< "A" fatal error occurs while processing MTU extension. "A" sdk12.3 52832 Peripheral function "B" sdk15.2 52832 Central function > 0> APP:INFO:Start scanning for device name Cretam_Safety. 0> APP:INFO:Fast Advertising 0> APP:INFO:Multilink Example 0> APP:INFO:Peripheral connected 0> BLE_GATT:INFO:on_connected_evt(nrf_ble_gatt_t * p_gatt, ble_evt_t * p_ble_evt) 0> BLE_GATT:INFO:request ATT MTU 64 for conn_handle 0 0> SDH:DEBUG:sd_ble_enable: RAM start at 0x200056a8 ===================================================== < "A" sdk12.3 52832 Peripheral function "B" nRFTool -> UART on smartphone > 0> APP:INFO:Peripheral connected 0> BLE_GATT:INFO:on_connected_evt(nrf_ble_gatt_t * p_gatt, ble_evt_t * p_ble_evt) 0> BLE_GATT:INFO:request ATT MTU 64 for conn_handle 0 0> BLE_GATT:INFO:EXCHANGE_MTU_RSP effective ATT MTU is 64 for conn_handle 0 0> APP:DEBUG:ATT MTU exchange completed. central 0xf7 peripheral 0x40 =====================================================