Board Layout (Top View); Target Market And Purpose Of The Board - OLIMEX MOD-IO2 User Manual

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1 .3 Board layout (top view)

Mounting hole
PGM1 jumper,
used for I2C
address change
CON4 with
unused signals
UEXT male
connector
UEXT male
power enable
SMT jumper
7 terminals for GPIO/ADC/PWM + 3.3V output + GND

1.4 Target market and purpose of the board

MOD-IO2 is an extension development board which can interface other Olimex boards via UEXT
connector it adds add RELAYs and GPIOs (or ADC, or PWM). Multiple MOD-IO2s are stackable and
individually addressable. The firmware allows you to interact with the board using simple commands and
yet if you wish you can modify the firmware for your needs.
If you work with any of our development boards with UEXT connector and you need more GPIOs and
RELAY outputs you can add these by attaching MOD-IO2 to your development board. This board allows
easy interfacing to 2 relays and 7 GPIOs. MOD-IO2 is stackable and addressable – these boards can be
plugged together and you can add as many inputs and outputs as you want! 2-4-6-8 etc! MOD-IO2 has
CH32V003 RISC-V microcontroller and the firmware is open source and available for modification.
The board is a very good addition to most of the Olimex boards if you need GPIOs or analog inputs or
relays.
Relay terminals for the 5V
relays and status LEDs
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MOD-IO2 user's manual
Power good LED
PWR JACK for 12V DC
INPUT ONLY!
UEXT female
connector
Female UEXT
I2C pull-up
jumpers and
power enable
SMT jumper