Hello, I try to follow your guide to apply the correct MOD to free up the Serial port for serial communication, but my IND I/O Board is different from the guide spec.
Actually it has a switch near the top board flat cable connector, is this intended to disconnect rs485?
Otherwise what should I do?
Update: I found the chip, it's moved to the bottom side.
Is the pin number still the same?
Hi, the current INDIO has a hardware switch on the baseboard located near the RS485 terminals, bottom position = RS485 active. No extra MODs necessary for any combination of RS485/RS232/modem, just configure the switches.
Earlier INDIO versions may not have this switch, in which case you can follow instructions in the GPRS manual https://static.industruino.com/downloads/manuals/GSM_GPRS_for_Industruino_product_manual_April'2017.pdf
Pin configuration at https://github.com/Industruino/documentation/blob/master/indio.md#rs485
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