There is an undocumented payload limitation when sending messages from the ThingShield to the SmartThings hub. I did some testing using the 24 channel irrigation controller. In this case,the limitation was a hard cutoff between 65 and 70 characters (I didn't narrow it any further). My work around was to split the payload into two separate messages, adding in delay of 2 seconds between each message.
This is less than desirable since the delay makes the Device Type appear "sluggish" to the end user.
There is an undocumented payload limitation when sending messages from the ThingShield to the SmartThings hub. I did some testing using the 24 channel irrigation controller. In this case,the limitation was a hard cutoff between 65 and 70 characters (I didn't narrow it any further). My work around was to split the payload into two separate messages, adding in delay of 2 seconds between each message.
This is less than desirable since the delay makes the Device Type appear "sluggish" to the end user.