The goal is to send/receive DTMF tones and voice based on FRS radio standard.
By pressing the PPT switch and once the radio channel is open and the communication is established in both units (sender/receiver), the sender unit should be able to transmit, the voice or DTMF tones and the receiver unit should output the analog signal (voice) or decode the DTMF tones and write the digital signals as output. (4 leds)
6 freelancers are bidding on average $640 for this job
I can complete this project and send you a prototype FAST. I can modify existing FRS radio to transmit DTMF by adding a microcontroller, DTMF generator chip and of course the required firmware.
I am offering my services for this project. In case I'm selected, do you need breadboard demonstrations or possibly some PCBs or some PCBs packaged in it.