fix readme and health check

README.md

@@ -6,7 +6,7 @@ Export metrics of a VEGAPULS Air connected via TTN as a prometheus service.
 
 - `mkdir /opt/ttn-vegapulsair-exporter/`
 - `cd /opt/ttn-vegapulsair-exporter/`
-- import `tttn-vegapulsair-exporter.py` and `config.py`
+- import `ttn-vegapulsair-exporter.py` and `config.py`
 - Set the constants in `config.py`
 - `chmod +x /opt/ttn-vegapulsair-exporter/ttn-vegapulsair-exporter.py` 
 - `chown -R prometheus /opt/ttn-vegapulsair-exporter/`

ttn-vegapulsair-exporter.py

@@ -70,7 +70,7 @@ def update_metrics(payload, metadata):
     global mutex
     global scrape_healthy
     mutex.acquire()
-    scrape_healthy = False
+    #scrape_healthy = False
     node_metrics.clear()
 
     if "Distance" in payload: