OLIMEX AgonLight2, User Manual

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The differences between AgonLight and AgonLight2
AgonLight2 has these differences from the original design:
• KiCad is used for the CAD, instead of EasyEDA. KiCad is open source software – free to download
and use, it is a more fitting CAD tool for an Open Source Hardware project;
• USB-C connector for power supply;
•
DCDC power converter with up to 2A output instead of linear power converter;
•
Li-Po battery backup power supply, the battery acts like a UPS and will power the computer even if
the USB-C gets disconnected. The battery is charged automatically when USB or external power
supply is present;
•
USB connector for keyboard (but the keyboard must be PS2 compatible!!!);
•
SRAM routed with 40 ohm impedance as per part datasheet;
• Fixed some wrong signal naming on ESP32-PICO-D4 GPU co-processor;
• Fixed GPIO and programming connector pin ordering;
•
Replaced the naked header 32-pin connector with a plastic boxed 34-pin connector following the
same layout and adding two additional signals Vbat and Vin which allow AgonLight2 to be powered
by this connector too;
•
Added UEXT connector – it allows AgonLight to be expanded easily (without soldering) with:
temperature sensors, environmental air quality sensors, pressure sensors, humidity sensors,
gyroscopes, light sensors, RS485, LCDs, LED matrices, relays, Bluetooth modules, Zigbee modules,
Lora modules, GSM modules, RFID readers, GPS, pulse, EKG, RTC, etc
;
•
Added 4 grounded mount holes with 3.3mm diameter, but also kept the original 2.5 mm mount holes.
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