Yes,It can functionally be replaced. Its cc1310 is not supported LoRa modulation, and the supported modulation is GFSK and FSK.

The MS23SF14 module supports the full band, the default is EU868. And other bands can be customized according to customer needs.

Yes, the maximum measured city distance is about 3KM.

1. SX1278/SX1276 package are 6x6mm, 28-pin QFN package；the chip volume and STM32WLE5CCU6 package is 7x7mm, 48-pin UQFN package, the chip volume without MCU is relatively only small 1x1mm.

2. STM32WLE5CCU6 support the frequency band is 150MHz ~ 960MHz, and the replacement of the frequency band only need to modify the software parameters; SX1278 support the frequency band of 137-525MHz, modify the frequency band need to modify the peripheral pin

3. SX1278/6 power 20dBM than SX1262 power 22dBM smaller, SX1278/6 receiving current of about 12mA and STM32WLE5CCU6 in DC-DC mode, receiving current of about 5mA, the relative receiving power consumption is larger

4. STM32WLE5CCU6 is larger than the SX1278/6 air rate: 62.5kbps (SX1278/6:37.5kbps)

Only one master and one slave can be achieved by using the pass-through firmware. If users develop their own programs, multiple masters and slaves are possible to be achieved. 

Classic Bluetooth: BT Low Power Bluetooth: BLE

No, it doesn't. Our hardwares don't design two pins with Antenna.

AT firmware does not support Ble mesh and WiFi mesh for now. The users can develop this function by themselves using ESP-MDF framework.