Is there a limit to the amount of data that can be transmitted from the companion app on a phone, to the app on the watch, in one call to connectIQ.sendMessage? If so, what is it?
There is no set limit for the amount of data that can be transmitted with sendMessage, though there is an implicit limit based on the available memory left to Connect IQ on the device. Generally, large messages can take some time to send because the data rate for BLE is slow (and is particularly slow when talking to iOS). If the amount of data is too large, the sendMessage will simply fail.
