The EKM ioStack can only be read by the EKM Push3 gateway, which will read all of your ioStacks and send the data to the cloud once per minute for free.
The EKM Widget supports the ioStack for pulse count data, analog sensor data, and 1-Wire sensor data.
We also provide Real-Time and Summary APIs for the ioStack data. The EKM Push Account Portal includes and API Builder for ioStack data so that you can craft Real-Time and Summary API queries.
Encompass supports ioStack for pulse count data just like it does for pulse count data from v.4 Omnimeters.
THESE DO NOT SUPPORT IOSTACK
Push3 I2C data (support undecided)
Push2 (no support planned)
Encompass sensor data (support undecided)
EKM Dash (no support planned)