I have a few Xbee pro 868 modules and need to connect them in a network with the same frequency. As a result, I'll have to purchase new 868 MHz XBee modules. My issue is that Xbee-PRO 868 modules and the latest design Digi XBee modules can communicate with each other. It is very important for my business ( https://www.edenderma.com/ ) So which way is best to communicate with each other?