User's Manual DG100 IoT Gateway
Device Description
3.1 External connectors
On the front side panel there are connectors for a power supply and communication
interfaces.
3.1.1 Serial1 and Serial2
These two RJ45 connectors have same pinout and function. They serve as RS232 and RS485
interfaces for i.MX6ULL UARTs. Both ports are galvanically isolated from processor board and
power supply. Serial1 is connected to
ttymxc3
and
Serial2
is connected to
ttymxc4
. Both
interfaces, RS232 and RS485, are operational at the same time. Data is sent on both interfaces
but receiving is possible only from one interface at the time, needing some protocol discipline.
The connector has light indications for transmit (left position - yellow color LED) and receive
data (right position - red color LED).
Connector RJ45 pinout is shown on next picture.
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Fig. 2: External connectors on front side panel
Fig. 3: Serial RJ45 female connector pinout
