Activity › Forums › Questions & Troubleshooting › Software & Firmware › How to use Serial1 (19,18 pin) › Reply To: How to use Serial1 (19,18 pin) Lukas Member February 26, 2019 at 3:33 pm Please, see this thread https://forum.controllino.biz/viewtopic.php?f=4&t=116” class=”bbcode_url”>https://forum.controllino.biz/viewtopic.php?f=4&t=116