Hi guys,
After some research I found that we can put at most one RS232, one SPI, and multiple I2C on the same UEXT line. Am I right?
But what about the MOD-WIFI Module? In its schematics (https://www.olimex.com/Products/Modules/Ethernet/MOD-WIFI/resources/MOD-WiFi-RevA-schematic.pdf) it seem to use, or be connected to, all UEXT pins. Not only the SPI but also the RS and I2C.
Can we then use a UEXTx5 splitter to connect one MOD-WIFI and one or more I2C modules?
My specific targeted setup is to use a Olimexino-32U4 with one MOD-WIFI, one MOD-IO2 and one MOD-RTC on the same UEXT. Does that sound ok?
Thank you!
Hey Arko,
After some research I found that we can put at most one RS232, one SPI, and multiple I2C on the same UEXT line. Am I right?
Correct.
But what about the MOD-WIFI Module? In its schematics it seem to use, or be connected to, all UEXT pins. Not only the SPI but also the RS and I2C.
Can we then use a UEXTx5 splitter to connect one MOD-WIFI and one or more I2C modules?
No. MOD-WIFI uses SPI + two extra signals for interrupt and reset which are not I2C. While it can fit UEXT connectors the board needs more than SPI.
My specific targeted setup is to use a Olimexino-32U4 with one MOD-WIFI, one MOD-IO2 and one MOD-RTC on the same UEXT. Does that sound ok?
The WIFI module might be problematic. WIFI is generally not that easy to handle. OLIMEXINO-32u4 is not a bad board but it lacks the computing power for proper Ethernet or WIFI connection. I recommend you to first check the examples for the board and then make your choice.
Best regards,
Lub/OLIMEX
Thank you for your answer Lub!
All clear, MOD-WIFI needs more than the SPI pins on the UEXT connector.
I'll check out the examples for implementation and see if it fits the 32U4 (my needs are really simple: small JSON response to an HTTP request).
If not, I might ramp up to the 328(Edit: same memory, less features. Doh!) or look at PIC32 solutions, but that's another platform...
thx
Best regards