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Have you confirmed if the connections from the compass are connected appropriately? try swaping them around. you must have GPS + compass correctly connected or it will switch to warning mode. |
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That looks nice and clean did you use pin headers or cut the wires short?
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Last edited by pawelsky; Aug 05, 2015 at 05:41 AM.
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Been out on the back lakes. Work related. Okay, I have found something of note here. I was doing simple continuity of the leads from the GPS PCB to Adapter's PCB, the thru hole soldered pins of the molex . One by one sequentially, Gnd to Gnd, Tx to Tx and so on. Ostensibly testing the wire leads between the adpater and the GPS. For the most part it went like text book,....until I checked improbable combinations of test circuits, I found I was reading continuity between GPS_Gnd and Adapter_Tx, with the expected continuity to Adapter_Gnd . Maybe an iron filing or steel wool frag in there...I blew out everything and brushed it down and so on. I thought this strangeness had gone away, but then found I could read zero Ohms between GPS_Rx and GPS_Tx with regular continuity to Adapter_ Rx. These are not all of the strange combinations I experienced. I am using a quality Fluke multi-meter, have not been drinking nor taking mind altering drugs. I have used a USB Microscope to search for causes of this but can see none. What makes it more difficult is the size of the probes. ( I have needle tips coming) I feel confident that I was getting these readings because they were not adjacent to one another A bonifide "ghost in the machine" ? or have I just met Murphy ? I was hovering over the"Submit" button because it sounds so improbable, but there it is. I had to get this off my desk |
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Last edited by wits_end; Aug 08, 2015 at 09:43 AM.
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Found another Neo6M ... moments later it is sitting on the window ledge and the adapter is blinking twice and I am doing back flips. I didn't even solder the chip . I can usually get better that 12 sats on this ledge I used the old cable from the defunct GPS Tested the old GPS module with Uenter and found it was still seeing 12 sats. Would be nice to understand what has occurred here, the module is basically brand new - no better than 6 flights. For the meanwhile I will use the GPS from the Pixhawk rig, and I will try to make repairs to the non functional So just to see if it might work, I will attempt to solder in the V.Kel Ublox 8030 chip, the manufacturer assured me this would solder right in place of the Neo6M. This of course will give me M8N w GPS and GNSS, not that I need it in a rural setting. I will report back with documentation /photos. Perhaps with this process I can narrow down if it is something going on with the module's PCB rather than the Ublox chip. We will soon know. |
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Last edited by wits_end; Aug 11, 2015 at 11:07 PM.
Reason: less words
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Pawelsky
First I would like to thank you for all of your hard work regarding this project. I have been following it for about a month or so. After a week I decided that I would build it. Being that I only needed to buy the circuit board and MOSFET for the reverse polarity, everything else I had in stock. Boards arrived in about 12 days MOSFET only took 3 days. Upon receiving the boards I built all three and test with pro mini connected via dupont on the bench. All of them worked perfectly, great design on the PCB and super great work on the firmware. I had a chance this last weekend to add the pro mini and mount it in the F550 hex. I have now more than 24 flights with this module and have tested 7 different GPS units ranging from 2 NEO M6, 1 LEA6H and 4 M8N units, all rock solid performers with this module. The stock Naza-M v2 GPS was so bad that it was un-flyable, sometimes ten minutes to lock-on only to loss lock in flight. The ship is now fun to fly again. Thank you so very much for all your work and effort. |
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Will This GPS work with the Adapter and what should be the compass orientation and what changes I need to do in the codes and mounting arrangement.
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Orientation is described in the first post. Since the compass is on the same side as the antenna you'll have to solder the "COMPASS FACING UP" pad on the PCB. |
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One more querry please. Do I have to use only those listed M8N GPS or I can use any M8N GPS.
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if you choose one not listed here that is known to work your being a test subject
most should work if they are not hard locked to a given configuration and have the same connectors you can however post any results you have whether it works for other people |
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If you happen to be running an M Lite with the udnham upgrade to V2, I would recommend not. You will end up back at M Lite FW and have to start all over again. It is not critical for most folks anyway. That is all I can comment on.
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capman231 |
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@Pawelsky
First of all I would like to thank you very much for all of your hard work re: this project (and for all the testers) and for allowing anyone with the relevant skills to assemble your GPS Adapter design. I have been following this thread for about a month so I decided that I would build your GPS Adapter as I already have a Drotek NEO-8MN GPS and hopefully that will work OK ... time will tell! I have an order placed on OSH Park for APM 2.6 GPS to Naza adapter v0.5 PCB's they have been shipped and now just waiting for delivery...... One question for you please; What are the two connections for from D2/D3 Arduino Pro Mini to F2/F1 bottom pin of Naza Lite ? And if you would be so kind to look over my attached diagram and give some technical comment. |
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Last edited by max3228; Aug 31, 2015 at 07:16 AM.
Reason: Corrected error (PMU to X2) Tarot 690S Circuit Diagram
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