NMEA 0183 device not receiving data from NGX-1
If your NMEA 0183 Listener is not showing any data when connected to the NMEA 0183 output of an NGX-1, the first step for fault finding should be to see if the NGX-1 supports the conversions you need.
As NMEA 2000 continues to grow, an NMEA 0183 equivalent isn’t always available. In the latest version of NMEA 0183 released in June 2012, there are 148 sentences with between 550 – 570 data fields. In total contrast, in the latest version of NMEA 2000 released in February 2015, there are 163 PGN messages and 1569 data fields.
Refer to the NGX-1 Full Conversion List for v2.660 here : NGX-1 Full Conversion List
Viewing NMEA 0183 Data After finding out that the conversions you need ARE supported, the next step is to find out if the NGX-1 is converting and outputting the required data. The video below will explain how to view NMEA 0183 data coming from the NGX-1 using our free NMEA Reader software. NMEA Reader can be downloaded using this link. This video goes into more detail: https://www.facebook.com/ActisenseNews/videos/1794697057208242/
Recording Data for Analysis The next video will explain how to record the data for further analysis (using EBL Reader) by either yourself or our support team. EBL Reader can be downloaded using this link. This video goes into more detail: https://www.facebook.com/ActisenseNews/videos/1796763263668288/
Wiring Instructions If the required NMEA 0183 data IS being sent by the NGX-1 the next step is to check the wiring connections and ensure the baud rates between the two devices are the same. NGX-1 wiring is as follows:
| NGX-1 WIRE COLOUR | RECEIVE / TRANSMIT | WIRE ON CONNECTED DEVICE |
| Yellow | Rx+ | Tx+ |
| Green | Rx- | Tx- |
| White | Tx+ | Rx+ |
| Brown | Tx- | Rx- |
You will know what baud rate the NGX-1 is operating at when you successfully open the COM port in NMEA Reader (explained in the above video). Ensure your NMEA 0183 Listener uses the same baud rate.
Changing the NGX-1 Baud Rate If you need to change the NGX-1 baud rate, refer to the NGX-1 User Manual for instructions.
Viewing NMEA 2000 Data If the required NMEA 0183 data IS NOT being sent by the NGX-1, a closer look needs to be taken at the data that is available on the NMEA 2000 network. To do that you will need to repeat the steps in the above video using an Actisense NGX-1 in Transfer Rx All Operating mode.
For more information on NMEA 0183/NMEA 2000 and how it works, please download our free guides here: https://actisense.com/actisense-hub