Send fails on type other than string preventing further gateway functioning

[vencax]

Traceback (most recent call last):

File "asyncio/core.py", line 1, in run_until_complete

File "/lib/gateway/gateway.py", line 109, in publisher

File "/lib/gateway/mqtt_as.py", line 800, in publish

File "/lib/gateway/mqtt_as.py", line 412, in publish

File "/lib/gateway/mqtt_as.py", line 431, in _publish

TypeError: object of type 'float' has no len()

[peterhinch]

Try using the json library to convert other Python types to strings.