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Forum Index : Microcontroller and PC projects : Am I right or wrong in thinking
| Author | Message | ||||
lew247 Guru  Joined: 23/12/2015 Location: United KingdomPosts: 1702 |
That using one of these inserting a 4G sim card that works all I would have to do is send and recieve AT commands to get web pages or send web pages using HTTP GET and HTTP POST? Is it really that simple? and I could send the gps location data using the same commands? it's probably not that simple, I guess it couldn't be, but it would be nice it it was, you could put sensors anywhere and use the pico and 4G to get the data IOT demo code in C and Python AT commands for this board Wiki   Only £32.40 incl. VAT in the UK Edited 2022-12-15 02:24 by lew247 |
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| Tinine Guru Joined: 30/03/2016 Location: United KingdomPosts: 1646 |
2G SIM but that's all I can contribute  |
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| JohnS Guru Joined: 18/11/2011 Location: United KingdomPosts: 4147 |
Maybe this one? But I am by no means sure! Sold by such as John |
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| lew247 Guru Joined: 23/12/2015 Location: United KingdomPosts: 1702 |
Where did you get 2G sim from? it's 4G LTE  |
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Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 8304 |
Yes, Lew, you are right or wrong. :) Not sure how you derive 4G from that spec... Mind you, I know nowt about this stuff so that's hardly surprising. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| JohnS Guru Joined: 18/11/2011 Location: United KingdomPosts: 4147 |
I think the answer (for 4G in the UK) may be B20 (800MHz) & B3 (1800MHz). If so, the OP is OK. I've used here There are more, but I didn't want to get into FDD, TDD etc. I posted the other board/chip version as it has LTE (and is sold in the UK). John Edited 2022-12-15 20:09 by JohnS |
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| Tinine Guru Joined: 30/03/2016 Location: United KingdomPosts: 1646 |
I just saw the 2G stated. I had a tracking device for my dog and it would only work with a 2G SIM. I am also clueless about this stuff  Craig |
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| lew247 Guru Joined: 23/12/2015 Location: United KingdomPosts: 1702 |
I actually meant communication over the phone network using the sim I know it's 4G because the UK uses mostly B1, B3 and B20 and it's an LTE device I meant talking to it, is it as simple as using http get and http post using the uart port GP0, GP1 and GP17 to wake the module and GP14 to shut down the module |
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| pd-- Senior Member  Joined: 11/12/2020 Location: AustraliaPosts: 122 |
Not Quiet If you where in Aus you would pick one that supported LTE Band 28 because that is telstras main 4g frequency After power up the first thing you need to do is chapter 4 bearer configuration This is the bit that needs to chk if you have a valid sim / good enough signel strength etc then you need to specify what APN to connect to ie telstra.internet and username/password if its required then get an ip address and dns servers addresses and finally you are free to do your HTTP GET The bord manufactures generally have stuff written for there country you may just need to tweak it a little or make it more robust for your particular telco And finally there are special 4g iot sims with limited bandwidth and very cheep prices The best place to start is your chosen telco they will have a list of what devices are known to work. |
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| JohnS Guru Joined: 18/11/2011 Location: United KingdomPosts: 4147 |
Please explain what that means. Would the telco be the one the SIM is for? What do you mean by "devices"? John |
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| pd-- Senior Member Joined: 11/12/2020 Location: AustraliaPosts: 122 |
What i was trying to say is rather than going out and buying a random device ie the one listed at the start of the post https://www.waveshare.com/product/raspberry-pi/boards-kits/raspberry-pi-pico-cat/pico-sim7080g-cat-m-nb-iot.htm do a bit of research on what is known to work with your phone company / sim provider I found it a lot easier to start with the phone company / sim provider ie https://www.telstra.com.au/business-enterprise/products/internet-of-things https://www.telstra.com.au/small-business/internet-of-things/data-sim-plans That way you can get the correct sim for your application ie lpwan or a standard iot plan then choose the device " 4g/5g modem" that supports the network that you wish to connect to at the data rate your application needs On the device " 4g modem" listed above it lists its sim card slot as only supporting a NB-IoT / Cat-M card (1.8V ONLY) hope that helps and yes it is a bit more complicated than just stuffing your mobile phone card into it but with plans starting at $1 a month it can be a very cheep way to get things communicating with each other |
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Grogster Admin Group  Joined: 31/12/2012 Location: New ZealandPosts: 9760 |
Agreed. Actually, choosing a SIMCOM module that will work on your country's cellphone network can be something of a technical nightmare. At least it USED to be, but now, basically from 4G LTE onwards, the entire planet seems to have standardized cellphone bands and frequencies, which makes modules that work anywhere much more easily producible. Prior to that, 2G and 3G could be on any one of a plethora of frequencies, depending on what that specific country decided to assign it's network to, which meant that you had to make sure you chose a module with the correct suffix to work in your country, or the frequency bands would be incompatible, and the bloody thing would simply refuse to talk. Yes, I speak from experience. Thankfully, these daze, that has changed and you are much more likely to find that any given module will work on your cellphone network, provided you make sure you select the global variant, as it will have all the global standard frequencies in it. The SIM7080G module used in this Waveshare module, SHOULD work anywhere in the world, as it is a global module as far as IoT is concerned. Without downloading and reading the datasheet for the 7080G(which I might do later), I don't know if it would support SMS/text messaging on the 3G or 4G LTE networks, so sending text messages to cellphones is something you might need to check up on, but at first glance this is NOT supported, just the IoT data stuff. Smoke makes things work. When the smoke gets out, it stops! |
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