Help to newbie, please

[Aynur Ishbuldin]

Hello all.

I have OLinuXino A20-Micro, but I'm new to working with single-board computers and linux.
I also have a MOD-RS232, MOD-RS485-ISO and MOD-RTC.
There is a Debian distribution on the microSD-card.
I tried to change the settings (specifically uart_para *) through script.fex to make ports (/dev/ttyS*) work, but I did not.
I did not find detailed information about configuring COM-ports on that computer.
Please tell me what needs to be done to turn these MODs.

Thank you.

[olimex]

on Github there are demo examples
RTC https://github.com/OLIMEX/OLINUXINO/tree/master/SOFTWARE/A13/MOD-RTC
MOD-RS485-ISO https://github.com/OLIMEX/OLINUXINO/tree/master/SOFTWARE/A13/MOD-RS485-ISO
MOD-RS232 is simple TTL to RS232 converter all you have to do is to plug it to UEXT and work

[Aynur Ishbuldin]

on Github there are demo examples
RTC https://github.com/OLIMEX/OLINUXINO/tree/master/SOFTWARE/A13/MOD-RTC
MOD-RS485-ISO https://github.com/OLIMEX/OLINUXINO/tree/master/SOFTWARE/A13/MOD-RS485-ISO
MOD-RS232 is simple TTL to RS232 converter all you have to do is to plug it to UEXT and work

Thank you very much!

MOD-RTC: works well.
MOD-RS485-ISO: I get "Failed reading from the I2C-bus: Communication error on send" message when I try to read/write via i2c-tool.
i2cdetect can't find address 0x48 in /dev/i2c-{0,1,2}
May be firmware doesn't exist in the MOD? How can I get it worked?

Thanks.

[Leonardo]

MOD-RS485-ISO: I get "Failed reading from the I2C-bus: Communication error on send" message when I try to read/write via i2c-tool.
i2cdetect can't find address 0x48 in /dev/i2c-{0,1,2}
May be firmware doesn't exist in the MOD? How can I get it worked?

Thanks.

Hello! I have the same problem with a Olinuxino A20 rev.C and a MOD-RS485-ISO rev.A. Did you solve the problem?

Leo

[dave-at-axon]

Hi Leonardo,

See my comments in this thread about the MOD-RS485-ISOL.

https://www.olimex.com/forum/index.php?topic=2964.msg12422#msg12422

You might find it quite a bit of work to get it working.