March 5, 2017 at 11:23 am #13516
Following are my suggestions.
- You can transmit data using similar technology that our IR remotes do.
- You can use an IR LED working under high frequency and you can use a TSOP sensor to decode it. For eg. 38KHz and TSOP1738
- For two way transmission you may set one device as master and another one as slave. Slave will transmit data only if it get a command from master. This will ensure that only one device will transmit at a time.
- You may also use two different frequencies. For eg. 30KHz, TSOP4830 and 56KHz, TSOP4856. In this case two devices can transmit data at the same time.