Increase Packet timeout from 1 to 2 sec (increase reliability over slow Bluetooth LE connections)

ChangeLog

@@ -29,6 +29,7 @@
             Bangle.js: setUI/etc now don't draw a 'back' icon if there is no widget bar (or it's hidden)
             ESP32: Remove FlashFS, adjust partitions to increase available Storage from 256kB to 896kB
             Storage: Don't attempt to compact if it's obvious that we don't have space for the file even when compacted
+            Increase Packet timeout from 1 to 2 sec (increase reliability over slow Bluetooth LE connections)
 
      2v25 : ESP32C3: Get analogRead working correctly
             Graphics: Adjust image alignment when rotating images to avoid cropping (fix #2535)

README_Protocol.md

@@ -56,6 +56,11 @@ Following transmission of a packet (or after timeout of 1 second), there will be
 | `ACK`  | 6               | Acknowledged successful receipt.        |
 | `NACK` | 21              | Negative acknowledgement, unsuccessful. |
 
+### Timeouts
+
+* If a single packet takes more than 2 sec to transmit (1 sec on 2v25) Espruino will send `NAK` and will return to normal REPL mode.
+* If there's more than a 10 sec gap between DATA transfers for a file, Espruino will automatically close the transfer and the file. Subsequent DATA packets will be `NAK`ed as no file is open.
+
 ### Example
 
 As an example, to create a file named `hello.txt` with the content `Hello World`, the packet is constructed as follows:

src/jsinteractive.c

@@ -1644,7 +1644,7 @@ static void jsiPacketStart() {
   inputState = IPS_PACKET_TRANSFER_BYTE0;
   jsiInputLineCursorMoved(); // unlock iterator
   jsvObjectSetChildAndUnLock(execInfo.hiddenRoot, "PK_IL", inputLine); // back up old inputline
-  jsvObjectSetChildAndUnLock(execInfo.hiddenRoot, "PK_TIMEOUT", jsiSetTimeout(jsiPacketTimeoutHandler, 1000));
+  jsvObjectSetChildAndUnLock(execInfo.hiddenRoot, "PK_TIMEOUT", jsiSetTimeout(jsiPacketTimeoutHandler, 2000));
   inputLine = jsvNewFromEmptyString();
 }