I've designed various Bluetooth products in the past but have never worked with sub 1Ghz. I have a client that needs a product that can transmit a 2-digit ID over a distance of 200 meters. The product will be sold globally. I'm leaning toward 2.4GHz because it is global but I worry about the 200 meter range. 868/915/920 Mhz would offer better range but adds the complication of using different frequencies for different countries. Also I've never programmed a proprietary RF transceiver. How complex woud it be to program this application? Do you think 868/915/920 MHz is a better solution than 2.4GHz for this application?
Thanks,
John