An advice to connect a GPS antenna

Discussion and support for the Nmea4Wifi multiplexer - a 4-input Nmea 0183 wifi multiplexer.
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mandrake
Posts: 1
Joined: Tue May 19, 2020 4:30 pm

An advice to connect a GPS antenna

Post by mandrake » Wed May 20, 2020 6:58 am

Hi,

What is your advice to connect a GPS antenna (see picture) to the NMEA4WIFI ?
I dont want to broke something.

best regards
Attachments
GPS_Serial_Spécifications.jpg

Luis Sa
Site Admin
Posts: 843
Joined: Thu May 04, 2017 4:12 am

Re: An advice to connect a GPS antenna

Post by Luis Sa » Wed May 20, 2020 9:11 pm

Hello,

For the data to be read by an input port, say P2, you should connect TX to A2 and GND (the ground wire from the antenna) to B2.

Regards Luis

Petter
Posts: 5
Joined: Wed Jul 01, 2020 12:44 pm

Re: An advice to connect a GPS antenna

Post by Petter » Wed Jul 01, 2020 3:36 pm

Hi,
The GPS antenna on the picture has 12V power supply. There are several nmea 0183 GPS antennas that require 5V power supply. Is there any 5V output powerful enough for a GPS antenna (max 45mA) available on the Nmea4Wifi?
/Petter

Luis Sa
Site Admin
Posts: 843
Joined: Thu May 04, 2017 4:12 am

Re: An advice to connect a GPS antenna

Post by Luis Sa » Wed Jul 01, 2020 4:51 pm

Hello,

The multiplexer has a 5V switching voltage regulator. It is a red module with a red led light (in older versions this regulator was green and had no led). It has 4 pins. One is EN which is open (in recent versions I just use the other 3 pins leaving that unused). The other 3 pins are Vin Gnd and 5V. Vin is near the unesed EN. The maximum current is 1.3 A but I doubt it would support such a current. The multiplexer takes about 70 mA at 12V. So at 5V it will supply about 186 mA assuming an efficiency of 90% . I assume that it will support the extra 45mA. You need to be careful in getting the 5V out of the regulator (soldering a wire, etc...)

The regulator is this one:

https://www.aliexpress.com/i/3284233300 ... 2b97jwuoAs

Regards, Luis

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