From b315d1113f1724530dcc54f36f35574279ba3318 Mon Sep 17 00:00:00 2001
From: Kevin Walton <kevin@unseen.org>
Date: Fri, 9 Apr 2021 21:14:39 +0100
Subject: [PATCH] Error in Habhub checksum format breaks Habhub upload

Error in Habhub checksum breaks Habhub upload if the first character in the checksum is a Zero - so forced to always be 2 characters.  I found the bug live this evening, fixed, and confirmed working now.
---
 telemetry.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/telemetry.py b/telemetry.py
index f07b0eb..1a79321 100644
--- a/telemetry.py
+++ b/telemetry.py
@@ -574,7 +574,7 @@ def process_telemetry(spots, balloons, habhub_callsign, push_habhub, push_aprs,
                             while i < len(telestr):
                                 checksum = checksum ^ ord(telestr[i])
                                 i+=1
-                            telestr = "$$" + telestr + "*" + '{:x}'.format(int(checksum))
+                            telestr = "$$" + telestr + "*" + '{:02x}'.format(int(checksum))
                             logging.info("Telemetry: %s", telestr)
 
                             # Check if string has been uploaded before and if not then add and upload