Would love to see a power efficient device streamlined for texting with this. A smartphone is so overkill and battery wont last that long.

Would also be nice not to connect with bluetooth. Either connect with a cable, make it an all-in-one texter/transmitter, or make it all-in-one but detachable. I guess this is starting to reach, but bluetooth is just too finicky for something with this use case IMO. I can see the value in wireless pairing though - you could put the transmitter up a bit higher and text on the ground.