You could use ham radio packet protocols, a pair of VHF portable radios at about $50 each and put them on one of the VHF unlicensed MURS frequencies. Modem can be done over sound card using the DireWolf program. Not sure what you are connecting on each end and what type of displaying methodology you need but it's a good set of building blocks to work from.
https://github.com/wb2osz/direwolf Thank You, Brian Webster <http://www.wirelessmapping.com> www.wirelessmapping.com www.Broadband-Mapping.com From: Af [mailto:[email protected]] On Behalf Of [email protected] Sent: Tuesday, December 29, 2015 5:59 PM To: [email protected] Subject: [AFMUG] OT slow speed real time data I need to haul some very small slow amounts of data up to 2000 feet. I could do the garage door opener band but I want to display the data on a smart phone. Not sure how realtime SMS might be. Cellular data modem modules are way overkill. Was thinking of just putting a cheap cell phone at one end and using bell 202 format over it. I would have to write some kind of decoding app. But then you have your phone tied up all the time you are using the system. Still like the SMS idea but need the data within a second or two of transmission, not minutes (or hours in the case of my AT&T phone when it is powered off. Sometimes takes up to 12 hours to receive SMS).
