====== Changelog ======

original source(([[https://tracker.blitzortung.org/firmware/CHANGELOG.txt|CHANGELOG.txt]]))

download folder of the [[https://tracker.blitzortung.org/firmware/|firmware for RED and BLUE]]

Changes in Firmware for Blitzortung.org RED/BLUE controller. Not all changes/fixes are listed here.

===== 9.x =====

==== 9.2 (2018-12-31) ====
[[https://tracker.blitzortung.org/firmware/Firmware_9.2_BLUE.bin|Firmware_9.2_BLUE.bin]]
[[https://tracker.blitzortung.org/firmware/dfu/Firmware_9.2_BLUE_9.2-0-ga99a486_20181231_1125_0c6ff3041150841c53f6b3d62611aa6c.dfu.zip|Firmware_9.2_BLUE_9.2-0-ga99a486_20181231_1125_0c6ff3041150841c53f6b3d62611aa6c.dfu.zip]]
[[https://tracker.blitzortung.org/firmware/Firmware_9.2_RED.bin|Firmware_9.2_RED.bin]]
[[https://tracker.blitzortung.org/firmware/dfu/Firmware_9.2_RED_9.2-0-ga99a486_20181231_1124_a184d3826b85691490bb67a4855d6423.dfu.zip|Firmware_9.2_RED_9.2-0-ga99a486_20181231_1124_a184d3826b85691490bb67a4855d6423.dfu.zip]]

  * new: added HTTP proxy option for remote control
  * new: rebooting via HTTP works now even when there's no memory left (..&action=do_reboot)
  * new: prepared for sending noise signals to server
  * new: debugging option for 1PPS counter
  * fix: lowered memory usage for remote control requests
  * due to space limitations, jquery and jqplot isn't included in firmware anymore and will be loaded from the web (RED)

==== 9.1 (2018-08-08) ====
[[https://tracker.blitzortung.org/firmware/Firmware_9.1_BLUE.bin|Firmware_9.1_BLUE.bin]]
[[https://tracker.blitzortung.org/firmware/dfu/Firmware_BLUE_9.1-0-gc42b5cd_20180808_2112_3f46ad5ffce2d1839c1a2b2237522dc4.dfu|Firmware_BLUE_9.1-0-gc42b5cd_20180808_2112_3f46ad5ffce2d1839c1a2b2237522dc4.dfu]]
[[https://tracker.blitzortung.org/firmware/Firmware_9.1_RED.bin|Firmware_9.1_RED.bin]]
[[https://tracker.blitzortung.org/firmware/dfu/Firmware_RED_9.1-0-gc42b5cd_20180808_2110_3c78df78fc1fb08614dcf3a245526fd6.dfu.zip|Firmware_RED_9.1-0-gc42b5cd_20180808_2110_3c78df78fc1fb08614dcf3a245526fd6.dfu.zip]]

  * send some more status information about each signal to server
  * fix: sending control requests too often
  * fix: out of memory when sending too much channels to signal plot
  * fix: showed too high PCB version
  * switched to GCC ARM Embedded 7 2018 q2 toolchain


==== 9.0 (2018-06-09) ====
[[https://tracker.blitzortung.org/firmware/Firmware_9.0_BLUE.bin|Firmware_9.0_BLUE.bin]]
[[https://tracker.blitzortung.org/firmware/dfu/Firmware_BLUE_9.0-0-g950d115_20180609_1946_060acc5eb5ff5b6bee8d018b7a32ee4f.dfu.zip|Firmware_BLUE_9.0-0-g950d115_20180609_1946_060acc5eb5ff5b6bee8d018b7a32ee4f.dfu.zip]]
[[https://tracker.blitzortung.org/firmware/Firmware_9.0_RED.bin|Firmware_9.0_RED.bin]]
[[https://tracker.blitzortung.org/firmware/dfu/Firmware_RED_9.0-0-g950d115_20180609_1940_b2bb4f9b6b4496957f1869440c8ffbea.dfu.zip|Firmware_RED_9.0-0-g950d115_20180609_1940_b2bb4f9b6b4496957f1869440c8ffbea.dfu.zip]]

  * new: support of PCB 19.5
  * new: basic support of UBX message format for u-blox MAX-M8W GNSS module
  * fix: messages on status page disappeared after one second  
  * fix: limit frequencies for hardware filter to ~300kHz
  * fix: init tracker settings after switching modes


==== 9.0b1 (2018-05-13) ====

BETA release!
[[https://tracker.blitzortung.org/firmware/beta/Firmware_9.0b1_BLUE.bin|Firmware_9.0b1_BLUE.bin]]
[[https://tracker.blitzortung.org/firmware/dfu/Firmware_BLUE_9.0b1-0-g9d05184_20180513_1108_b7146be9891208a6e85d0675ef1da8e6.dfu|Firmware_BLUE_9.0b1-0-g9d05184_20180513_1108_b7146be9891208a6e85d0675ef1da8e6.dfu]]
[[https://tracker.blitzortung.org/firmware/beta/Firmware_9.0b1_RED.bin|Firmware_9.0b1_RED.bin]]
[[https://tracker.blitzortung.org/firmware/dfu/Firmware_RED_9.0b1-0-g9d05184_20180513_1103_a6cef75ceff0e5f04221b23eaa1c7fdc.dfu|Firmware_RED_9.0b1-0-g9d05184_20180513_1103_a6cef75ceff0e5f04221b23eaa1c7fdc.dfu]]

  * new: DSP for checking/filtering signals (not functional yet)
  * new: added option to correct the offset in the graph
  * new: option to send debug log to a syslog server IP address (UDP) 
  * new: support of u-blox module MAX-M8W (GNSS/SBAS-settings and reset-commands not working yet)
  * improved(?) GNSS init process
  * removed debug code and improved data structures to reduce memory usage (RAM and firmware size)
  * lowered amount of data to reload status page
  * reduced stack size
  * fix: workaround for USB-VCOM not working on PCB 19.4 in case VBUS solder bridge is not closed (BLUE)
  * fix: don't update existing server IP with empty IP address "0.0.0.0"
  * fix: remote setting of sample rate not working
  * fix: sending UDP packets to multiple servers
  * fix: no automatic gain changes for RED amplifiers in certain situation 
  * fix: timer in debug log twice as fast than normal


===== 8.x =====

==== 8.4 (2018-01-17) ====
[[https://tracker.blitzortung.org/firmware/Firmware_8.4_BLUE.bin|Firmware_8.4_BLUE.bin]]
[[https://tracker.blitzortung.org/firmware/dfu/Firmware_BLUE_8.4-0-g3d5be78_20180117_1215_8605fea30a25e8068d7f8cbb93c48366.dfu|Firmware_BLUE_8.4-0-g3d5be78_20180117_1215_8605fea30a25e8068d7f8cbb93c48366.dfu]]
[[https://tracker.blitzortung.org/firmware/Firmware_8.4_RED.bin|Firmware_8.4_RED.bin]]
[[https://tracker.blitzortung.org/firmware/dfu/Firmware_RED_8.4-0-g3d5be78_20180117_1220_53ef817e095c943e8ee956beea289ecc.dfu|Firmware_RED_8.4-0-g3d5be78_20180117_1220_53ef817e095c943e8ee956beea289ecc.dfu]]

  * new: mouseover for satellites
  * fix: try to initialize amplifier more often after reboot (RED)


==== 8.4b5 (2018-01-07) ====

BETA release!
[[https://tracker.blitzortung.org/firmware/beta/Firmware_8.4b5_BLUE.bin|Firmware_8.4b5_BLUE.bin]]
[[https://tracker.blitzortung.org/firmware/beta/Firmware_8.4b5_RED.bin|Firmware_8.4b5_RED.bin]]

  * new: added cpu info in status json file
  * fix: also read GNSS data from GNGSA message


==== 8.4b4 (2018-01-06) ====

BETA release!
[[https://tracker.blitzortung.org/firmware/beta/Firmware_8.4b4_BLUE.bin|Firmware_8.4b4_BLUE.bin]]
[[https://tracker.blitzortung.org/firmware/beta/Firmware_8.4b4_RED.bin|Firmware_8.4b4_RED.bin]]

  * new: ability to send noise data to servers
  * new: logo animation (click to disable) ;-)
  * change: "00:00" isn't a valid reboot time any more (leave it disabled or use another random time)
  * improve: faster startup time
  * improve: amplitude filters with higher resolution (64 slots instead of 32)
  * fix: watchdog will be disabled in rare cases -> enable watchdog periodically (again)
  * fix: missing last byte in compressed UDP packets
  * fix: buzzer ticks on every consecutive signals instead of every 20th
  * fix: don't apply user gain level in auto-adaption (i.e. on startup), just use them as max. allowed gain
  * fix: DHCP was not always assigned when "link up" condition was missing on startup due to race condition
  * fix: DHCP was not assigned when same static IP was used as fallback
  * fix: DHCP timeout due to disabled system timer for some seconds during startup 
  * fix: voltage/PPS sampling resulted in unexpected behavior and hard faults due to developers stupidity
  * fix: don't display usless unknown GPS sentences
  * fix: auto refresh of status page did stop when controller ran out of memory 
  * several minor fixes (debug messages etc.)
  * switched to GCC ARM Embedded 7 2017 q4 toolchain


==== 8.4b3 (2017-12-06) ====

BETA release!
[[https://tracker.blitzortung.org/firmware/beta/Firmware_8.4b3_BLUE.bin|Firmware_8.4b3_BLUE.bin]]
[[https://tracker.blitzortung.org/firmware/beta/Firmware_8.4b3_RED.bin|Firmware_8.4b3_RED.bin]]

  * fix: static IP settings not working in last firmware


==== 8.4b2 (2017-12-06) ====

BETA release!
[[https://tracker.blitzortung.org/firmware/beta/Firmware_8.4b2_BLUE.bin|Firmware_8.4b2_BLUE.bin]]
[[https://tracker.blitzortung.org/firmware/beta/Firmware_8.4b2_RED.bin|Firmware_8.4b2_RED.bin]]

  * flash "Fault LED" when signal couldn't be sent due to network or GPS error
  * improved and cleaned up DHCP and network stuff
  * show GALILEO satellites with "G" in overview
  * also show "Unsaved settings..." dialog on "Status" and "Signals" page
  * enabled some DHCP debugging (BLUE only)


==== 8.4b1 (2017-12-03) ====

BETA release!
[[https://tracker.blitzortung.org/firmware/beta/Firmware_8.4b1_BLUE.bin|Firmware_8.4b1_BLUE.bin]]
[[https://tracker.blitzortung.org/firmware/dfu/old/Firmware_BLUE_8.4b1-0-gb80ae08_20171203_2232_90658fedb93d72a1e4654a06b482a760.dfu|Firmware_BLUE_8.4b1-0-gb80ae08_20171203_2232_90658fedb93d72a1e4654a06b482a760.dfu]]
[[https://tracker.blitzortung.org/firmware/beta/Firmware_8.4b1_RED.bin|Firmware_8.4b1_RED.bin]]
[[https://tracker.blitzortung.org/firmware/dfu/old/Firmware_RED_8.4b1-0-gb80ae08_20171203_2236_6a462296951d8410554ff4ecb0ae7bc1.dfu|Firmware_RED_8.4b1-0-gb80ae08_20171203_2236_6a462296951d8410554ff4ecb0ae7bc1.dfu]]

  * new: added GLONASS support (experimental!) [BLUE]
  * changed to new logo
  * fix: correct hiding of "save to flash and reboot message"
  * improved: USB <-> GPS module passthrough
  * upgraded lwip to version 2.0.x (needs testing!)


==== 8.3 (2017-11-14) ====
[[https://tracker.blitzortung.org/firmware/Firmware_8.3_BLUE.bin|Firmware_8.3_BLUE.bin]]
[[https://tracker.blitzortung.org/firmware/Firmware_8.3_RED.bin|Firmware_8.3_RED.bin]]

  * new: support of PCB 19.4
  * new: added experimental support for GALILEO (firmware update of GNSS-module needed) [BLUE]
  * new: GNSS data pass-through via USB (no fw update possible)  
  * added some more checks for AD converters
  * fix: integer overflow of "bytes sent" values
  * fix: applied patch on lwip which fixes DHCP issues (untested)
  * switched to GCC ARM Embedded 6 2017 q2 toolchain


==== 8.3b2 (2016-10-03) ====

BETA release!
[[https://tracker.blitzortung.org/firmware/beta/Firmware_8.3b2_BLUE.bin|Firmware_8.3b2_BLUE.bin]]
[[https://tracker.blitzortung.org/firmware/beta/Firmware_8.3b2_RED.bin|Firmware_8.3b2_RED.bin]]

  * slightly raised some network buffers
  * fix: crash when no crash occured before reset


==== 8.3b1 (2016-10-03) ====

BETA release!
[[https://tracker.blitzortung.org/firmware/beta/Firmware_8.3b1_BLUE.bin|Firmware_8.3b1_BLUE.bin]]
[[https://tracker.blitzortung.org/firmware/beta/Firmware_8.3b1_RED.bin|Firmware_8.3b1_RED.bin]]

<note>Firmware for BLUE has some additional debugging code in this version. A minor performace drop is possible. RED firmware is not affected due to size limitations.</note>

  * new: browse last signals in signal view
  * new: button for entering DFU mode over web-interface
  * new: option for silent reboot on hardfault
  * new: send call stack on errors [BLUE]
  * change: automatic reboot just before firmware flashing
  * fix: added correct text to button description in "guide" [BLUE]
  * fix: removed memory leak in signal view javascript
  * fix: repaired anti-ADC-watchdog-lock-watchdog from FW 8.2
  * fix: HTTP-client sometimes used wrong port number to connect
  * fix: wrong MD5 checksum of firmware when flashed external 
  * switched to GCC ARM Embedded 5.4 2016q3 toolchain


==== 8.2 (2016-09-28) ====
[[https://tracker.blitzortung.org/firmware/Firmware_8.2_BLUE.bin|Firmware_8.2_BLUE.bin]]
[[https://tracker.blitzortung.org/firmware/Firmware_8.2_RED.bin|Firmware_8.2_RED.bin]]

  * fix: reset ADC watchdog interrupt when watchdog-flag is set for two seconds 
  * fix: out of memory when sending to more than one region
  * fix: memory allocation errors related to network stack


==== 8.1 (2016-09-23) ====
[[https://tracker.blitzortung.org/firmware/Firmware_8.1_BLUE.bin|Firmware_8.1_BLUE.bin]]
[[https://tracker.blitzortung.org/firmware/dfu/old/Firmware_BLUE_8.1.dfu|Firmware_BLUE_8.1.dfu]]
[[https://tracker.blitzortung.org/firmware/Firmware_8.1_RED.bin|Firmware_8.1_RED.bin]]

  * fix: improvements for hard fault crashes and some more debug information
  * fix: workaround/test for possible crashes on some specific stations


==== 8.1b1 (2016-08-29) ====

BETA release!
[[https://tracker.blitzortung.org/firmware/beta/Firmware_8.1b1_BLUE.bin|Firmware_8.1b1_BLUE.bin]]
[[https://tracker.blitzortung.org/firmware/beta/Firmware_8.1b1_RED.bin|Firmware_8.1b1_RED.bin]]

  * fix: restart ADC-watchdog after offset refresh


==== 8.0 (2016-08-24) ====
[[https://tracker.blitzortung.org/firmware/Firmware_8.0_BLUE.bin|Firmware_8.0_BLUE.bin]]
[[https://tracker.blitzortung.org/firmware/Firmware_8.0_RED.bin|Firmware_8.0_RED.bin]]

  * support for PCB 19.3
  * additional remote debug information in specific hard fault situations
  * refresh offset error more often 
  * fix: ignoring GPS messages from QZSS satellite
  * fix: port number was ignored for http-requests
  * fix: firmware upload under linux failed due to timeouts
  * fix: use helvetia as fallback for arial on web-interface
  * fix: hide analogue user input when not available [BLUE]
  * fix: sometimes no restart or crash after firmware update


==== 8.0b5 (2016-06-08) ====

BETA release!
[[https://tracker.blitzortung.org/firmware/beta/Firmware_8.0b5_BLUE.bin|Firmware_8.0b5_BLUE.bin]]
[[https://tracker.blitzortung.org/firmware/beta/Firmware_8.0b5_RED.bin|Firmware_8.0b5_RED.bin]]

  * filter settings visible when solder bridge J0 closed [BLUE]
  * description for input selection instead of input numbers [BLUE]
  * sending information about inputs and filters to computing server [BLUE]
  * minor changes in server urls for remote config
  * lowered max opened and listening tcp connection
  * factory settings/debug mode with BOOT1 button: press and hold for 2s/10s just after reset [BLUE]
  * fix: raised stack memory size and added collision check
  * fix: network LED stayed off after blinking, even when status is good [BLUE]
  * fix (maybe): threshold/signal detection stopped after some when time in manual mode w/o noise adaption 
  * fix: minor issue that click on Firmware Update button had no effect
  * switched to GCC ARM Embedded 5.3 2016q1 toolchain


==== 8.0b4 (2016-04-05) ====

BETA release!
[[https://tracker.blitzortung.org/firmware/beta/Firmware_8.0b4_BLUE.bin|Firmware_8.0b4_BLUE.bin]]

  * re-added debug output via USB connector [BLUE]
  * blue LED now blinks every second to show good GPS [BLUE]
  * static gain information of onboard amps modified (not the final value) [BLUE]
  * fix: no sampling after startup in case all thresholds are default values (120mV) [BLUE]


==== 8.0b3 (2016-04-03) ====

BETA release!
[[https://tracker.blitzortung.org/firmware/beta/Firmware_8.0b3_BLUE.bin|Firmware_8.0b3_BLUE.bin]]
[[https://tracker.blitzortung.org/firmware/beta/Firmware_8.0b3_RED.bin|Firmware_8.0b3_RED.bin]]

  * final changes regarding PCB 19.1 [BLUE]
  * try to test whether on-board amplifier is "connected" by raising gains to maximum [BLUE/dev]
  * less CPU usage when playing signals through buzzer
  * not so much beeping on GPS error
  * fix: disabling LEDs by LCD sleep resulted in broken LCD and amplifier1 communication [RED] or other disabled pins [BLUE/dev]
  * fix: after firmware flash update procedure, the reset was broken
  * fix: infinitife loop in rare cases due to non-initialized debug UART DMA
  * fix: button has to be released after reset to factory settings to prevent too much writes to flash on boards without button
  * fix: display stays dark with factory settings [RED]
  * fix: network performance problems with on board MAC due to DMA buffer underflow handling [dev]

Not fixed yet: Loosing amplifiers (RED only so far) and sudden reboots. 


==== 8.0b2 (2016-02-14) ====

BETA release!
[[https://tracker.blitzortung.org/firmware/beta/Firmware_8.0b2_RED.bin|Firmware_8.0b2_RED.bin]]

  * added basic signal wave generator for testing amplifier [BLUE] 
  * improved sampling of external voltages/1pps and added more channel(s)
  * show only usable channels on amplifier to buzzer output
  * no more automatic reboot at 00:00 by default
  * added possibility to completely disable amplifier channel
  * changed behaviour of LEDs [BLUE]
  * enabled button [BLUE/dev]
  * added more channels colors to the LCD display [dev]
  * manual change of link speed (not working yet) [dev]
  * use interrupt instead of polling for Ethernet [dev]
  * fix: don't show username to guests
  * fix: sometimes corrupted data due to encoding
  * fix: transmitted non-encoded data with wrong channel number
  * fix: calculated sample rate had minor deviations
  * fix: amplifier sometimes doesn't get recognized after reconnect 
  * fix: static IPs not working / sometimes crash when releasing DHCP
  * fix: some memory allocation bugs
  * fix: wrong ADC <-> amplifier channel assignment / restart ADC in case of failure
  * fix: handle ADC overrun condition
  * switched to GCC ARM Embedded 5.2 2015q4 toolchain (-> smaller firmware size)
  
--> reached over 40000 lines of own code - aaargh... :-/


==== 8.0b1 (2016-01-24) ====

BETA release!
[[https://tracker.blitzortung.org/firmware/beta/Firmware_8.0b1_RED.bin|Firmware_8.0b1_RED.bin]]

<note>Due to minor changes in the settings structure, some (or all) settings have been set to defaults.
Please check your configuration!</note>

<note>System RED and BLUE share the same code base. If there are specific changes for just one
system, then it will be noted in the changelog entry.</note>

  * new: added support of BLUE final and development PCBs, which includes:
  - MEDIATEK MT3333 GPS chipset
  - gain and input changes of op amps through SPI
  - clock output for low pass filter ICs
  - more LEDs
  - STM32F42x CPU-Line [dev]
  - Ethernet through integrated MAC [dev]
  - ILI9341 TFT display [dev]
  - Reading touch screen values through STM32 ADCs [dev]
  * new: direct adjusting sampling frequency through timer
  * new: compression of UDP packets (lzfx)
  * new: delta encoding of channel 
  * new: non-lossless encoding of channel data by cutting out noise
  * new favicon depending on system
  * fix: uploading firmware fails occacionally
  * improvement: lots of general changes "under the hood"
  * improvement: minor style changes in the signal graph
  * lots of bugfixes


===== 7.x =====

==== 7.4 (2014-08-17) ====
[[https://tracker.blitzortung.org/firmware/Firmware_7.4_RED.bin|Firmware_7.4_RED.bin]]

  * minified css/js files
  * fix: IE gets confused by .gz file ending --> use normal file ending


==== 7.3 (2014-08-16) ====
[[https://tracker.blitzortung.org/firmware/Firmware_7.3_RED.bin|Firmware_7.3_RED.bin]]

  * added information about current mode and some color to the status page


==== 7.3b1 (2014-08-09) ====

BETA release!
[[https://tracker.blitzortung.org/firmware/beta/Firmware_7.3b1_RED.bin|Firmware_7.3b1_RED.bin]]

  * GPS: added availability value in web interface
  * NET: added MTU config option
  * change outgoing UDP port every 5 minutes
  * changed Google Maps link to ".com"
  * fix: prevent sending accidentaly triggered signals 
  * fix: small bug in action numbering
  * fix: lower browser memory usage for status page


==== 7.2 (2014-07-13) ====
[[https://tracker.blitzortung.org/firmware/Firmware_7.2_RED.bin|Firmware_7.2_RED.bin]]

  * TOA-ALERTS: general improvements
  * fix: problem with remote control of filter


==== 7.1 (2014-07-04) ====
[[https://tracker.blitzortung.org/firmware/Firmware_7.1_RED.bin|Firmware_7.1_RED.bin]]

  * TOA-ALERTS: general improvements
  * fix: memory leak in action URL call


==== 7.0 (2014-06-29) ====
[[https://tracker.blitzortung.org/firmware/Firmware_7.0_RED.bin|Firmware_7.0_RED.bin]]

  * show hint when amp 12 is on input 2 or amp 13 is on input 1
  * AS3935: minor fixes, automatic calibraton checks
  * fix: filter and adaption disable option per channel couldn't be disabled 
  * fix: possible memory leak in actions
  * fix: remote control messages


==== 7.0b5 (2014-05-18) ====

BETA release!
[[https://tracker.blitzortung.org/firmware/beta/Firmware_7.0b5_RED.bin|Firmware_7.0b5_RED.bin]]

  * fix: auto gain adjustment sometimes stalled
  * AS3935: several minor changes in error handling


==== 7.0b4 (2014-05-11) ====

BETA release!
[[https://tracker.blitzortung.org/firmware/beta/Firmware_7.0b4_RED.bin|Firmware_7.0b4_RED.bin]]

  * AS3935: raised IRQ level
  * improvments regarding remote control


==== 7.0b3 (2014-04-23) ====

BETA release!
[[https://tracker.blitzortung.org/firmware/beta/Firmware_7.0b3_RED.bin|Firmware_7.0b3_RED.bin]]

  * NEW: sampling of 5V power supply with rate of 8.5MSps
  * raised thresholds for auto amplitude filters a lot to prevent loosing too much signals
  * fix: no more mysterious gain changes (introduced in 7.0b1) 
  * fix: raised max. length of action URL again


==== 7.0b2 (2014-04-20) ====

BETA release!
[[https://tracker.blitzortung.org/firmware/beta/Firmware_7.0b2_RED.bin|Firmware_7.0b2_RED.bin]]

  * added filter debug checkbox
  * show filters for each channel in signal view
  * reset network hardware if remote config connection fails too often
  * fix: urlencode strings in user URLs
  * fix: load user gains/threshold on disabling auto adapt feature


==== 7.0b1 (2014-04-18) ====

BETA release!
[[https://tracker.blitzortung.org/firmware/beta/Firmware_7.0b1_RED.bin|Firmware_7.0b1_RED.bin]]

  * NEW: Filter by occurence of max. amplitudes in signals
  * NEW: LEDs can be switched off when LCD dimmed
  * improved support for new E-field amplifier
  * improvements in some other filters
  * noise adaption can be disabled for single channels
  * some improvents in noise adaption
  * force lower gain, if to high/low voltage (noise) affects ADC accuracy
  * support manufacturer GNS as GPS device
  * fix: GPS data sync bug
  * fix: raised max. length of URL 
  * fix: noise adaption stuck in gain 2*2
  * fix: minor LCD distortions
  * switched to GCC ARM Embedded 4.8 2014q1 toolchain


===== 6.x =====

==== 6.8 (2014-03-13) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_6.8_RED.bin|Firmware_6.8_RED.bin]]

  * AS3935: added URL parameters: strokes_all, disturbers_all, events
  * minor changes in communication with amplifier
  * fix: memory leak when too much HTTP ressources needed
  * fix: enabling potentiometer through LCD working again


==== 6.7 (2014-03-02) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_6.7_RED.bin|Firmware_6.7_RED.bin]]

  * WEB: responsive design for smartphones (beta!)
  * WEB: added station id in head - click to show it in the title
  * removed antenna selection and information
  * raised some network resources and lowered memory consumption
  * fix: connection issues with HTTP control in combination with some routers/firewalls (thx to Don)
  * fix: noise adaptation not working when threshold is zero (in automatic mode)
  * fix: plot and satellite not showing just after firmware update
  * fix: clarified the "Pending..." message after firmware upload and auto refresh of the page
  * fix: no more log out after firmware upload when auth is enabled


==== 6.6 (2014-02-20) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_6.6_RED.bin|Firmware_6.6_RED.bin]]

  * WEB: show link to changelog when new FW available
  * WEB: show NTP request count
  * WEB: some style changes
  * WEB: seconds converted to days/hours/minutes
  * no-connection reboot/timeout set to 2 hours 
  * fix: web alert sounds
  * fix: memory curruption on boot caused by alert settings
  * fix: stack curruption due to AS3935 actions (!)
  * fix: ADC hangs on re-init


==== 6.5 (2014-02-16) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_6.5_RED.bin|Firmware_6.5_RED.bin]]

<note>Firmware update via web-interface had some strange bugs in 6.3/6.4 ! 
Chance is high, that it won't work. If upload fails (you won't see a warning message), then
you must save your settings again. Otherwise they are lost on the next reboot!</note>

  * NEW: StratumOne NTP time-server (not as accurate as similar products due to hardware restrictions) 
  * ALERTS: settings always visible, even when server is not capable for it
  * AS3935: Tune capacitor value can be manually adjusted
  * ACTIONS: more parameters added to the URL depending on calling peripheral
  * ACTIONS: can be called by URL now 
  * ACTIONS: added status on main page 
  * WEB/ACTIONS: alert sounds through browser on action (toggle by clicking on name in status, saved in a cookie)
  * WEB: changed method of loading javascripts (one big file instead of several small ones)
  * WEB: menu instead of dropdown-box on settings page
  * fix: no more gain changes by noise adaptation when amplifier potentiometer is enabled
  * fix: hardened web-based firmware update, so that it retries on flash write error (and does not stop as it was before)


==== 6.4 (2014-01-22) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_6.4_RED.bin|Firmware_6.4_RED.bin]]

  * new map of GPS satellite constellation
  * fix for fix for problems with negative smoothed GPS coordinates after boot (sorry again)
  * other minor fixes


==== 6.3 (2014-01-20) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_6.3_RED.bin|Firmware_6.3_RED.bin]]

  * some changes on auto noise adaptation
  * fix: web-interface firmware update repaired and implemented some function to warn developer when not working ;-)
  * fix: problems with negative smoothed GPS coordinates after boot (sorry region 2+3)


==== 6.2 (2014-01-19) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_6.2_RED.bin|Firmware_6.2_RED.bin]]

  * improved auto adapt to noise level adjustment (shared channel support, remote configurable)
  * I2C: frequency can be changed
  * fix: don't display "STR" when no alerts are enabled and AS3935 is not present
  * fix: auto-config stays in interference mode when noise level was too high 
  * fix: minor signal display issues


==== 6.1 (2014-01-12) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_6.1_RED.bin|Firmware_6.1_RED.bin]]

  * NEW: automatic gain/threshold <-> noise level adjustment (very beta!)
  * WEB: minor improvments on signal view
  * WEB: message when firmware update check fails
  * LOG: Enable USB-Virtual-COM-Port when pressing blue button before booting 
  * SYS: faster boot, but show boot screen for some seconds
  * AS3935: don't create new event when no lightning has been detected
  * fix: on multiple alert events, call action with highest priority only (for TOA and AS3935)
  * fix: bug, which caused too high CPU usage
  * fix: wait some time before reset GPS smoothing
  * fix: memory leak in webserver


==== 6.0 (2014-01-05) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_6.0_RED.bin|Firmware_6.0_RED.bin]]

<note>Due to minor changes in the settings structure, some settings have been set to defaults.
Please check your configuration or reset them to defaults.</note>


=== Major changes and improvements ===

  * NEW: ACTIONS and lightning ALERTS - individual combinations of TOA-lightning, AS3935, I/Os and buzzer sounds :-)
  * WEB: open parts of webpages in a separate popup window
  * WEB: live plot with received/sent signals on status page
  * TRACKER: filter out spikes caused by digital signals the controller hardware (lower thresholds possible)
  * TRACKER: record noise level of 10 times per second (can be displayed in signal view)
  * TRACKER: prevent overlap of two consecutive signals (up to 50% overlapping before)
  * ADC: Alternate channel mapping when two amps connected: use same threshold for whole amplifier instead of same channel of both amplifiers 
  * LOG: Option to use micro-USB-jack as virtual COM-port to see debug output (very beta!)
  * AS3935: nicer display of events in web-interface


=== Minor changes, improvments and fixes ===

  * WEB: signal rate in title
  * WEB: using dynamic memory for webpage contents
  * WEB: slightly darker fonts on the web-interface
  * WEB: improved data transmission signal view: can now be used on more than one device at the same time
  * WEB: thresholds in graph
  * AMP: Option for a channel, so that it won't be transmitted to servers (for experiments) 
  * SYS: Option to reboot once per day at given time
  * SYS: Option for CPU sleep mode, which saves up to 40mA@3V (CPU usage calculation doesn't work with it)
  * SYS: Option for voltage check toggle, for those who have problems here
  * SYS: Option for flash prefetch toggle, which eliminating some (very low) noise in ADCs 
  * SYS: Check whether uploaded FW is equal to running firmware
  * LCD: Option to disable LCD page looping: page will stay on user selected one (and return there after an event)
  * BUZZER: different way of playing sounds (unfortunately deep beep is not as loud as before)
  * LOG: introduced console-commands: r=reboot, m=free dynamic mem, s=show memory content
  * LOG: logging debug output via UDP (like good old tracker XT; enabled by server)
  * GPS: smooth values stay after reset (using backup SRAM)
  * GPS: faster availability of GPS after reboot
  * AS3935: sending events to server via remote config
  * AS3935: auto noise floor adjustemnt
  * USER-I/O: added high-impedance output option
  * NET: (maybe bugfix) reset network when no ingoing packet for some time
  * fix: don't touch USER-I/O when not enabled (may solve issue with buzzer)
  * fix: several bugs on AS3935 and USER-I/O functions
  * switched to GCC ARM Embedded 4.8 2013q4 toolchain (-> smaller binary on the same optimization level)

 
===== 5.x =====

==== 5.0 (2013-12-01) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_5.0_RED.bin|Firmware_5.0_RED.bin]]

  * NEW: 1PPS-sampling with 8.4MSps to check timings and 1PPS quality
  * NEW: Live status display in web-interface
  * NEW: Possibility to connect AS3935 lightning sensor via I2C (experts only)
  * NEW: I/Os for own purposes (experts only !!!)
  * minor changes in networking
  * supports PCB-Id 2 (10.4)
  * minor layout changes
  * fix: reset ENC28J60 on error and no more ENC28J60 interrupt on error (fixes high CPU usage)
  * fix: signal page timeout detection on refresh
  * fix: some values on http remote config weren't updated


===== 4.x =====

==== 4.5 (2013-10-06) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_4.5_RED.bin|Firmware_4.5_RED.bin]]

  * reboot when no http-connection or no valid information got over remote config
  * improved GPS smoothing behavior and lowered tolerance
  * LCD can be rotated by 180 degrees
  * fix: memory not freed when control connection could not be established
  * fix: some more memory leaks closed
  * fix: no more init loops for non Mediatek GPS modules 
  * fix: DHCP renew works now
  * fix: blue LED forgets blinking on some 1PPS pulses
  * updated to GCC ARM Embedded 4.7 2013q3 toolchain


==== 4.4 (2013-09-15) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_4.4_RED.bin|Firmware_4.4_RED.bin]]

  * buzzer signal output settings can be saved to flash now
  * GPS individual command text field
  * GPS PA6H init enables AIC and disables EASY (see PA6H datasheet for more info)
  * signal view: settings saved in cookies
  * fix: don't show valid uploaded firmware when it's no more available in flash


==== 4.3 (2013-09-12) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_4.3_RED.bin|Firmware_4.3_RED.bin]]

  * volume changes for signal pass-through
  * fix: controller-id scrambled on LCD on station setup
  * fix: faster update of signal times in LCD


==== 4.2 (2013-09-12) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_4.2_RED.bin|Firmware_4.2_RED.bin]]

  * fix: firmware upload works now in Chrome 
  * fix: GPS improvements, EM406 should work now


==== 4.1 (2013-09-10) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_4.1_RED.bin|Firmware_4.1_RED.bin]]

  * Amplifier -> Buzzer output improved! Hear stroke discharges during normal operation :-)
  * CPU-Load estimation
  * Show save-button when unsaved settings exist 
  * LCD boot image
  * added a small guide in under "About"
  * several small improvements and bugfixes


==== 4.0 (2013-09-03) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_4.0_RED.bin|Firmware_4.0_RED.bin]]

  * NEW: Firmware-Update with browser
  * NEW: LCD-Driver by Roland (some fine-tuning needed)
  * NEW: filter signals on too high amplitudes (currently only via remote config)
  * show info when settings are not saved
  * show warning when javascript disabled
  * check auth also for debug log and signal data requests
  * fix: DHCP retry when failed
  * fix: could not save settings on first start

<note>New settings storage position. Settings will be reset to default values after update!</note>


===== 3.x =====

==== 3.3 (2013-08-26) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_3.3_RED.bin|Firmware_3.3_RED.bin]]

  * reboot after 2 hours when not getting any connection 
  * fix: could not save LCD contrast/backlight
  * fix: smoothing wrong GPS values when running >1day


==== 3.2 (2013-08-23) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_3.2_RED.bin|Firmware_3.2_RED.bin]]

  * averaging and beep on signal page
  * fix: live signal stopped working after some seconds on non-Firefox browsers
  * fix: DHCP and Network timeout beavior 
  * fix: Potentiometer setting not working
  * fix: Wrong samplerate in graph
  * fix: Antenna not shown to guest


==== 3.1 (2013-08-18) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_3.1_RED.bin|Firmware_3.1_RED.bin]]

  * fix: LCD not working with factory settings
  * fix: Logout on maximize
  * fix: wrong reset value was sent


==== 3.0 (2013-08-18) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_3.0_RED.bin|Firmware_3.0_RED.bin]]

  * NEW: more info and options on the signal page
  * NEW: live message log window (see tools)
  * added header for IE10 (press Alt+S if it's still not working)
  * fixed backlight=0% could not be saved
  * fixed (maybe) some hard fault conditions
  * fixed sudden disconnect on changing network settings


===== 2.x =====

==== 2.5 (2013-08-05) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_2.5_RED.bin|Firmware_2.5_RED.bin]]

  * sending program counter to server after hardfault reset
  * LCD brightness 100% on reset
  * fixed buffer overflow on parsing antenna string from server


==== 2.4 (2013-08-04) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_2.4_RED.bin|Firmware_2.4_RED.bin]]

  * check position accuracy on smoothing
  * fixed wrong visibility of gain settings


==== 2.3 (2013-08-03) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_2.3_RED.bin|Firmware_2.3_RED.bin]]

  * added debug output on hardfault (serial+LCD)
  * enable antenna status for PA6H with newer firmware 
  * signal page works now with resolution != 12bit
  * disable LCD backlight PWM on 100% brightness
  * Change amplifier LEDs remotely 
  * fixed crash in http client
  * fixed crash on wrong pcb-id
  * fixed threshold value display


==== 2.2 (2013-07-27) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_2.2_RED.bin|Firmware_2.2_RED.bin]]

  * added expire header for IE
  * added warm start tool for GPS
  * added trigger statistics for channels
  * GPS startup timeout increased to 300s
  * GPS firmware requests improved + support for SiRF (untested)
  * possibility to add small help buttins on the web interface 
  * even more interference mode improvements
  * fixed crash/reboot on high signal rate (network stall)
  * fixed LED bootup sequence indicator (for debug purposes)
  * fixed missing new line in remote request
  * fixed LCD refresh
  * fixed broken station control POST request


==== 2.1 (2013-07-23) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_2.1_RED.bin|Firmware_2.1_RED.bin]]

  * Better handling of interference mode: instead of switching on-off-on-off... it stays in interference mode for a while
  * Adjust buzzer beep on interference mode delay
  * Webserver port can be changed
  * info about station-id/user-id on LCD
  * GPS tools for your module
  * GPS position smoothing
  * fixed some remote-control bugs
  * fixed signal view not updating in IE


==== 2.0 (2013-07-14) ====
[[https://tracker.blitzortung.org/firmware/old/Firmware_2.0_RED.bin|Firmware_2.0_RED.bin]]

  * Initial release for all participants