Iono Pi User Guide February 2021 Revision 015 IPBB20R Iono Pi board IPMB20R Iono Pi with Raspberry Pi 3 Model B IPMB20RP Iono Pi with Raspberry Pi 3 Model B+ IPMB20R41 Iono Pi with Raspberry Pi 4 Model B, 1GB IPMB20R42 Iono Pi with Raspberry Pi 4 Model B, 2GB IPMB20R44 Iono Pi with Raspberry Pi 4 Model B, 4GB IPMB20R48 Iono Pi with Raspberry Pi 4 Model B, 8GB Safety information 4 Qualied personnel 4 Hazard levels 4 Safety instructions 5 General safety instructions 5 Battery 5 Introduction 7 Features 8 Usage and connections 9 Device identication 9 Hardware Installation 10 Iono Pi board 10 Iono Pi 10 Replacing the RTC backup battery 10 Terminal blocks 12 Input/Output mapping 14 Power supply 15 Auxiliary voltage outputs 16 AIx: Analog inputs 16 Ox: Relays 17 L1: On-board application LED 17 TTL1: 1-Wire input/output 17 TTLx/DIx: TTL input/output or generic digital inputs 18 OCx/DIx: Open collector outputs or generic digital inputs 20 Real Time Clock 20 ATECC608A secure element 20 Software installation and conguration 22 Installing the Real Time Clock software 22 Testing the Real Time Clock 22 SPI conguration 23 1-Wire conguration 23 GPIO conguration 24 Disabling Bluetooth and WiFi 24 Iono Pi Kernel Module 24 Iono Pi utility 25 Software development 26 1 Iono Pi User Guide