Changes between Version 1 and Version 2 of Howto/ResetGPSReceiverToNMEAMode


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Timestamp:
05/08/08 12:41:41 (9 years ago)
Author:
tj
Comment:

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  • Howto/ResetGPSReceiverToNMEAMode

    v1 v2  
    11= Reset GPS Receiver to NMEA Mode = 
    22 
    3 A RoyalTek (Sapphire) RGM-2000 recently stopped working with Tom-Tom Navigator on a Windows PPC 2003SE PDA. Tom-Tom would show it had the serial connection (spinner in top-left of GPS status window) but never got a lock. The settings were NMEA Receiver, 38400 baud, Serial on COM1. 
     3A !RoyalTek (Sapphire) RGM-2000 recently stopped working with !TomTom Navigator on a Windows PPC 2003SE PDA. Tom-Tom would show it had the serial connection (spinner in top-left of GPS status window) but never got a lock. The settings were NMEA Receiver, 38400 baud, Serial on COM1. 
    44 
    55I got a copy of the [http://www.teletype.com/pages/support/verifying_communications.htm tty] utility to verify that communications were working. Connecting to COM1 at 38400 showed data coming in but it was ''garbage'' or, to the untrained eye - corrupted. After a while fiddling with port settings I was sure this wasn't just a case of the wrong settings. In the meantime I noticed there did seem to be a pattern to the received data from the GPS receiver so I did some searching for problems with the receiver model. 
     
    1313With the GPS receiver connected, on the PDA I opened `Navigator.ARM.CAB` which caused it to be installed. Then, from the '''Programs''' menu I launched '''Navigator'''. 
    1414 
    15 In Winfast Navigator I did '''Tools''' > '''Port Setting...''', dismissed several error message dialogs, and set the '''Port''' to "Serial COM1:", BaudRate to 38400, and '''GPS Protocol''' to SiRF. 
     15In Winfast Navigator I did '''Tools''' > '''Port Setting...''', dismissed several error message dialogs, and set the '''Port''' to "Serial COM1:", !BaudRate to 38400, and '''GPS Protocol''' to SiRF. 
    1616 
    17 The status screen immediately showed good values being received which confirmed the GPS receiver was working fine. 
     17The '''View''' > '''Navigation''' window immediately showed good (SiRF) values being received which confirmed the GPS receiver was working fine. 
    1818 
    19 I the selected '''View''' > '''Development''' followed by '''Tools''' > '''Command...'''. 
     19To change to NMEA  mode I then selected '''Tools''' > '''Command...'''. 
    2020 
    2121I selected the '''NMEA''' tab and changed the values using the spinners to show: 
     
    3232User 0 
    3333}}} 
    34 I pressed '''OK''' and then returned to the '''View''' > '''Development''' window and could see NMEA text data being sent. 
     34I pressed '''OK''' to send the command to the GPS receiver and then returned to the '''View''' > '''Development''' window and could see NMEA text data being received. 
    3535 
    36 I exited Winfast Navigator and started TomTom Navigator. This time its GPS Status window immediately showed it was recieving valid data and it wasn't long before it had a fix. 
     36I exited Winfast Navigator and started !TomTom Navigator. This time its GPS Status window immediately showed it was receiving valid data and it wasn't long before it had a fix.