Build an SMS Forwarder with Raspberry Pi Zero W and Waveshare SIM7000E Hat • Hacker News Board

Re: Build an SMS Forwarder with Raspberry Pi Zero W and Waveshare SIM7000E Hat

#51

Post by lostlogin » Mon, Feb 22, 2021, 5:57 AM UTC

newhouseb wrote: post #42

z92 wrote: post #15

If you can't purchase the GNSS HAT, use an old Android phone and install Termux on it. Then run some bash scripts on the phone that will do the job. The phone will communicate with your network over wifi, and replaces both the Raspberry PI and the HAT.

Also important to note that the Android approach is more likely to continue to work. In many places (certainly Manhattan, where I am), everything but LTE (and I gues 5G) has long been turned off such that GSM/Edge/UMTS/etc no longer work.

> everything but LTE (and I gues 5G)

Oh wow. Various types of monitoring use cellular, house alarms etc.

Are those things just using LTE now?

Re: Build an SMS Forwarder with Raspberry Pi Zero W and Waveshare SIM7000E Hat

#52

Post by lostlogin » Mon, Feb 22, 2021, 5:58 AM UTC

danielschonfeld wrote: post #13

Can someone please explain to me the appeal of telegram (as opposed to signal)? Maybe I don’t understand something or am too old but how is it a safe haven compared to WhatsApp in the wake of the WhatsApp debecle. I just fail to understand.

> Can someone please explain to me the appeal of telegram (as opposed

Or Slack?

Re: Build an SMS Forwarder with Raspberry Pi Zero W and Waveshare SIM7000E Hat

#53

Post by pjmlp » Mon, Feb 22, 2021, 5:59 AM UTC

ComputerGuru wrote: post #47

pjmlp wrote: post #26

Earlier quoted context omitted.

I hardly use more than a couple hundred from my 5 000 monthly budget to external networks, on the same network they are free.

I think I failed to convey my point clearly. My point is that if you need a separate sim per IoT device, the (possibly monthly) cost of a sim and number will greatly exceed the cost of messages sent.

About 15 € every couple of months, maximum 3 months allowed without charging, is the cheapest pre-paid I can remember around here.

Re: Build an SMS Forwarder with Raspberry Pi Zero W and Waveshare SIM7000E Hat

#54

Post by ChrisRR » Mon, Feb 22, 2021, 9:57 AM UTC

toomuchtodo wrote: post #6

When would you use this SMS gateway versus something like Twilio, Plivo, or Bandwidth.com terminating a DID for SMS service?

Why does any engineer/developer do something from scratch when existing solutions exist?

For fun

Re: Build an SMS Forwarder with Raspberry Pi Zero W and Waveshare SIM7000E Hat

#55

Post by newhouseb » Mon, Feb 22, 2021, 1:01 PM UTC

fsagx wrote: post #50

newhouseb wrote: post #42

Earlier quoted context omitted.

Also important to note that the Android approach is more likely to continue to work. In many places (certainly Manhattan, where I am), everything but LTE (and I gues 5G) has long been turned off such that GSM/Edge/UMTS/etc no longer work.

Cell site visualization tool featured on HN front page a few days ago shows thousands of 2g and 3g sites in NYC https://alpercinar.com/open-cell-id/

I wonder how this data is collected and how long it takes for a tower to not be be seen before it drops off the map.

Carriers may be keeping a small (relative) amount of capacity up and running, but in the meantime prevent new activations (ATT does this with there 3G network for example), so "coverage" is a bit misleading in many cases.

Re: Build an SMS Forwarder with Raspberry Pi Zero W and Waveshare SIM7000E Hat

#56

Post by ComputerGuru » Mon, Feb 22, 2021, 5:14 PM UTC

pjmlp wrote: post #53

ComputerGuru wrote: post #47

Earlier quoted context omitted.

I think I failed to convey my point clearly. My point is that if you need a separate sim per IoT device, the (possibly monthly) cost of a sim and number will greatly exceed the cost of messages sent.

About 15 € every couple of months, maximum 3 months allowed without charging, is the cheapest pre-paid I can remember around here.

That makes sense. The provider incurs an ongoing (trivial to them in bulk) cost for leasing you the number so they can’t let them go stale - although three months is definitely more than lining their pockets. My VoIP provider charges a fixed 99c/month for each unique phone number. 15 € for three months is cheap for personal purposes when you have just a few in the field but isn’t sustainable for large scale deployment. I continue to be impressed by what can be accomplished in the 915 MHz ISM band; it’s not LoRaWan proper but you can achieve non-line-of-sight communication over a hundred and fifty miles (at obviously incredibly slow bitrates) with some signal conditioning magic. It would be amazing to spread a network of these around the world to enable constant low-bitrate communication without a base rate for pure pay-as-you-go options.

Re: Build an SMS Forwarder with Raspberry Pi Zero W and Waveshare SIM7000E Hat

#57

Post by newhouseb » Tue, Feb 23, 2021, 1:13 AM UTC

lostlogin wrote: post #51

newhouseb wrote: post #42

Earlier quoted context omitted.

Also important to note that the Android approach is more likely to continue to work. In many places (certainly Manhattan, where I am), everything but LTE (and I gues 5G) has long been turned off such that GSM/Edge/UMTS/etc no longer work.

> everything but LTE (and I gues 5G) Oh wow. Various types of monitoring use cellular, house alarms etc. Are those things just using LTE now?

In the states, LTE Cat M1 is most frequently what's used / available from my experience for IoT. In other places NB-IoT is more prevalent (which is way slower, but also way simpler)