Serial oled display kits picaxe picaxe axe134y this serial oled 20 x 4 kit axe134y is a budget conscious serial oled module that features a 20 x 4 yellow on black alphanumeric display allowing the visual display of user instructions sensor reading etc of picaxe microcontroller projects connection is via a simple 1 wire serial interface the included picaxe 18m2 is fitted on to a small serial interface pcb and is pre programmed with the open source axe134 firmware that allows the microc