fix(senML): handle timestamp only object

features/ButtonPresses.feature.md

@@ -0,0 +1,47 @@
+---
+exampleContext:
+  fingerprint: 92b.y7i24q
+  fingerprint_deviceId: oob-352656108602296
+  ts: 1694503339523
+  APIURL: https://api.hello.nordicsemi.cloud
+---
+
+# Publish Button presses
+
+> Button presses are special in that they only have a Time resource and use the
+> instance ID to signify the ID of the pressed button.
+
+## Background
+
+Given I have the fingerprint for a `PCA20065` device in `fingerprint`
+
+And I connect to the websocket using fingerprint `${fingerprint}`
+
+## Receive published button press
+
+Given I store `$millis()` into `ts`
+
+When the device `${fingerprint_deviceId}` does a `POST` to this CoAP resource
+`/msg/d2c/raw` with this SenML payload
+
+```json
+[
+  {
+    "bn": "14220/1/",
+    "bt": "$number{$floor(ts/1000)}"
+  }
+]
+```
+
+Soon I should receive a message on the websocket that matches
+
+```json
+{
+  "@context": "https://github.com/hello-nrfcloud/proto/lwm2m/object/update",
+  "ObjectID": 14220,
+  "ObjectInstanceID": 1,
+  "Resources": {
+    "99": "$number{$floor(ts/1000)}"
+  }
+}
+```

package.json

@@ -132,7 +132,7 @@
     "@hello.nrfcloud.com/lambda-helpers": "2.0.30",
     "@hello.nrfcloud.com/nrfcloud-api-helpers": "6.0.2",
     "@hello.nrfcloud.com/proto": "15.3.0",
-    "@hello.nrfcloud.com/proto-map": "16.1.7",
+    "@hello.nrfcloud.com/proto-map": "16.1.8",
     "@middy/core": "5.5.0",
     "@middy/input-output-logger": "5.5.0",
     "@sinclair/typebox": "0.33.12",