From 93e0bf890295387e8d8d72ae7a0e551a8a84d018 Mon Sep 17 00:00:00 2001
From: Laurens Valk <laurens@pybricks.com>
Date: Fri, 8 May 2020 11:21:27 +0200
Subject: [PATCH] hub: check response to size message

The hub responds to every message with a checksum. The mpy size message is no different, so we need to read it.

This fixes the checksum messages being out of sync by one.
---
 src/actions/hub.ts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/actions/hub.ts b/src/actions/hub.ts
index 1fc80b8b..c6fc209e 100644
--- a/src/actions/hub.ts
+++ b/src/actions/hub.ts
@@ -57,10 +57,12 @@ export function downloadAndRun(data: ArrayBuffer): HubThunkAction {
         // TODO: might need to flush checksum queue here
 
         // first send payload size as big-endian 32-bit integer
+        const size_checksum = getChecksum();
         const sizeBuf = new Uint8Array(4);
         const sizeView = new DataView(sizeBuf.buffer);
         sizeView.setUint32(0, data.byteLength, true);
         await dispatch(write(sizeBuf));
+        console.log(await size_checksum);
 
         // Then send payload in 100 byte chunks waiting for checksum after
         // each chunk