====== Indigo v4 Incompatibility with i2CS Firmware Modules ======

Most newer INSTEON modules have the i2CS firmware, which includes many reliability improvements.

However, the extensive Indigo changes required for the i2CS firmware compatibility are only available in Indigo 5 and higher. You can [[http://www.indigodomo.com/downloads|download the latest version of Indigo here.]] Note that all major version upgrades to Indigo are paid upgrades, but upgrade discounts are available. To upgrade [[http://www.indigodomo.com/purchase-upgrade|visit our purchase page]] and enter your current registration code and we'll show your specific upgrade discount eligibility. You can also register for a [[http://www.indigodomo.com/register-trial|free 30 day trial of the latest version of Indigo]] to make sure it supports all of your INSTEON modules.