diff --git a/lambda/ham_put_api/__init__.py b/lambda/ham_put_api/__init__.py
index 4077cdd..aa2edae 100644
--- a/lambda/ham_put_api/__init__.py
+++ b/lambda/ham_put_api/__init__.py
@@ -20,6 +20,10 @@ def check_fields_are_number(field, telemetry):
 
 def telemetry_filter(telemetry):
     fields_to_check = ["alt", "lat", "lon"]
+    required_fields = ["datetime", "uploader_callsign", "software_name"] + fields_to_check
+    for field in required_fields:
+        if field not in telemetry:
+            return (False, f"Missing {field} field")    
     for field in fields_to_check:
         field_check = check_fields_are_number(field, telemetry)
         if  field_check[0] == False:
@@ -29,6 +33,11 @@ def telemetry_filter(telemetry):
 
     return (True, "")
 
+# Returns true for anything that should be hidden
+def telemetry_hide_filter(telemetry):
+    if telemetry["payload_callsign"] in ['MYCALL','4FSKTEST','4FSKTEST-V2']:
+        return True
+    return False
 
 def post(payload):
     sns.publish(
@@ -58,12 +67,16 @@ def upload(event, context):
         payload["position"] = f'{payload["lat"]},{payload["lon"]}'
 
         valid, error_message = telemetry_filter(payload)
+
         if not valid:
             errors.append({
                 "error_message": error_message,
                 "payload": payload
             })
         else:
+            # Apply hide field for anything that matches our filters
+            if telemetry_hide_filter(payload):
+                payload["telemetry_hidden"] = True
             if "uploader_position" in payload:
                 if not payload["uploader_position"]:
                     payload.pop("uploader_position")
diff --git a/lambda/ham_put_api/__main__.py b/lambda/ham_put_api/__main__.py
index c11c039..fa00c4f 100644
--- a/lambda/ham_put_api/__main__.py
+++ b/lambda/ham_put_api/__main__.py
@@ -1,4 +1,47 @@
 from . import *
+import json
+import base64
+import gzip
+import uuid
+from io import BytesIO
+body = [
+    {
+    "software_name": "radiosonde_auto_rx",
+    "software_version": "1.5.5",
+    "uploader_callsign": "sdf",
+    "payload_callsign": "4FSKTEST",
+    "uploader_antenna": "1/4 wave monopole",
+    "time_received": "2021-12-30T03:55:05.510688Z",
+    "datetime": "2021-12-30T03:55:05.510688Z",
+    "manufacturer": "Graw",
+    "type": "DFM",
+    "subtype": "DFM09",
+    "serial": "00000000",
+    "frame": 1313391064,
+    "lat": 47.8319,
+    "lon": 10.89474,
+    "alt": 1717.93,
+    "temp": 7.4,
+    "vel_v": 2.51,
+    "vel_h": 8.18,
+    "heading": 81.51,
+    "sats": 9,
+    "batt": 5.32,
+    "frequency": 402.509,
+    "snr": 13.3,
+    "position": "47.8319,10.89474",
+    "uploader_alt": 545,
+    "uploader_position": [None,None,None],
+  }]
+
+compressed = BytesIO()
+with gzip.GzipFile(fileobj=compressed, mode='w') as f:
+    f.write(json.dumps(body).encode('utf-8'))
+compressed.seek(0)
+bbody = base64.b64encode(compressed.read()).decode("utf-8")
+
+
+
 payload = {
     "version": "2.0",
     "routeKey": "PUT /sondes/telemetry",
@@ -36,7 +79,7 @@ payload = {
         "time": "31/Jan/2021:00:10:25 +0000",
         "timeEpoch": 1612051825409,
     },
-    "body": "H4sIAI8ihGIAA42Sz0/CMBTH7/wVhDPUdt3cxlnxYLwoepCQ5cEesKRrZ9cNifF/t53rJHCxhyb7vs/78X3rajS256u7J7XamSNozCSUOJmPJxryQtVK5phBY1SmPyfTC7RFXRdKOpqRiEQeaCqhIEedbUGIuth3xNsjX7w+z5b3L8srDqRBKaErdBOOj9DiuFRSVUqgh01RYqZxi0WLuSMDGrAZC2acLimfR9Gc2hEYvU2Sd5+Tg0GX90+8BNnsYGsajdqlPGg4Du1PVVfmbvE07KHZnKk0HXTUBQgn0/74yE7/Lpdxxnlqm4d9QIBxfBiThLOhkOh2yyhJ0jD2KAiHspjFJOV+OCwrK8bEQy2KrLVKYC2eSQcrJYQlvXRA+4/l3onsD6zB1FZK+88NGNcwIjwYXOBHg3J7snJIbQvq2Vrqzh3xg1WqLkz/RHpzU+/n+hV0zqIwugycVVnJRojpcK0t+T1a/wDKy8FaygIAAA==",
+    "body": bbody,
     "isBase64Encoded": True,
 }
 print(lambda_handler(payload, {}))