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Forum Index : Microcontroller and PC projects : GPS
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mibinho Newbie  Joined: 06/03/2023 Location: GermanyPosts: 7 |
Hello, my name is Mirco. I am new to shed and have a question. I used the search function without any results - maybe I'm too stupid  I need for my small pico-Basic-project the correct time. As I don't want an rtc-module (eg.DS1307), i thought about a GPS-receiver. Which GPS-Module should I buy? small size and affordable... thanks Mirco -- the vermin have inherited the earth. |
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CaptainBoing Guru  Joined: 07/09/2016 Location: United KingdomPosts: 2080 |
welcome to the forum. you don't say which 'mite you intend to use - this is important as some have GPS comms built in. with others (micromite) you'll have to hand-crank the GPS from the comms port (not hard) Geoff has a "superclock" on his webpages here https://geoffg.net/SuperClock.html I used a similar approach for my workshop clock with scrolly dot matrix display because I needed it to be spot-on (not just keep time) do a bit of research on what you want, then take your pick from these sort of things https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2334524.m570.l1313&_nkw=gps+module+arduino&_sacat=0&LH_TitleDesc=0&_odkw=gps+module+arduino&_osacat=0&_sop=15&LH_PrefLoc=2 Edited 2023-03-10 03:08 by CaptainBoing |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9139 |
What are you using as the processor. These work great if using a Pico |
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| mibinho Newbie Joined: 06/03/2023 Location: GermanyPosts: 7 |
I am using a Raspberry Pi Pico with Picomite 5.07.06. THESE cheap modules work with picomite and I can use the gps(time) command to get the gps-time and later set the pico-clock? Sorry for the stupid questions  -- the vermin have inherited the earth. |
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Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6814 |
It might work with the GPS functions of the PicoMite. See the manual on how to set it up for 9600 baud. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| CaptainBoing Guru Joined: 07/09/2016 Location: United KingdomPosts: 2080 |
I reckon it will be ideal, it outputs NMEA strings to its serial port - if you connect its Tx pin to your COMx Rx pin then have Open "COM1:9600" as GPS (or similar - I may not have the precise syntax here but you can look it up in the manual) you should be good to go (yes it really can be that simple) Edited 2023-03-10 06:45 by CaptainBoing |
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| VK2CBH Newbie Joined: 18/08/2014 Location: AustraliaPosts: 11 |
I have been working with a Raspberry Pi Pico and a GPS receiver. I cannot remember what software version that I am using. The GPS module I have been using is a V.KEL VK2828U7G5LF. I purchased this from Silicon Chip in Australia, but I assume that you could find these on E-Bay. I was able to decode NMEA strings and display time, date, latitude, longitude and the number of satellites. Using the GPS() function makes it very easy too. I tried to upload a pic of my display but the file was too large. Cheers Brett |
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| CaptainBoing Guru Joined: 07/09/2016 Location: United KingdomPosts: 2080 |
"be a man" real men decode the strings  I did on my workshop clock ('170 powered) but I would have used GPS(TIME) if I could  |
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Chopperp Guru Joined: 03/01/2018 Location: AustraliaPosts: 1058 |
Hi I've using these from Core Electronics with a Pico using the GPS functions. Works well at 3V3 volts with the Pico driving a 40 x 2 LCD for testing & playing. Brian ChopperP |
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| JohnS Guru Joined: 18/11/2011 Location: United KingdomPosts: 3816 |
They do! No soldering needed :) John |
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PilotPirx Regular Member  Joined: 03/11/2020 Location: GermanyPosts: 69 |
Why don't use a DCF77 receiver? It is cheap (5€) , need only 1 pin and i wrote a decoder for this. But you need time, 1minute minimum. Here is the thread: DCF77 Decoder |
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| JohnS Guru Joined: 18/11/2011 Location: United KingdomPosts: 3816 |
Where is it so cheap? John |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6814 |
https://www.ebay.co.uk/itm/165916797689 Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| PilotPirx Regular Member Joined: 03/11/2020 Location: GermanyPosts: 69 |
I bought it at Amazon for 5.19€.Just search for Milageto DCF77. But three weeks delivery time. |
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| mibinho Newbie Joined: 06/03/2023 Location: GermanyPosts: 7 |
Thanks for all your help. Just ordered one of these cheap modules. I can't find the Open com1 as GPS in the manual. I'll have to figure it out or can you tell the correct syntax? -- the vermin have inherited the earth. |
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phil99 Guru Joined: 11/02/2018 Location: AustraliaPosts: 2141 |
It needs to be like this:- Open "COM1:9600" as GPS Manual p107. Search for GPS, there are lots of related things. Edited 2023-03-12 21:20 by phil99 |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6814 |
Probably about page 73 of the manual. OPEN comspec$ AS GPS [,timezone_offset] [,monitor] Will open a serial communications port for reading from a GPS receiver. See the GPS function for details. The sentences interpreted are GPRMC, GNRMC, GPCGA and GNCGA. The timezone_offset parameter is used to convert UTC as received from the GPS to the local timezone. If omitted the timezone will default to UTC. The timezone_offset can be a any number between -12 and 14 allowing the time to be set correctly even for the Chatham Islands in New Zealand (UTC +12:45). If the monitor parameter is set to 1 then all GPS input is directed to the console. This can be stopped by closing the GPS channel. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| mibinho Newbie Joined: 06/03/2023 Location: GermanyPosts: 7 |
Found it on page 110 in the actual manual 5.07.06. But the exact syntax must be something like this: SetPin GP1,GP0,COM1 Open "com1:9600" As GPS, -1 -- the vermin have inherited the earth. |
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