I'm still waiting on my two gps expansion
@Leonard-Stroman Unfortunately many of us do. But i am sure that they will ship them if they are in a quality that we are happy with. I could imagine making hardware is sometimes a hard business and needs heavy testing.
Anyway... you can use any gps module that is connected via UART / TTL and echo´s NMEA data with Arduino expansion or USB to TTL adapter. It works very well.
But from the beginning:
I bought two Ublox Neo-6M. I connected it with an USB to TTL adapter. Tested on my local pc without a problem. Very fast gps fix.
Then i connected with my Onion. No gps.
What i tried: Just connecting VCC and GND, no RX/TX, connecting VCC and GND from another power supply and connecting RX/TX only. Bought another gps module from Adafruit.
When does the gps module work (reproducable for both types of modules):
Simply when the Onion is turned off.... when its powered on i dont get a fix. After i turn the Onion of i have a fix after about 30 seconds. When the Onion is not turned on at all i get a fix within 5 seconds...
There must be smth wrong with the Onion that makes pretty much interference.. i have no other idea. Anyway i have to add that i am not knowledged with electricity and interferences or magnetism.
I will try one other thing: Tmrw the external antenna for the adafruit gps module is shipped... lets see what happens when the antenna is placed far away from then onion.
Thankful for any help.
Like i expected.. with external antenna, placed far away (> 60cm) from onion the gps signal is good. Below 60cm the gps signal becomes weak or completely unable to find a fix.
What is causing this on the onion? Honestly, but that would be a desaster that the onion causes such big interferences!