmmc coap tcpip_adapter c_nano rtc spi_flash wpa2 esp32 app_update nghttp spiffs espnow nvs_flash esp_adc_cal log expat m c heap mbedtls lwip net80211 pthread json stdc++
+
+#
+# Linker scripts to use
+#
+LSCRIPTS=esp32_out.ld esp32.common.ld esp32.rom.ld esp32.peripherals.ld esp32.rom.spiram_incompatible_fns.ld
+
+#
+# Rules
+#
+
+all: sketch_timecube.bin
+
+sketch_timecube.elf: sketch_timecube.o accelerometer.o ${ALL_OBJ}
+ @echo LD $@
+ @$(CC) -nostdlib -flto -L${FB_BASE}/tools/sdk/lib -L${FB_BASE}/tools/sdk/ld $(LSCRIPTS:%=-T %) \
+ -Wl,--gc-sections -Wl,-static -Wl,--undefined=uxTopUsedPriority -u ld_include_panic_highint_hdl -u call_user_start_cpu0 -u __cxa_guard_dummy -u __cxx_fatal_exception \
+ -Wl,--start-group $^ $(LIBS:%=-l%) -Wl,--end-group -Wl,-EL -o $@
+
+%.o: %.cpp
+ @echo CXX $<
+ @$(CXX) $(CXXFLAGS) -c $< -o $@
+
+%.o: %.c
+ @echo CC $<
+ @$(CC) $(CFLAGS) -c $< -o $@
+
+partitions.bin: ${FB_BASE}/tools/partitions/no_ota.csv
+ ${ESPPART} --disable-md5sum -q ${FB_BASE}/tools/partitions/no_ota.csv partitions.bin
+
+%.bin: %.elf
+ ${ESPTOOL} --chip esp32 elf2image --flash_mode dio --flash_freq 80m --flash_size 4MB -o $@ $<
+
+flash: sketch_timecube.bin partitions.bin ${FB_BASE}/tools/sdk/bin/bootloader.bin ${FB_BASE}/tools/partitions/boot_app0.bin
+ @echo FLASH $< to ${TTY}
+ @${ESPTOOL} --chip esp32 --port ${TTY} --baud 460800 --before default_reset --after hard_reset write_flash -z --flash_freq 80m --flash_mode dio --flash_size 4MB 0x1000 ${FB_BASE}/tools/sdk/bin/bootloader.bin 0x8000 partitions.bin 0xe000 ${FB_BASE}/tools/partitions/boot_app0.bin 0x10000 sketch_timecube.bin
+
+print-%:
+ @echo $* = $($*)
diff --git a/sketch_timecube/sketch_timecube.cpp b/sketch_timecube/sketch_timecube.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..975488a24b88d7c761e743ee1efd99ca0acaa013
--- /dev/null
+++ b/sketch_timecube/sketch_timecube.cpp
@@ -0,0 +1,441 @@
+#include <Arduino.h>
+#include <WiFi.h>
+#include <esp_bt.h>
+#include <esp_wifi.h>
+#include <esp_wpa2.h>
+#include <esp_sleep.h>
+#include <driver/gpio.h>
+#include <driver/rtc_io.h>
+#include <driver/adc.h>
+
+#include "accelerometer.h"
+#include "config.h"
+
+#ifdef SERIAL_DEBUG
+#define SDBG(MSG) Serial.print(MSG)
+#define SDBGF(MSG, ...) Serial.printf(MSG, __VA_ARGS__)
+#define SDBGLN(MSG) Serial.println(MSG)
+#else
+#define SDBG(MSG)
+#define SDBGF(MSG, ...)
+#define SDBGLN(MSG)
+#endif
+
+
+void resetSystem();
+
+
+const uint8_t side_translate[6] = SIDE_MAPPING;
+RTC_DATA_ATTR uint8_t timelog_entry = 0;
+RTC_DATA_ATTR time_t timelog[TIMELOG_MAX];
+RTC_DATA_ATTR time_t wakeup = SYNC_INTERVAL;
+
+RTC_DATA_ATTR unsigned deep_sleep = 0;
+RTC_DATA_ATTR unsigned sync_counter = 0;
+RTC_DATA_ATTR unsigned bug_counter = 0;
+
+RTC_DATA_ATTR bool wifi_active = false;
+
+static_assert(sizeof(time_t) == 4, "time_t Size");
+
+static Accelerometer accel = Accelerometer(ACCEL_CS_PIN);
+static hw_timer_t *timer = nullptr;
+
+const uint8_t UNKNOWN_BATTERY = 0xFF;
+static uint8_t getBattery() {
+ static uint8_t battery = UNKNOWN_BATTERY;
+
+ if(UNKNOWN_BATTERY == battery) {
+ SDBGLN("Reading Battery State via ADC:");
+
+ SDBGLN(" * Starting ADC...");
+ adc_power_on();
+ analogSetAttenuation(ADC_11db);
+ analogReadResolution(12);
+
+ SDBGLN(" * Read from ADC...");
+ int val = analogRead(A0);
+
+ SDBGLN(" * Stopping ADC...");
+ adc_power_off();
+
+ SDBGF(" * Voltage from ADC: %d\n", val);
+ if (val > BATTERY_MAX) {
+ battery = 100;
+ } else if (val < BATTERY_MIN) {
+ battery = 0;
+ } else {
+ battery = (val - BATTERY_MIN) * 100 / (BATTERY_MAX - BATTERY_MIN);
+ }
+ SDBGF(" * Battery State from ADC: %d%%\n", battery);
+ } else {
+ SDBGF("Using Battery State from Previous Call: %d%%\n", battery);
+ }
+
+ return battery;
+}
+
+static uint8_t getSide() {
+ uint8_t state = accel.getMovement();
+ for (uint8_t p = 0; p < 6; p++){
+ if ((state & 0x3f) == (1 << p))
+ return side_translate[p];
+ }
+ return 0;
+}
+
+static uint8_t getStableSide(){
+ // Get current side
+ uint8_t side_last = getSide();
+ // try to save power during sleep
+ esp_sleep_enable_timer_wakeup(SIDE_DELAY * 1000);
+ // we need SIDE_COUNT stable reads
+ for (uint8_t n = 0 ; n < SIDE_COUNT ; n++){
+ // try light sleep, fall back to delay
+ if (esp_light_sleep_start() != ESP_OK){
+ SDBGLN("delay");
+ delay(SIDE_DELAY);
+ }
+ // Update Side
+ uint8_t side = getSide();
+ // check if stable or reset
+ if (side_last != side){
+ side_last = side;
+ n = 0;
+ }
+ }
+ return side_last;
+}
+
+
+/*! \brief Check active side (and create entry in timelog if changed)
+ * \param forceNewEntry create a new entry in timelog even if the side hasnt changed
+ * \return true if a new entry was created
+ */
+static bool checkSide(bool forceNewEntry = false){
+ uint8_t side = getStableSide();
+ if (timelog_entry < TIMELOG_MAX && (forceNewEntry || timelog_entry == 0 || side != (timelog[timelog_entry - 1] & 0x7))){
+ time_t timestamp;
+ time(×tamp);
+ timestamp &= ~(0x7);
+ timestamp |= side;
+ timelog[timelog_entry++] = timestamp;
+ SDBGF("Derzeit akive Seite: %d\n", side);
+ return true;
+ }
+ return false;
+}
+
+/*! \brief Connect to WLAN using given credentials
+ */
+static void wlanSetup(){
+ // Disconnect previous WLAN session (although there shouldn't be any)
+ WiFi.disconnect(true);
+
+ SDBG("Connecting to WLAN " WLAN_SSID);
+ WiFi.mode(WIFI_STA);
+ #ifdef WLAN_IDENTITY
+ SDBGLN(" using EAP");
+ // Use EAP
+ esp_wifi_sta_wpa2_ent_set_identity((uint8_t *)WLAN_ANONYMOUS_IDENTITY, strlen(WLAN_ANONYMOUS_IDENTITY));
+ esp_wifi_sta_wpa2_ent_set_username((uint8_t *)WLAN_IDENTITY, strlen(WLAN_IDENTITY));
+ esp_wifi_sta_wpa2_ent_set_password((uint8_t *)WLAN_PASSWORD, strlen(WLAN_PASSWORD));
+ esp_wpa2_config_t wlan_config = WPA2_CONFIG_INIT_DEFAULT();
+ esp_wifi_sta_wpa2_ent_enable(&wlan_config);
+ WiFi.begin(WLAN_SSID);
+ #else
+ SDBGLN();
+ // Simple connection
+ WiFi.begin(WLAN_SSID, WLAN_PASSWORD);
+ #endif
+ wifi_active = true;
+}
+
+/*! \brief Wait for WLAN connection
+ * \return true on success, false if timed out
+ */
+static bool wlanConnect(){
+ int stat, prev = 0;
+ for (int c = 0; (stat = WiFi.status()) != WL_CONNECTED ; c++) {
+ delay(WLAN_RECONNECT_DELAY);
+ if (stat != prev) {
+ prev = stat;
+ switch (stat) {
+ case WL_NO_SHIELD: SDBG("[no WLAN Shield]"); break;
+ case WL_IDLE_STATUS: SDBG("[WLAN Idle]"); break;
+ case WL_NO_SSID_AVAIL: SDBG("[no WLAN SSID]"); break;
+ case WL_SCAN_COMPLETED: SDBG("[WLAN scan completed]"); break;
+ case WL_CONNECT_FAILED: SDBG("[WLAN connect failed]"); break;
+ case WL_CONNECTION_LOST: SDBG("[WLAN connection lost]"); break;
+ case WL_DISCONNECTED: SDBG("[WLAN disconnected]"); break;
+ default: SDBG("[WLAN status unknown]");
+ }
+ }
+ SDBG(".");
+ if (c >= WLAN_RECONNECT_TRIES) {
+ SDBGLN("Keine WLAN Verbindung moeglich");
+ return false;
+ }
+ }
+ return true;
+}
+
+/*! \brief Update RTC using NTP
+ * \return false if no WLAN connection available
+ */
+static bool updateTime() {
+ // NTP
+ time_t old_ts;
+ time(&old_ts);
+
+ if (!wlanConnect()) {
+ return false;
+ }
+
+ configTime(0, 0, SYNC_NTP1, SYNC_NTP2, SYNC_NTP3);
+ delay(300);
+
+ time_t new_ts;
+ time(&new_ts);
+
+ // check if we have an initial update
+ if (old_ts < RTC_TIMESTAMP_THS && new_ts > RTC_TIMESTAMP_THS) {
+ SDBGLN("Aktualisiere Timelog mit neuer Uhrzeit");
+ uint32_t delta = new_ts - old_ts;
+ // Update entries
+ delta &= ~(0x7);
+ for (int i = 0; i < timelog_entry; i++)
+ timelog[i] += delta;
+ }
+
+ return true;
+}
+
+static bool uploadData(){
+ if(wlanConnect()) {
+ uint64_t mac = ESP.getEfuseMac();
+ uint8_t battery = getBattery();
+ time_t now;
+ time(&now);
+
+ // Debug status
+ const size_t content_length = (timelog_entry == 0) ? 15 : (17 + timelog_entry * 9);
+ #ifdef SERIAL_DEBUG
+ {
+ SDBGF("Trying to send %d timelog entries (Content-Length: %d Bytes) to " SYNC_HTTP_HOST "\n", timelog_entry, content_length);
+ SDBGF(" MAC: %04X%08X\n",(uint16_t)(mac>>32), (uint32_t)mac);
+ SDBGF(" Battery: %d%%\n", battery);
+ SDBGF(" Current Time: %ld\n", now);
+ SDBGLN(" Data:");
+ for (int i = 0; i < timelog_entry; i++){
+ const uint8_t side = timelog[i] & 0x7;
+ const uint32_t ts = timelog[i] & ~(0x7);
+ SDBGF(" [%d] = at %d -> side %d\n", i, ts, side);
+ }
+ }
+ #endif
+
+ WiFiClient client;
+ client.setTimeout(1500);
+ if (client.connect(SYNC_HTTP_HOST, 80)) {
+ client.printf("POST /%04X%08X/upload HTTP/1.1\r\n", (uint16_t)(mac>>32), (uint32_t)mac);
+ client.print ("Host: " SYNC_HTTP_HOST "\r\n");
+ client.print ("User-Agent: i4Zeitwuerfel\r\n");
+ client.print ("Content-Type: application/x-www-form-urlencoded\r\n");
+ client.printf("Content-Length: %d\r\n\r\n", content_length);
+
+ client.printf("v=%02X&t=%08X", battery, now);
+ if (timelog_entry > 0) {
+ client.printf("&d=%08X", timelog[0]);
+ for (int i = 1; i < timelog_entry; i++) {
+ client.printf("+%08X", timelog[i]);
+ }
+ }
+
+ SDBGLN(" Response from " SYNC_HTTP_HOST ":");
+ for (int t = 0; t<20 && client.connected();t++) {
+ String line = client.readStringUntil('\n');
+ SDBGF(" [line %d] %s\n", t, line.c_str());
+ if (line == "HTTP/1.1 200 OK\r" || line == "HTTP/1.0 200 OK\r") {
+ return true;
+ }
+ if (line == "\r") {
+ break;
+ }
+ }
+ } else
+ SDBGLN("Verbindungsprobleme");
+ }
+ return false;
+}
+
+static bool sync() {
+ wlanSetup();
+
+ if (!wlanConnect())
+ return false;
+
+ SDBGF("IP: %s\n", WiFi.localIP().toString().c_str());
+ delay(WLAN_RECONNECT_DELAY);
+
+ bool ret = true;
+ if (!updateTime()){
+ ret = false;
+ SDBGLN("NTP fehlgeschlagen");
+ }
+
+ if (uploadData()) {
+ // Reset entries
+ timelog[0] = timelog[timelog_entry - 1];
+ timelog_entry = 1;
+ SDBGLN("HTTP Upload erfolgreich");
+ } else {
+ ret = false;
+ SDBGLN("HTTP Upload fehlgeschlagen");
+ }
+
+ WiFi.disconnect(true);
+
+ return ret;
+}
+
+static void gotoDeepSleep(unsigned long long wakeupTime, bool force = false) {
+ SDBGF("Preparing for Sleep #%d:\n", ++deep_sleep);
+
+ if(wifi_active && !force) {
+ SDBGLN(" * Powering down WiFi...");
+ esp_wifi_stop();
+ wifi_active = false;
+ }
+
+ esp_sleep_pd_config(ESP_PD_DOMAIN_RTC_PERIPH, ESP_PD_OPTION_ON);
+ rtc_gpio_isolate(ACCEL_INT_PIN);
+
+ esp_sleep_enable_ext0_wakeup(ACCEL_INT_PIN, 1);
+ esp_sleep_enable_timer_wakeup(wakeupTime);
+
+ SDBGLN(" * Stopping Watchdog...");
+ timerAlarmDisable(timer);
+ timerEnd(timer);
+
+ SDBGLN(" * Entering deep sleep...");
+#ifdef SERIAL_DEBUG
+ Serial.flush();
+#endif
+ esp_deep_sleep_start();
+}
+
+void setup() {
+ #ifdef SERIAL_DEBUG
+ // Initialize Serial connection for debug output
+ Serial.begin(SERIAL_DEBUG);
+ #endif
+
+ // Wait 10 ms
+ delay(10);
+
+ SDBGF("Starting Watchdog (Bug Counter: %d)...\n", bug_counter);
+ #define DEINIT_TIMEOUT (60 * 1000 * 1000)
+ timer = timerBegin(0, 80, true);
+ timerAttachInterrupt(timer, &resetSystem, true);
+ timerAlarmWrite(timer, DEINIT_TIMEOUT, false);
+ timerAlarmEnable(timer);
+
+ // disable unused components on first start
+ if(0 == deep_sleep) {
+ SDBGLN("Powering down BT and ADC...");
+ esp_bt_controller_disable();
+ adc_power_off();
+ }
+
+
+ // Light blue LED (on FireBeetle)
+ pinMode(STATUS_LED_PIN, OUTPUT);
+ digitalWrite(STATUS_LED_PIN, HIGH);
+
+ // print current timestamp to serial (debugging)
+ {
+ time_t now;
+ time(&now);
+ SDBGF("Wakeup at %ld\n", now);
+ }
+
+ // Set up Accelerometer
+ if (!accel.begin()) {
+ SDBGLN("Beschleunigungssensor antwortet nicht.");
+ } else {
+ accel.setClickInterrupt(3, ACCEL_CLICK_THS);
+ accel.setMovementInterrupt();
+ }
+
+ // Get Wakeup source
+ esp_sleep_wakeup_cause_t wakeup_reason = esp_sleep_get_wakeup_cause();
+ SDBG("Wakeup reason: ");
+ switch(wakeup_reason) {
+ // Valid
+ case 0: SDBGLN("Reboot"); break;
+ case ESP_SLEEP_WAKEUP_EXT0: SDBGLN("EXT0"); break;
+ case ESP_SLEEP_WAKEUP_TIMER: SDBGLN("Timer"); break;
+
+ // Invalid
+ case ESP_SLEEP_WAKEUP_EXT1: SDBGLN("EXT1 (should not happen)"); break;
+ case ESP_SLEEP_WAKEUP_TOUCHPAD: SDBGLN("Touchpad (should not happen)"); break;
+ case ESP_SLEEP_WAKEUP_ULP: SDBGLN("ULP (should not happen)"); break;
+ default : SDBGF("Unknown reason %d (should not happen)\n", wakeup_reason); break;
+ }
+
+ // Do we need an WLAN synchronization?
+ bool update = (wakeup_reason == ESP_SLEEP_WAKEUP_TIMER) || (wakeup_reason == ESP_SLEEP_WAKEUP_UNDEFINED) || (timelog_entry > TIMELOG_MAX);
+
+ // check tap
+ uint8_t click = accel.getClick();
+ if (click != 0 && (click & 0x30)){
+ SDBGLN("Synchronisiere aufgrund von Klopfen");
+ update = true;
+ }
+
+ // Timer wakeup
+ time_t now;
+ time(&now);
+ if (now >= wakeup) {
+ update = true;
+ }
+
+ // check side
+ checkSide(update);
+
+ // do update
+ if (update){
+ SDBGF("Sync #%d\n", ++sync_counter);
+ sync();
+
+ // New Timer Wakeup
+ time(&now);
+ wakeup = now + SYNC_INTERVAL;
+
+ // safety - if wlan connection was slow, lets check current side again, maybe it has been flipped meanwhile
+ checkSide();
+ }
+
+ // calculate next wakeup
+ if (wakeup - now < 1) {
+ wakeup = now + 1;
+ }
+ gotoDeepSleep((wakeup - now) * 1000000ULL);
+}
+
+void resetSystem() {
+ ++bug_counter;
+
+ SDBGLN("-=================-");
+ SDBGLN("|~~~ BUG ~~~|");
+ SDBGLN("-=================-");
+
+ SDBGF("[BUG %d] Watchdog triggered; Resetting System\n", bug_counter);
+#ifdef SERIAL_DEBUG
+ Serial.flush();
+#endif
+ gotoDeepSleep(5 * 1000ULL * 1000ULL, /* force = */ true);
+}
+
+void loop() { /* This is never going to be called due to deep sleep. */ }
diff --git a/sketch_timecube/sketch_timecube.ino b/sketch_timecube/sketch_timecube.ino
index adddb5e4ede40068273d4ee87097dcfe78fed979..2f804299452188c83b372e54f4b2bca85493df2d 100644
--- a/sketch_timecube/sketch_timecube.ino
+++ b/sketch_timecube/sketch_timecube.ino
@@ -1,436 +1,4 @@
-#include <WiFi.h>
-#include <esp_bt.h>
-#include <esp_wifi.h>
-#include <esp_wpa2.h>
-#include <esp_sleep.h>
-#include <driver/gpio.h>
-#include <driver/rtc_io.h>
-#include <driver/adc.h>
-
-#include "accelerometer.h"
-#include "config.h"
-
-#ifdef SERIAL_DEBUG
-#define SDBG(MSG) Serial.print(MSG)
-#define SDBGF(MSG, ...) Serial.printf(MSG, __VA_ARGS__)
-#define SDBGLN(MSG) Serial.println(MSG)
-#else
-#define SDBG(MSG)
-#define SDBGF(MSG, ...)
-#define SDBGLN(MSG)
-#endif
-
-const uint8_t side_translate[6] = SIDE_MAPPING;
-RTC_DATA_ATTR uint8_t timelog_entry = 0;
-RTC_DATA_ATTR time_t timelog[TIMELOG_MAX];
-RTC_DATA_ATTR time_t wakeup = SYNC_INTERVAL;
-
-RTC_DATA_ATTR unsigned deep_sleep = 0;
-RTC_DATA_ATTR unsigned sync_counter = 0;
-RTC_DATA_ATTR unsigned bug_counter = 0;
-
-RTC_DATA_ATTR bool wifi_active = false;
-
-static_assert(sizeof(time_t) == 4, "time_t Size");
-
-static Accelerometer accel = Accelerometer(ACCEL_CS_PIN);
-static hw_timer_t *timer = nullptr;
-
-const uint8_t UNKNOWN_BATTERY = 0xFF;
-static uint8_t getBattery() {
- static uint8_t battery = UNKNOWN_BATTERY;
-
- if(UNKNOWN_BATTERY == battery) {
- SDBGLN("Reading Battery State via ADC:");
-
- SDBGLN(" * Starting ADC...");
- adc_power_on();
- analogSetAttenuation(ADC_11db);
- analogReadResolution(12);
-
- SDBGLN(" * Read from ADC...");
- int val = analogRead(A0);
-
- SDBGLN(" * Stopping ADC...");
- adc_power_off();
-
- SDBGF(" * Voltage from ADC: %d\n", val);
- if (val > BATTERY_MAX) {
- battery = 100;
- } else if (val < BATTERY_MIN) {
- battery = 0;
- } else {
- battery = (val - BATTERY_MIN) * 100 / (BATTERY_MAX - BATTERY_MIN);
- }
- SDBGF(" * Battery State from ADC: %d%%\n", battery);
- } else {
- SDBGF("Using Battery State from Previous Call: %d%%\n", battery);
- }
-
- return battery;
-}
-
-static uint8_t getSide() {
- uint8_t state = accel.getMovement();
- for (uint8_t p = 0; p < 6; p++){
- if ((state & 0x3f) == (1 << p))
- return side_translate[p];
- }
- return 0;
-}
-
-static uint8_t getStableSide(){
- // Get current side
- uint8_t side_last = getSide();
- // try to save power during sleep
- esp_sleep_enable_timer_wakeup(SIDE_DELAY * 1000);
- // we need SIDE_COUNT stable reads
- for (uint8_t n = 0 ; n < SIDE_COUNT ; n++){
- // try light sleep, fall back to delay
- if (esp_light_sleep_start() != ESP_OK){
- SDBGLN("delay");
- delay(SIDE_DELAY);
- }
- // Update Side
- uint8_t side = getSide();
- // check if stable or reset
- if (side_last != side){
- side_last = side;
- n = 0;
- }
- }
- return side_last;
-}
-
-
-/*! \brief Check active side (and create entry in timelog if changed)
- * \param forceNewEntry create a new entry in timelog even if the side hasnt changed
- * \return true if a new entry was created
- */
-static bool checkSide(bool forceNewEntry = false){
- uint8_t side = getStableSide();
- if (timelog_entry < TIMELOG_MAX && (forceNewEntry || timelog_entry == 0 || side != (timelog[timelog_entry - 1] & 0x7))){
- time_t timestamp;
- time(×tamp);
- timestamp &= ~(0x7);
- timestamp |= side;
- timelog[timelog_entry++] = timestamp;
- SDBGF("Derzeit akive Seite: %d\n", side);
- return true;
- }
- return false;
-}
-
-/*! \brief Connect to WLAN using given credentials
- */
-static void wlanSetup(){
- // Disconnect previous WLAN session (although there shouldn't be any)
- WiFi.disconnect(true);
-
- SDBG("Connecting to WLAN " WLAN_SSID);
- WiFi.mode(WIFI_STA);
- #ifdef WLAN_IDENTITY
- SDBGLN(" using EAP");
- // Use EAP
- esp_wifi_sta_wpa2_ent_set_identity((uint8_t *)WLAN_ANONYMOUS_IDENTITY, strlen(WLAN_ANONYMOUS_IDENTITY));
- esp_wifi_sta_wpa2_ent_set_username((uint8_t *)WLAN_IDENTITY, strlen(WLAN_IDENTITY));
- esp_wifi_sta_wpa2_ent_set_password((uint8_t *)WLAN_PASSWORD, strlen(WLAN_PASSWORD));
- esp_wpa2_config_t wlan_config = WPA2_CONFIG_INIT_DEFAULT();
- esp_wifi_sta_wpa2_ent_enable(&wlan_config);
- WiFi.begin(WLAN_SSID);
- #else
- SDBGLN();
- // Simple connection
- WiFi.begin(WLAN_SSID, WLAN_PASSWORD);
- #endif
- wifi_active = true;
-}
-
-/*! \brief Wait for WLAN connection
- * \return true on success, false if timed out
- */
-static bool wlanConnect(){
- int stat, prev = 0;
- for (int c = 0; (stat = WiFi.status()) != WL_CONNECTED ; c++) {
- delay(WLAN_RECONNECT_DELAY);
- if (stat != prev) {
- prev = stat;
- switch (stat) {
- case WL_NO_SHIELD: SDBG("[no WLAN Shield]"); break;
- case WL_IDLE_STATUS: SDBG("[WLAN Idle]"); break;
- case WL_NO_SSID_AVAIL: SDBG("[no WLAN SSID]"); break;
- case WL_SCAN_COMPLETED: SDBG("[WLAN scan completed]"); break;
- case WL_CONNECT_FAILED: SDBG("[WLAN connect failed]"); break;
- case WL_CONNECTION_LOST: SDBG("[WLAN connection lost]"); break;
- case WL_DISCONNECTED: SDBG("[WLAN disconnected]"); break;
- default: SDBG("[WLAN status unknown]");
- }
- }
- SDBG(".");
- if (c >= WLAN_RECONNECT_TRIES) {
- SDBGLN("Keine WLAN Verbindung moeglich");
- return false;
- }
- }
- return true;
-}
-
-/*! \brief Update RTC using NTP
- * \return false if no WLAN connection available
- */
-static bool updateTime() {
- // NTP
- time_t old_ts;
- time(&old_ts);
-
- if (!wlanConnect()) {
- return false;
- }
-
- configTime(0, 0, SYNC_NTP1, SYNC_NTP2, SYNC_NTP3);
- delay(300);
-
- time_t new_ts;
- time(&new_ts);
-
- // check if we have an initial update
- if (old_ts < RTC_TIMESTAMP_THS && new_ts > RTC_TIMESTAMP_THS) {
- SDBGLN("Aktualisiere Timelog mit neuer Uhrzeit");
- uint32_t delta = new_ts - old_ts;
- // Update entries
- delta &= ~(0x7);
- for (int i = 0; i < timelog_entry; i++)
- timelog[i] += delta;
- }
-
- return true;
-}
-
-static bool uploadData(){
- if(wlanConnect()) {
- uint64_t mac = ESP.getEfuseMac();
- uint8_t battery = getBattery();
- time_t now;
- time(&now);
-
- // Debug status
- const size_t content_length = (timelog_entry == 0) ? 15 : (17 + timelog_entry * 9);
- #ifdef SERIAL_DEBUG
- {
- SDBGF("Trying to send %d timelog entries (Content-Length: %d Bytes) to " SYNC_HTTP_HOST "\n", timelog_entry, content_length);
- SDBGF(" MAC: %04X%08X\n",(uint16_t)(mac>>32), (uint32_t)mac);
- SDBGF(" Battery: %d%%\n", battery);
- SDBGF(" Current Time: %ld\n", now);
- SDBGLN(" Data:");
- for (int i = 0; i < timelog_entry; i++){
- const uint8_t side = timelog[i] & 0x7;
- const uint32_t ts = timelog[i] & ~(0x7);
- SDBGF(" [%d] = at %d -> side %d\n", i, ts, side);
- }
- }
- #endif
-
- WiFiClient client;
- client.setTimeout(1500);
- if (client.connect(SYNC_HTTP_HOST, 80)) {
- client.printf("POST /%04X%08X/upload HTTP/1.1\r\n", (uint16_t)(mac>>32), (uint32_t)mac);
- client.print ("Host: " SYNC_HTTP_HOST "\r\n");
- client.print ("User-Agent: i4Zeitwuerfel\r\n");
- client.print ("Content-Type: application/x-www-form-urlencoded\r\n");
- client.printf("Content-Length: %d\r\n\r\n", content_length);
-
- client.printf("v=%02X&t=%08X", battery, now);
- if (timelog_entry > 0) {
- client.printf("&d=%08X", timelog[0]);
- for (int i = 1; i < timelog_entry; i++) {
- client.printf("+%08X", timelog[i]);
- }
- }
-
- SDBGLN(" Response from " SYNC_HTTP_HOST ":");
- for (int t = 0; t<20 && client.connected();t++) {
- String line = client.readStringUntil('\n');
- SDBGF(" [line %d] %s\n", t, line.c_str());
- if (line == "HTTP/1.1 200 OK\r" || line == "HTTP/1.0 200 OK\r") {
- return true;
- }
- if (line == "\r") {
- break;
- }
- }
- } else
- SDBGLN("Verbindungsprobleme");
- }
- return false;
-}
-
-static bool sync() {
- wlanSetup();
-
- if (!wlanConnect())
- return false;
-
- SDBGF("IP: %s\n", WiFi.localIP().toString().c_str());
- delay(WLAN_RECONNECT_DELAY);
-
- bool ret = true;
- if (!updateTime()){
- ret = false;
- SDBGLN("NTP fehlgeschlagen");
- }
-
- if (uploadData()) {
- // Reset entries
- timelog[0] = timelog[timelog_entry - 1];
- timelog_entry = 1;
- SDBGLN("HTTP Upload erfolgreich");
- } else {
- ret = false;
- SDBGLN("HTTP Upload fehlgeschlagen");
- }
-
- WiFi.disconnect(true);
-
- return ret;
-}
-
-static void gotoDeepSleep(unsigned long long wakeupTime, bool force = false) {
- SDBGF("Preparing for Sleep #%d:\n", ++deep_sleep);
-
- if(wifi_active && !force) {
- SDBGLN(" * Powering down WiFi...");
- esp_wifi_stop();
- wifi_active = false;
- }
-
- esp_sleep_pd_config(ESP_PD_DOMAIN_RTC_PERIPH, ESP_PD_OPTION_ON);
- rtc_gpio_isolate(ACCEL_INT_PIN);
-
- esp_sleep_enable_ext0_wakeup(ACCEL_INT_PIN, 1);
- esp_sleep_enable_timer_wakeup(wakeupTime);
-
- SDBGLN(" * Stopping Watchdog...");
- timerAlarmDisable(timer);
- timerEnd(timer);
-
- SDBGLN(" * Entering deep sleep...");
-#ifdef SERIAL_DEBUG
- Serial.flush();
-#endif
- esp_deep_sleep_start();
-}
-
-void setup() {
- #ifdef SERIAL_DEBUG
- // Initialize Serial connection for debug output
- Serial.begin(SERIAL_DEBUG);
- #endif
-
- // Wait 10 ms
- delay(10);
-
- SDBGF("Starting Watchdog (Bug Counter: %d)...\n", bug_counter);
- #define DEINIT_TIMEOUT (60 * 1000 * 1000)
- timer = timerBegin(0, 80, true);
- timerAttachInterrupt(timer, &resetSystem, true);
- timerAlarmWrite(timer, DEINIT_TIMEOUT, false);
- timerAlarmEnable(timer);
-
- // disable unused components on first start
- if(0 == deep_sleep) {
- SDBGLN("Powering down BT and ADC...");
- esp_bt_controller_disable();
- adc_power_off();
- }
-
-
- // Light blue LED (on FireBeetle)
- pinMode(STATUS_LED_PIN, OUTPUT);
- digitalWrite(STATUS_LED_PIN, HIGH);
-
- // print current timestamp to serial (debugging)
- {
- time_t now;
- time(&now);
- SDBGF("Wakeup at %ld\n", now);
- }
-
- // Set up Accelerometer
- if (!accel.begin()) {
- SDBGLN("Beschleunigungssensor antwortet nicht.");
- } else {
- accel.setClickInterrupt(3, ACCEL_CLICK_THS);
- accel.setMovementInterrupt();
- }
-
- // Get Wakeup source
- esp_sleep_wakeup_cause_t wakeup_reason = esp_sleep_get_wakeup_cause();
- SDBG("Wakeup reason: ");
- switch(wakeup_reason) {
- // Valid
- case 0: SDBGLN("Reboot"); break;
- case ESP_SLEEP_WAKEUP_EXT0: SDBGLN("EXT0"); break;
- case ESP_SLEEP_WAKEUP_TIMER: SDBGLN("Timer"); break;
-
- // Invalid
- case ESP_SLEEP_WAKEUP_EXT1: SDBGLN("EXT1 (should not happen)"); break;
- case ESP_SLEEP_WAKEUP_TOUCHPAD: SDBGLN("Touchpad (should not happen)"); break;
- case ESP_SLEEP_WAKEUP_ULP: SDBGLN("ULP (should not happen)"); break;
- default : SDBGF("Unknown reason %d (should not happen)\n", wakeup_reason); break;
- }
-
- // Do we need an WLAN synchronization?
- bool update = (wakeup_reason == ESP_SLEEP_WAKEUP_TIMER) || (wakeup_reason == ESP_SLEEP_WAKEUP_UNDEFINED) || (timelog_entry > TIMELOG_MAX);
-
- // check tap
- uint8_t click = accel.getClick();
- if (click != 0 && (click & 0x30)){
- SDBGLN("Synchronisiere aufgrund von Klopfen");
- update = true;
- }
-
- // Timer wakeup
- time_t now;
- time(&now);
- if (now >= wakeup) {
- update = true;
- }
-
- // check side
- checkSide(update);
-
- // do update
- if (update){
- SDBGF("Sync #%d\n", ++sync_counter);
- sync();
-
- // New Timer Wakeup
- time(&now);
- wakeup = now + SYNC_INTERVAL;
-
- // safety - if wlan connection was slow, lets check current side again, maybe it has been flipped meanwhile
- checkSide();
- }
-
- // calculate next wakeup
- if (wakeup - now < 1) {
- wakeup = now + 1;
- }
- gotoDeepSleep((wakeup - now) * 1000000ULL);
-}
-
-void resetSystem() {
- ++bug_counter;
-
- SDBGLN("-=================-");
- SDBGLN("|~~~ BUG ~~~|");
- SDBGLN("-=================-");
-
- SDBGF("[BUG %d] Watchdog triggered; Resetting System\n", bug_counter);
-#ifdef SERIAL_DEBUG
- Serial.flush();
-#endif
- gotoDeepSleep(5 * 1000ULL * 1000ULL, /* force = */ true);
-}
-
-void loop() { /* This is never going to be called due to deep sleep. */ }
+/***********************************************
+ * For compatibility with arduino only. *
+ * Write your code to corresponding .cpp file. *
+ **********************************************/