From d367c20a138d90b640947194d264f8108845b207 Mon Sep 17 00:00:00 2001
From: MichaelDvP <github@mdvp.de>
Date: Mon, 8 Aug 2022 09:58:13 +0200
Subject: [PATCH] add disconnected banner to dashboard, #591

---
 interface/src/project/DashboardData.tsx | 5 +++--
 interface/src/project/types.ts          | 1 +
 src/web/WebDataService.cpp              | 1 +
 3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/interface/src/project/DashboardData.tsx b/interface/src/project/DashboardData.tsx
index 0ef771e50..319e7215e 100644
--- a/interface/src/project/DashboardData.tsx
+++ b/interface/src/project/DashboardData.tsx
@@ -79,7 +79,7 @@ const DashboardData: FC = () => {
 
   const { enqueueSnackbar } = useSnackbar();
 
-  const [coreData, setCoreData] = useState<CoreData>({ devices: [], active_sensors: 0, analog_enabled: false });
+  const [coreData, setCoreData] = useState<CoreData>({ connected: true, devices: [], active_sensors: 0, analog_enabled: false });
   const [deviceData, setDeviceData] = useState<DeviceData>({ label: '', data: [] });
   const [sensorData, setSensorData] = useState<SensorData>({ sensors: [], analogs: [] });
   const [deviceValue, setDeviceValue] = useState<DeviceValue>();
@@ -640,7 +640,8 @@ const DashboardData: FC = () => {
 
   const renderCoreData = () => (
     <IconContext.Provider value={{ color: 'lightblue', size: '24', style: { verticalAlign: 'middle' } }}>
-      {coreData.devices.length === 0 && <MessageBox my={2} level="warning" message="Scanning for EMS devices..." />}
+      {!coreData.connected && <MessageBox my={2} level="error" message="EMSbus disconnected, check settings and board profile" />}
+      {coreData.connected && coreData.devices.length === 0 && <MessageBox my={2} level="warning" message="Scanning for EMS devices..." />}
       <Table data={{ nodes: coreData.devices }} select={device_select} theme={device_theme} layout={{ custom: true }}>
         {(tableList: any) => (
           <>
diff --git a/interface/src/project/types.ts b/interface/src/project/types.ts
index 0d5a1834b..d990e7381 100644
--- a/interface/src/project/types.ts
+++ b/interface/src/project/types.ts
@@ -97,6 +97,7 @@ export interface SensorData {
 }
 
 export interface CoreData {
+  connected: boolean;
   devices: Device[];
   active_sensors: number;
   analog_enabled: boolean;
diff --git a/src/web/WebDataService.cpp b/src/web/WebDataService.cpp
index fc60055dc..ea9520ed0 100644
--- a/src/web/WebDataService.cpp
+++ b/src/web/WebDataService.cpp
@@ -94,6 +94,7 @@ void WebDataService::core_data(AsyncWebServerRequest * request) {
     // sensors stuff
     root["active_sensors"] = EMSESP::dallassensor_.no_sensors() + (EMSESP::analogsensor_.analog_enabled() ? EMSESP::analogsensor_.no_sensors() : 0);
     root["analog_enabled"] = EMSESP::analogsensor_.analog_enabled();
+    root["connected"]      = EMSESP::bus_status() != 2;
 
     response->setLength();
     request->send(response);