Device recommendation

Hello,
we are looking for a gateway device replacement for our client that meets non-standard requirements. I see that the RAK devices seem to be quite configurable. Would you recommend if any of your devices meet our requirements?

  • [Required] 868.3 MHz 2-FSK receive/transmit (ability to communicate with EZRadio) for backward compatibility.
  • [Required] LoRa support for new devices.
  • [Required] Any kind of storage (SD card is fine) for data storage
  • [Required] 3G/LTE internet connection to send data
  • [Optional] WiFi connection
  • [Required] fully programmable (ideally C++), available API to receive RF data, process custom business logic, send data to server
  • [Advantage] battery backup for 1d+ (else we need to find a powerbank solution or something similar)
  • [Mandatory] optically professional all-in-one device, not some wire spiders.

If you don’t have any such device in your portfolio, does anyone know of such a device on the market?

Thanks