tm4c123gh6pm: Sending wirelessly from tm4c development board

Would it not (perhaps) ease the job of your audience if you included "any/all" Power, Cost, Antenna, Data Rate & Physical Size specifications?

100Km - directly from "board to board" - is not the intent of (any) low power, wireless device...

Charles Tsai said:

What about pairing the TM4C with your phone via bluetooth and use your phone as a gateway to send the data

This may work - yet has the following limitations:

• may require (another) phone @ the remote (100Km distant) location
• untold is the duration of such traffic - cost may become too high
• should 24/7 (potential) operation be required - two phones are sacrificed
• two such cells are not always, "up & fully" functional

"Real" radio links have (long) existed - just for this purpose.     Depending upon the season, signal propagation, even weather - a (proper/REAL) radio link may determine the best/clearest frequency & will "punch thru."        

You may note that during the "World Trade Center" attack (9-11) in NYC - such radio gear - from my firm & others - was the ONLY (wireless) means of communication - all cells were DOWN!

Hi Charles,

Minus those (real/business-side) specifications (NONE provided) - post borders upon (pardon) fantasy/chronic over-reach.      

About 10 years past - from just outside Chicago (USA) - I "worked" (communicated with) another radio ham - on 144MHz - who was 7 miles from my tech office.       Seven MILES - C'mon cb1 - anyone can do that!      

Except that we both designed & built our own equipment - and "BOUNCED OUR SIGNALS OFF THE MOON!"       (thus avoiding a "high hill" - and "Line of Sight!" - as earlier proposed...)

This effort required more than 20 re-designs & antenna orientations - months worth of effort - & kilo-bucks, prior to success.     Somehow - it never occurred to either of us - to "post upon a forum..."

Charles Tsai said:

I think the Willis tower is blocking your signal.

That (may) explain why I located "near, yet just outside of Chicago."       Hams have power restrictions (1KW) enforced by FCC.     Without admitting (any) "breach of law/rules" - it was noted that, "Every light w/in my office complex DIMMED" as I keyed the Quad Eimac Tetrodes (TX AMP) - powered by 220VAC  - and we "Got Thru!"

Thanks guys for replying...

I understand now that from board to board sending messages at such low power not possible. Will it be possible to interface a tm4c series microcontroller with a gsm module which can be used for sending messages over gsm network.

if yes: which development board(tm4c123g/tm4c129x) will be better for gsm interfacing and please mention which gsm module (part no)can be used. It will be of big help if someone can provide some start code as i am completely new to gsm interfacing. 

My friend - your goal (2 way commo, covering 100Km - via (very) low power) is NOT impossible - but IS "Highly Unlikely."

Note that a (very) "perfect storm" WAS required for "vendor's (claimed) success."     (i.e. a HIGH Hill, Line of Sight, (and I expect, very high gain antennas - deployed "both ends"))

As one (long) trained in Military, Ham, Defense Radio/Radar and Public Safety radio - points I raised seemed, "on point."

Vendor agents, perhaps others - best qualified to guide from here - good luck...

Hundreds of questions remain...
- Will these two boards reside in fixed locations?
- Can intermediate relaying boards be deployed?
- Can this communication depend on 3rd part solutions?
- If so, is this an urban cell-covered area?
- Can proprietary/open 3rd part solutions for small packets, such as LoRA, be used?
- What sort of power supply is available? What are the requirements for battery life?
- Shall it be hidden? Can it be installed on top of a post? How long must it work for unmanned?
There are several 3G modules out there, for one of the possible solutions... the launchpad itself is the least of the worries (and actually, simplelink Launchpads such as CC13xx can communicate and run code at the same time, no need for a Tiva). But one could as well connect the TM4C board to a serial printer, print the message on a paper strip, give it to a horseman who would cross these 100Kms in some three hours, scan the paper on the other end in which an OCR software is implemented - and the message is transmitted... any solution can be inadequate if the premises are unknown.

Are you saying that a single (biased), "Youtube video" does not provide absolute, "Proof of Concept?"       (Ye of little faith...)