From 323fc26754a62fe005b233b80a2eabf10146b779 Mon Sep 17 00:00:00 2001
From: Dean Cording <dean@cording.id.au>
Date: Wed, 2 Mar 2022 21:22:01 +1000
Subject: [PATCH] Fix for NaN values on startup that upset Javascript JSON
 decoders

---
 dish_grpc_mqtt.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/dish_grpc_mqtt.py b/dish_grpc_mqtt.py
index 0fc4912..8f64878 100644
--- a/dish_grpc_mqtt.py
+++ b/dish_grpc_mqtt.py
@@ -20,6 +20,7 @@ import signal
 import sys
 import time
 import json
+import math
 
 
 try:
@@ -135,7 +136,9 @@ def loop_body(opts, gstate):
             if not "dish_{0}".format(category) in data:
                 data["dish_{0}".format(category)] = {}
 
-            data["dish_{0}".format(category)].update({key: val})
+            # Skip NaN values that occur on startup because they can upset Javascript JSON parsers
+            if not ((type(val) == float) and math.isnan(val)):
+                data["dish_{0}".format(category)].update({key: val})
 
 
         def cb_add_sequence(key, val, category, _):