dataflash_log_download [Digitale Elektronik und Technische Informatik]

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====== DataFlash Log Downloading Tests ======

As the plane is closed we cannot download the dataflash logs anymore by removing the SD-Card from its slot.

Therefore a wireless method need to be found to get the data from the pixracer.

If not other noted, the baudrate is set to 115200.

=== Method1: Download via MavEsp WIFI ===

  - Insert the ESP into the pixracer.
  - Download the latest Dailybuild from QGroundcontrol: https://docs.qgroundcontrol.com/en/releases/daily_builds.html
  - Download the latest firmware for mavesp: https://github.com/dogmaphobic/mavesp8266
  - Login into pixracer WIFI which is provided by the ESP
  - Open ''http://192.168.4.1/update'' and flash the downloaded firmware
  - Optinal: Set Params ''https://github.com/dogmaphobic/mavesp8266/blob/master/HTTP.md''
  - Optinal: Set WIFI Channel via ''http://192.168.4.1/setparameters?channel=1''  (Here Channel 1 - At HS Augsburg least occupied Channel)
  - Optinal: Restart ESP as only then the new params will be used

 
Test 14.2.2020 - MAVEsp in AP Mode

  - Qgroundcontrol Dailybuild 14.2.2020
  - Mavesp Firmware 1.2.2
  - Login into pixracer WIFI which is provided by the ESP
  - Open QGroundcontrol and download dataflash Log
  - => Speed about 15-20kB/sec
  - Estimated Time to Download One Flight: Pixracer creates 3.4 MB/Min => 204MB/h = 204MB/Flight => 204MB / 0,020MB/sec = 10200 Sec = 170 Min = ~3h

Test 15.2.2020 - MAVEsp in Station Mode

  - Login into pixracer WIFI which is provided by the ESP
  - Set MAVEsp to Client / Station Mode: Mode = 1 . Be sure to type in the correct AP Name and Password. I tested by giving static IP
  - Set Params via HTTP Interface: ''http://192.168.4.1/setparameters?mode=1&ssidsta=APNAME&pwdsta=PASSWORD&ipsta=192.168.8.44&gatewaysta=192.168.8.1&subnetsta=255.255.255.0&reboot=1''
  - Start QGroundcontrol
  - Connection should be established automatically
  - Download dataflash Log
  - Speed about 18kB/sec

=== Method2: Download via UART-MAVProxy to Raspberry ===

Idea is to download the dataflashlog via Serial Telemetry Link from the Pi from the Pixracer

  - Wire RX / TX with the PI 
  - Install MAVProxy @ PI : ''sudo pip3 install mavproxy''
  - Set Telemetry Speed (115200 / 921600) via QGroundcontrol
  - start pi<->pixracer connection : ''sudo mavproxy.py --master=/dev/ttyS0 --baudrate=921600''
  - get log list : ''log list''
  - download log: ''log download <logid> <filename>''

Test 15.2.2020
  - ''log download 1 1.bin''
  - => RTL> Finished downloading 1.bin (473553 bytes 48 seconds, 9.8 kbyte/sec 143 retries)

Test 20210529 CM4
  - ''mavproxy.py --master=/dev/ttyAMA0,1500000''
  - Baudrate 1500000
  - Finished downloading log1.bin (232633 bytes 10 seconds, 21.7 kbyte/sec 0 retries)

Test 20210617 Pi0:
  - ''mavproxy.py --master=/dev/ttyS0,115200 --default-modules log''
  - Baudrate 115200: Finished downloading log1.bin (232633 bytes 29 seconds, 7.9 kbyte/sec 0 retries)
  - Baudrate 500000: Finished downloading log1.bin (232633 bytes 17 seconds, 13.7 kbyte/sec 0 retries)
  - Baudrate 921600: Finished downloading log1.bin (232633 bytes 13 seconds, 16.8 kbyte/sec 0 retries)
  - Baudrate 1500000: Downloading log1.bin - 232560/232633 bytes 100.0% 10.1 kbyte/s (100 retries 57 missing)

Test 20220531 CM4:

**Baudrates**

**115200**
  * Unordered List ItemFinished downloading log1.bin (55289 bytes 6 seconds, 8.7 kbyte/sec 0 retries)


**500000**

  * Finished downloading log1.bin (55289 bytes 3 seconds, 16.3 kbyte/sec 0 retries)



**921600**
  - log download 1
  - 
  - Finished downloading log1.bin (55289 bytes 3 seconds, 16.1 kbyte/sec 0 retries)
  - Finished downloading log1.bin (55289 bytes 3 seconds, 16.2 kbyte/sec 0 retries)
  - Finished downloading log1.bin (55289 bytes 3 seconds, 15.8 kbyte/sec 0 retries)
  - Finished downloading log1.bin (55289 bytes 3 seconds, 16.1 kbyte/sec 0 retries)
  - Finished downloading log1.bin (55289 bytes 3 seconds, 16.5 kbyte/sec 0 retries)



**1500000**
  * Finished downloading log1.bin (55289 bytes 3 seconds, 16.9 kbyte/sec 0 retries)
  * Finished downloading log1.bin (55289 bytes 3 seconds, 17.0 kbyte/sec 0 retries)
  * Finished downloading log1.bin (55289 bytes 3 seconds, 16.9 kbyte/sec 0 retries)
  * Finished downloading log1.bin (55289 bytes 3 seconds, 17.0 kbyte/sec 0 retries)
  * 


=== Method3: Download via USB-MAVProxy to Pi ===

Test 27.5.2021: CM4/Pi4 
  - Finished downloading log3.bin (13292972 bytes 60 seconds, 219.2 kbyte/sec 0 retries)

Test 28.5.2021:  Pi Zero 

  - Added usb connector as described in [[https://www.instructables.com/Raspberry-Pi-Zero-OTG-Hack-Add-a-Fullsize-Connecto/|HERE]]
{{ ::signal-2021-05-28-170257.jpeg?400 |}}

''mavproxy.py --master=/dev/ttyACM0,115200''
  - loads all modules of mavproxy => 100% idle cpu 
  - Finished downloading log2.bin (462481 bytes 35 seconds, 13.1 kbyte/sec 0 retries)
  - Finished downloading log2.bin (462481 bytes 46 seconds, 10.0 kbyte/sec 0 retries)
  - Finished downloading log2.bin (462481 bytes 64 seconds, 7.1 kbyte/sec 0 retries)

''mavproxy.py --master=/dev/ttyACM0,115200 --default-modules log''
  - loads only log module of mavproxy => 60% idle cpu 
  - Finished downloading log1.bin (232633 bytes 8 seconds, 26.9 kbyte/sec 0 retries)
  - Finished downloading log1.bin (232633 bytes 8 seconds, 26.9 kbyte/sec 0 retries)
  - Finished downloading log2.bin (462481 bytes 17 seconds, 26.9 kbyte/sec 0 retries)

Test 20210529: Pixracer @ Laptop
''mavproxy.py --master=/dev/ttyACM0,1500000 --default-modules log''
  - Finished downloading log3.bin (13292972 bytes 50 seconds, 264.3 kbyte/sec 0 retries)
  - Finished downloading log3.bin (13292972 bytes 49 seconds, 270.3 kbyte/sec 0 retries)


Test 20210529: Pixracer @ CM4
''mavproxy.py --master=/dev/ttyACM0,1500000 --default-modules log''
  - Finished downloading log3.bin (13292972 bytes 53 seconds, 249.2 kbyte/sec 0 retries)
  - Finished downloading log3.bin (13292972 bytes 53 seconds, 249.3 kbyte/sec 0 retries)

=== Method4: Download via QGC ===

Test 28.5.2021: QGC @ Laptop
  - ~250 kbyte/sec