read reply from tcp server

src/modem.rs

@@ -251,8 +251,27 @@ impl<UART: serial::Uart> Modem<UART> {
         Ok(())
     }
 
+    pub fn tcp_set_manual_receive(&mut self) -> Result<()> {
+        self.send_command(Command::tcp_set_manual_receive())?;
+        Ok(())
+    }
+
+
+    pub fn tcp_receive_query_len(&mut self) -> Result<()> {
+        self.send_command(Command::tcp_receive_query_len())?;
+        Ok(())
+    }
+
     pub fn tcp_send(&mut self, payload: &str) -> Result<()> {
         self.send_data(payload)?;
         Ok(())
     }
+
+    pub fn tcp_receive(&mut self, size: usize) -> Result<String> {
+        self.send_command(Command::tcp_receive(size))
+    }
+
+    pub fn tcp_close_connection(&mut self) -> Result<String> {
+        self.send_command(Command::tcp_close())
+    }
 }