  Internet of Things (IoT) is defined as the connection between places and
physical objects (i.e., things) over the internet/network via smart computing
devices. Traditionally, we learn about the IoT ecosystem/problems by conducting
surveys of IoT developers/practitioners. Another way to learn is by analyzing
IoT developer discussions in popular online developer forums like Stack
Overflow (SO). However, we are aware of no such studies that focused on IoT
developers' security and ML-related discussions in SO. This paper offers the
results of preliminary study of IoT developer discussions in SO. We find around
12% of sentences contain security discussions, while around 0.12% sentences
contain ML- related discussions. We find that IoT developers discussing
security issues frequently inquired about how the shared data can be stored,
shared, and transferred securely across IoT devices and users. We also find
that IoT developers are interested to adopt deep neural network-based ML models
into their IoT devices, but they find it challenging to accommodate those into
their resource-constrained IoT devices. Our findings offer implications for IoT
vendors and researchers to develop and design novel techniques for improved
security and ML adoption into IoT devices.
