iotile-gateway throwing away scan packet fields?

[mattrunchey]

Somewhere in iotile-gateway, scan packets are being modified before it ends up at a consumer (via hw.scan(), for example).

We discovered this because some of our systems rely on finding the signal_strength field in a packet to collect diagnostics.

I am looking for where in coretools this is happening and will update if I find it (opening a ticket now in case anyone finds it faster!)

[mattrunchey]

Testing to discover this

You can run two programs side by side to see the difference in packet outputs.

from iotile.core.hw.hwmanager import HardwareManager
with HardwareManager(port='{ws:localhost}|{bled112}') as hw:
  results = hw.scan()
  for dev in list(results):
    print(dev)

Compare the dev print between the two port settings above.
A packet from the gateway's port looks like

{'uuid': 42, 'connection_string': 'device/2a', 'expiration_time': 8200.031356979, 'slug': 'd--0000-0000-0000-002a'}

A packet from the bled112 port looks like

{
    "advertising_version": 1,
    "connection_string": "88:6B:0F:B2:74:29",
    "expiration_time": 8912.371642329,
    "low_voltage": false,
    "pending_data": false,
    "signal_strength": -39,
    "slug": "d--0000-0000-0000-002a",
    "user_connected": false,
    "uuid": 42,
    "validity_period": 60
}

[mattrunchey]

@timothyfroehlich for investigation so far.

iotile-gateway puts the signal_strength field in here and it's possible that somewhere in the transport_plugin we're using that the field isn't sent along