Right EFIS can be used as standalone or together with FCU V1.6 (the older version), by attaching an Arduino Pro Micro to the back.
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If you use FCU V1.7, the Arduino shield V1.7 has the extra pins for left and right EFIS to connect to. this way you use only 1 Arduino Mega Pro for the hole system.
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Left EFIS can be used as standalone or together with FCU V1.6 (the older version), by attaching an Arduino Pro Micro to the back.
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