Petee Posted July 4, 2019 Share Posted July 4, 2019 Hardware: 1 - NEO-8M GPS Satellite Positioning Module for Arduino STM32 C51 $7.49 USD on Ebay. NOTE it is using TTL output. Validated USB GPS connection to work fine. 2 - Uxcell a14041500ux1216 MAX232CSE Transfer Chip RS232 to TTL Converter Module COM Serial Board for $7.37 USD (Amazon) I connected PPS pin to Pin #1 on RS-232 interface. Using Linux connected USB port and RS-232 port to laptop. I see GPS chit chat fine on two serial intefaces. Using this for a new PFSense box QOTOM Mini PC. Transport ==> USB power coming from QOTOM Mini PC and RS-232 coming from GPS/TTL converter. NOTE: PFSense is BSD. I see only one serial interface using command line /dev: cat cuaU0 $GNTXT,01,01,02,u-blox AG - www.u-blox.com*4E $GNTXT,01,01,02,HW UBX-M8030 00080000*60 $GNTXT,01,01,02,ROM CORE 3.01 (107888)*2B $GNTXT,01,01,02,FWVER=SPG 3.01*46 $GNTXT,01,01,02,PROTVER=18.00*11 $GNTXT,01,01,02,GPS;GLO;GAL;BDS*77 $GNTXT,01,01,02,SBAS;IMES;QZSS*49 $GNTXT,01,01,02,GNSS OTP=GPS;GLO*37 $GNTXT,01,01,02,LLC=FFFFFFFF-FFFFFFFD-FFFFFFFF-FFFFFFFF-FFFFFFF9*50 $GNTXT,01,01,02,ANTSUPERV=AC SD PDoS SR*3E $GNTXT,01,01,02,ANTSTATUS=OK*25 $GNTXT,01,01,02,PF=3FF*4B This is coming from the USB serial connection (and power). I have the RS-232 9 Pin (from TTL to RS-232) plugged in to Quotom serial com port #1. I do not see this port using command line where as I saw this in Linux. If I power the GPS externally I see chatter from the RS-232 connection fine with Linux but not in BSD. Any suggestions? I am currently using a Sure GPS with a PPS modification on another PFSense box and it is working fine. Link to comment Share on other sites More sharing options...
Petee Posted July 4, 2019 Author Share Posted July 4, 2019 Well posting out loud here figured it out. 1 - bios serial port settings were off. Here there are 4 serial ports out and none were enabled 2 - PFSense baud rate was incorrect All is well now. Apologies for the fuss. Link to comment Share on other sites More sharing options...
sfx2000 Posted July 6, 2019 Share Posted July 6, 2019 Hmm... rather than say Pin #, use the signal line, e.g. Tx, Rx, CTS, RTS, DTR, DCD, etc... Just a thought - for PPS, drop it on the DCD line for UART - GPSD can pick this up - this is a well known "hack" called the Macx-1 mod that was used with Ublox 6/7 with PL2303. Link to comment Share on other sites More sharing options...
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