Comments (5)
lyusupov
commented on July 17, 2024
Due to hardware restrictions I had to use SoftwareSerial to pick data from ublox.
I suspect that SwSerial is affected by external activity such as Wi-Fi traffic.
My current choice is to limit NMEA sentences to a minimum - GxRMC and GxGGA only.
I've used "U-center" to get rid of other messages (as well as to set up "Aircraft-2g" kinematic model).
I estimate that loss of NMEA input to about not more 10%. Which is acceptable for this moment.
from softrf.
biturbo
commented on July 17, 2024
Would it not be better to use Serial1 (GPIO2/D4) as the TX for BTRX and the Serial (GPIO3/RX) for GPSTX so you would not use SoftwareSerial, just an idea.
from softrf.
lyusupov
commented on July 17, 2024
This is the ESP8266 GPIO pins allocation map that I've taken into account:
With NodeMCU I am unable to manage GPIO3 for hardware serial input because this pin is connected to CP2102 through 470 Ohm resistor. See this schematic for details: https://github.com/nodemcu/nodemcu-devkit-v1.0/blob/master/NODEMCU_DEVKIT_V1.0.PDF
I saw no information on how to put CP2102 into off mode or any other mode which would leave this Tx line into 'free' state. When it is not free - 470 Ohm is too heavy load for GNSS module to override.
If you are suffering a lot from this "garbage" you may consider to solder yourself ESP-12 onto a PCB which would have same form factor and pinout as NodeMCU. Alternatively, you may re-solder 470 Ohm SMD resistor with 10K Ohm and detach GNSS module each time you use CP2102 for firmware update.
But I earlier decided to leave this "garbage" issue "AS IS" and consider it as a known compromise.
I will prefer to reduce the "garbage" with a software counter-measures. As an example, one easy (but ugly) solution is to filter out GNSS messages with wrong checksum.
from softrf.
lyusupov
commented on July 17, 2024
An illustration that reduction of NMEA input to a minimum does help.
Ublox "factory" settings:
$GPGLL,,,,,155832.00,V,N*42`
$GPRMC,15583& ▒b
▒5600.54310,N,822.22946,E,155833.00,A,A*60
,10,215,20,17,47,063,*7A
$GPGSV,5,3,17,19,64,087,,22,05,025,,24,68,240,29,25,07,271,32*7E
$GPGSV,5,4,17,28,06,087,,32,19,323,,37,24,200,27,39,25,196,27*75
$GPGSV,5,5,17,42,,,▒▒▒5
$GPGLL,,,,,155834.00,V,N*44
$GPRMC,155835.00,V,,,,,,,280217,,,N*7C
$GPVTG,,,,,,,,,N*30
$GPGGA,155835.00,,,,,0,03,5.63,,,,,,*5A
$GPGSA,A,1,15,25,12,,,,,,,,,,5.72,5.63,1.00*01
$GPGSV,5,1,17,01,05,018,,02,7C
$GPGLL,,,,,155835.00,V,N*45
0,215,20,17,47,063,*74
$GPGSV,5,3,17,19,64,087,,22,05,025,,24,68,240,31,25,07,271,33*76
$GPGSV,5,4,17,28,06,087,,32,19,323,,37,24,200,27,39,25,196,27*75
$GPGSV,5,5,17,42,,,27*7C
$GPGLL,,,,,155836.00,V,N*46
$GPGLL,5600.54121,N,03822.22841,E,155837.00)▒A*62
$GPRMC,155838.00,A,5600.54078,N,03822.22691,E,1.194,,280217,,,A*79
$GPVTG,,T,,M,1.194,N,2.211,K,A*2E
$GPGGA,155838.00,5600.54078,N,03822.22691,E,1,03,5.62,187.5,M,12.5,M,,*59
$GPGSA,A,2,15,25,12,,,,,,,,,,5.71,5$PFLAU,1,1,2,1,1,-64,2,251,778*43
$PFLAA,1,341,-699,251,2,FCA567,,,,,1*2F
3,27,37,24,200,29,39,25,196,29*79
$GPGLL,5600.54078,N,03822.22691,E,155838.00,A,A*63
41,27,15,10,215,21*7C
$GPGSV,5,3,17,17,47,063,16,19,64,087,,22,05,025,18,24,68,240,32*7F
$GPGSV,5,4,17,25,07,271,33,28,06,087,,32,19,323,,37,24,200,28*78
$GPGSV,5,5,17,39,25,196,28*46
$GPGLL,,,,,155839.00,V,N*49
$PFLAU,1,1,2,1,1,-66,2,251,831*43
$PFLAA,1,338,-759,251,2,FCA567,,,,,1*2C
,26,15,10,215,20*7C
$GPGSV,5,3,17,17,47,063,12,19,64,087,,22,05,025,,24,68,240,31*71
$G▒▒eŪb▒b▒▒b▒▒b▒▒b▒▒▒b▒▒b▒▒b▒▒b▒ºbb▒▒b▒▒b▒▒▒bb▒▒b▒▒b▒▒▒b▒▒R▒▒j
$GPGSV,5,5,17,39,25,196,27*49
$GPGLL,,,,,155840.00,V,N*47
$GPRMC,155841.00,V,,,,,,,280217,,,N*7F
$GPVTG,,,,,,,,,N*30
$GPGGA,155841.00,,,,,0,00,99.99,,,,,,*6A
$GPGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*30
$GPGSV,4,1,16,01,05,018,,02,09,160,,03,02,045,22,04,,,,,,,,280217,,,N*7C
!▒u025,,24,68,240,31*72
$GPGSV,4,4,16,25,07,271,32,28,06,087,,32,19,323,,39,25,196,27*75
$GPGLL,,,,,155842.00,V,N*45
,155843.00,A,A*66
,155844.00,A,A*60
2,02,09,160,,03,02,045,,04,,,25*49
$GPGSV,4,2,15,06,28,127,,12,47,270,40,14,05,341,25,15,10,215,20*72
$GPGSV,4,3,15,17,47,063,,19,64,087,5600.53860,N,03822.22878,E,1,04,11.48,189.6,M,12.5,M,,*68
$G▒▒▒,07,271,31,28,06,087,18,32,19,323,27*4F
$GPGLL,5600.53860,N,03822.22878,E,155846.00,A,A*65
00,E,155847.00,A,A*6D
GxGSV, GxVTG, GxGLL GxGSA are disabled. ( TinyGPS+ ignores them anyway ):
$GPRMC,174308.00,A,5600.56151,N,03822.26892,E,1.357,,280217,,,A*7E
$GPGGA,174308.00,5600.56151,N,03822.26892,E,1,04,4.73,151.0,M,12.5,M,,*5B
$PFLAU,1,1,2,1,1,-61,2,287,1074*77
$PFLAA,1,520,-939,287,2,FCA567,,,,,1*20
$GPRMC,174309.00,A,5600.56125,N,03822.26864,E,1.804,,280217,,,A*78
$GPGGA,174309.00,5600.56125,N,03822.26864,E,1,04,4.73,150.8,M,12.5,M,,*59
$GPRMC,174310.00,A,5600.56107,N,03822.26918,E,1.552,,280217,,,A*74
$GPGGA,174310.00,5600.56107,N,03822.26918,E,1,04,4.73,149.8,M,12.5,M,,*53
$PFLAU,1,1,2,1,1,-63,2,289,1036*7D
$PFLAA,1,470,-923,289,2,FCA567,,,,,1*21
$GPRMC,174311.00,A,5600.56106,N,03822.26912,E,1.231,,280217,,,A*7C
$GPGGA,174311.00,5600.56106,N,03822.26912,E,1,04,4.73,150.3,M,12.5,M,,*5A
$GPRMC,174312.00,A,5600.56097,N,03822.26857,E,0.800,,280217,,,A*7F
$GPGGA,174312.00,5600.56097,N,03822.26857,E,1,04,4.72,150.4,M,12.5,M,,*56
$PFLAU,1,1,2,1,1,-63,2,288,1035*7F
$PFLAA,1,470,-922,288,2,FCA567,,,,,1*21
$GPRMC,174313.00,A,5600.56029,N,03822.26670,E,0.986,,280217,,,A*7F
$GPGGA,174313.00,5600.56029,N,03822.26670,E,1,04,4.72,152.0,M,12.5,M,,*5F
$PFLAU,1,1,2,1,1,-66,2,286,1019*7A
$PFLAA,1,414,-931,286,2,FCA567,,,,,1*2F
$GPRMC,174314.00,A,5600.55992,N,03822.26567,E,1.653,,280217,,,A*71
$GPGGA,174314.00,5600.55992,N,03822.26567,E,1,04,4.72,153.0,M,12.5,M,,*56
$GPRMC,174315.00,A,5600.5597$PFLAU,1,1,2,1,1,-66,2,285,1019*79
$PFLAA,1,414,-931,285,2,FCA567,,,,,1*2C
8,N,03822.26510,E,0.968,,280217,,,A*72
$GPGGA,174315.00,5600.55978,N,03822.26510,E,1,04,4.72,154.1,M,12.5,M,,*55
$GPRMC,174316.00,A,5600.55981,N,03822.26513,E,0.772,,280217,,,A*71
$GPGGA,174316.00,5600.55981,N,03822.26513,E,1,04,4.72,153.6,M,12.5,M,,*53
$PFLAU,1,1,2,1,1,-69,2,285,1051*7A
$PFLAA,1,376,-981,285,2,FCA567,,,,,1*24
$GPRMC,174317.00,A,5600.55967,N,03822.26476,E,0.939,,280217,,,A*7B
$GPGGA,174317.00,5600.55967,N,03822.26476,E,1,04,4.72,154.2,M,12.5,M,,*5B
$GPRMC,174318.00,A,5600.55938,N,03822.26404,E,1.029,,280217,,,A*72
$GPGGA,174318.00,5600.55938,N,03822.26404,E,1,04,4.72,154.7,M,12.5,M,,*5E
$PFLAU,1,1,2,1,1,-69,2,284,1050*7A
$PFLAA,1,376,-980,284,2,FCA567,,,,,1*24
$GPRMC,174319.00,A,5600.55908,N,03822.26415,E,1.247,,280217,,,A*7A
$GPGGA,174319.00,5600.55908,N,03822.26415,E,1,04,4.71,153.6,M,12.5,M,,*59
$PFLAU,1,1,2,1,1,-69,2,285,1051*7A
$PFLAA,1,376,-981,285,2,FCA567,,,,,1*24
$GPRMC,174320.00,A,5600.55886,N,03822.26385,E,0.483,,280217,,,A*76
$GPGGA,174320.00,5600.55886,N,03822.26385,E,1,04,4.71,153.3,M,12.5,M,,*5F
$PFLAU,1,1,2,1,1,-72,2,285,1093*7E
$PFLAA,1,337,-1039,285,2,FCA567,,,,,1*1A
$GPRMC,174321.00,A,5600.55882,N,03822.26405,E,0.464,,280217,,,A*75
$GPGGA,174321.00,5600.55882,N,03822.26405,E,1,04,4.71,152.6,M,12.5,M,,*51
$GPRMC,174322.00,A,5600.55887,N,03822.26453,E,1.466,,280217,,,A*73
$GPGGA,174322.00,5600.55887,N,03822.26453,E,1,04,4.71,151.9,M,12.5,M,,*58
$PFLAU,1,1,2,1,1,-72,2,287,1093*7C
$PFLAA,1,338,-1040,287,2,FCA567,,,,,1*19
$GPRMC,174323.00,A,5600.55896,N,03822.26494,E,1.254,,280217,,,A*7E
$GPGGA,174323.00,5600.55896,N,03822.26494,E,1,04,4.71)▒▒r▒bj▒12.5,M,,*5C
$GPRMC,174324.00,A,5600.55906,N,03822.26528,E,0.804,,280217,,,A*79
$GPGGA,174324.00,5600.55906,N,03822.26528,E,1,0$PFLAU,1,1,2,1,1,-72,2,287,1094*7B
$PFLAA,1,338,-1040,287,2,FCA567,,,,,1*19
4,4.71,151.8,M,12.5,M,,*5A
$GPRMC,174325.00,A,5600.55900,N,03822.26489,E,0.684,,280217,,,A*72
$GPGGA,174325.00,5600.55900,N,03822.26489,E,1,04,4.71,152.4,M,12.5,M,,*58
$PFLAU,1,1,2,1,1,-74,2,286,1116*77
$PFLAA,1,307,-1073,286,2,FCA567,,,,,1*14
$GPRMC,174326.00,A,5600.55889,N,03822.26455,E,0.948,,280217,,,A*7F
$GPGGA,174326.00,5600.55889,N,03822.26455,E,1,04,4.71,152.5,M,12.5,M,,*5B
$GPRMC,174327.00,A,5600.55849,N,03822.26306,E,0.948,,280217,,,A*73
$GPGGA,174327.00,5600.55849,N,03822.26306,E,1,04,4.70,154.1,M,12.5,M,,*54
$PFLAU,1,1,2,1,1,-74,2,284,1115*76
$PFLAA,1,307,-1072,284,2,FCA567,,,,,1*17
$GPRMC,174328.00,A,5600.55857,N,03822.26318,E,0.694,,280217,,,A*72
$GPGGA,174328.00,5600.55857,N,03822.26318,E,1,04,4.70,154.5,M,12.5,M,,*5F
$PFLAU,1,1,2,1,1,-76,2,284,1131*72
$PFLAA,1,273,-1098,284,2,FCA567,,,,,1*11
from softrf.
lyusupov
commented on July 17, 2024
Fixed in c57a812
Corrupted sentences are filtered out with assistance of TinyGPS+ validation check.
from softrf.
Related Issues (20)
- SSID (Source Id) strips leading zero from device IDs HOT 1
- Baud Rate of SoftRF Serial Output is not documented HOT 1
- LilyGo no IMU after update HOT 2
- GNSS not responding on commands or send NMEA sentences HOT 1
- Ham Edition Firmware Download HOT 1
- SkyView firmware update 0.13-ESP32 fail HOT 1
- Broken iGates recommended for Ham-Edition HOT 1
- Android 12/ HOT 1
- SkyView losing GLD90 connection to Stratux and hanging HOT 1
- Standalone version problem HOT 2
- Frequency used in NZ HOT 1
- Issues with Flashing binaries to SkyView EZ HOT 2
- Aircraft database not loaded for Badge edition. HOT 1
- No Aircrafts data HOT 2
- Bad aircraft data HOT 5
- SoftRF UAV edition on ExpressLRS 900mhz receiver. HOT 1
- "Legacy" not functioning HOT 2
- LilyGo T-Echo - Badge - Unintended Power-On Problem HOT 1
- SoftRf and Glider Flarm update version 7.22 HOT 2
- flarm targets are found - but they are always more than 3xx km away. HOT 2
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from softrf.