rp6conrad forum posts in last 60 days

rp6conrad
rp6conrad
384 posts
384 posts
1 Sep 2026 3:04pm
There is a new update on github : SW 605g. Lots of changes :
Several "GPS Nerd settings" added, as max nr of sats (too prevent lost points), min elevation sats.
Screen can be inverted in the config
500 m track measurement with Start and Finish in the config, added stat screens for 500m track
Several bugfixes
github.com/RP6conrad/ESP-GPS-Logger?tab=readme-ov-file

Greetings, Jan
### Changes SW 6.05g
* bugfix screen 6 / shut down screen
* Added maxSVS in config, to limit nr of sats in nav solution. This for "lost points" prevention
* GPS nerd settings button in configuration webpageto hide all detailed gps settings
* p1/p2 data type in json is now string, so all digits stay unchanged
* check for string type p1/p2, other wise panic when still double type !!!
* Auto track setting when p1/p2 is zero in the config : first 500m run with speed min 5 m/s after 600 m run distance
### Changes SW 6.05delta
* settings M10 added tot .txt file
* full power mode in the config
* Added setting M10 minimal elevation satellite above horizon, 5 - 25 degrees
* Stat-screen D 5-9 track speed, update Top_5()
* Stat-screen E Ranking Nautical mile screen
* Stat-screen F Ranking 100m screen
* track_speed Start -> finish now with exact doppler - distance
* added projected doppler speed to track speed (only in stat screen now)
* json buffer now 2048 bytes (was 1536)
* Screen orientation now in config, had to update GXDEM0213B74 lib, and bugfix for screen offset (added VISIBLE_WIDTH 122)
### Changes SW 6.05beta
* Added max nr of satellites in config (motion has a fix limit of 18)
* Added "track-speed" measurement between 2 gps points, start and finishline perpendicular to start / finish point
* Added stat-screen B with distance to start line, gps distance track, track-speed and doppler speed.
* Added speed-screen F with distance to start line and track seconds passed
* Best 5 track runs are added to *.txt file (track speed and doppler speed, but doppler is for 250m (track distance<350m) or 500m.
* Added SD-nand breakout files to github (easy eda format)
* Added 3D housing files to github (stl + dxf for lasercutting)
* GPST post 1h knots bugfix
rp6conrad
rp6conrad
384 posts
384 posts
16 Jul 2026 2:48am
If you boot a ESP-GPS with only 16 MB of flash, and no SD-card, you should have 12 MB free memory to store files. If not, and you only see 1 MB free memory, you probably flashed it the first time (over USB) with the wrong partition table.
If you see 12 MB free memory, the partition table is ok. But take care that you delete your files before the memory gets full, you could brick the device (no protection now in the SW for full memory...). There should be at least 2 MB free al time, to make sure all file handling is secured.
To prevent files copied to the "Archive" directory, set in the configuration archive_days to 0.
Greetings, Jan.
rp6conrad
rp6conrad
384 posts
384 posts
7 Jul 2026 3:35pm
Yesterday, I had a low wind session @ my homespot. I tested 4 PMMA-case ESP-GPS with next configurations :
1. Arm mount, BE182 partly covered, sats limited to 18 in the SW (motion setting)
2. Arm mount, BE182 free sight, sats limited to 18 in the SW (motion setting)
3. Boom mount, BE182 partly covered, unlimited sats (avg 26 sats)
4. Boom mount, BE182, partly covered, unlimited sats (avg 26 sats)
If you look at the HDOP numbers, nr 1 was worst. The other 3 were more or less the same. I am not sure why nr 1 was worst, maybe due to partly covered BE182, maybe because the hard limit of 18 sats. The 3 and 4 did perform the same as nr 1, but they received avg 26 sats. As walways, the speeds were higher with the arm mount units.
In my opinion, it does not make a huge difference if the Beitian is partly covered.

Greetings, Jan.














rp6conrad
rp6conrad
384 posts
384 posts
2 May 2021 12:52am
The first water test of my diy GPS is a succes. My goal was to make a simple low budget GPS logger with a ESP32 as brain. Minimal solderskills are needed, as just the GPS has to be soldered to the right pins. Total budget is around 40?. Some technical details :
ESP32 board with e-paper display (Lilygo TTGO T5, 15$)
Beitian BN220 / BN280 gps (ublox M8n engine), 10$
Lipo 2000 mAh, with protection, 10$
Sealed case, 5$
A log rate of 10 Hz is possible, format UBX NAVPVT.
On my first water test, I had 2 units mounted on each boom side. The actual speed and the actual run is directly visible while surfing. The BN280 is the blue plot, BN220 the red plot. Number of sats was 16 - 20, logged@2 Hz. Fot who is interested, I am willing to share the SW (arduino IDE). Next test, I will log@10 Hz.
Greetings, Jan.