add a todo for sim800l response parsing

src/modem.rs

@@ -223,6 +223,12 @@ impl<UART: serial::Uart> Modem<UART> {
         loop {
             let reply = self.send_command(Command::tcp_receive(MAX_TCP_MANUAL_REPLY_SIZE))
                 .map(|reply| {
+                    // TODO: parse the response properly
+                    // 1. the first line is \r\n
+                    // 2. next is the +CIPRXGET: 2,X,Y where X is the number of bytes read and Y is
+                    //    the number of bytes left to be read
+                    // 3. immediately after this the payload is returned (with size X)
+                    // 4. OK
                     reply
                         .split("\r\n")
                         .filter(|line| line.len() > 2 && !line.contains("+CIPRXGET: 2,"))