How much is Edison's TTL level? And for Arduino and Mini breakout.

[LLee28]

1. Recently, I want to use Edison (mini breakout) to read serial data from STM32 (3V3 ttl level), can I directly connect the TX and RX from STM32 to my Edison?

2. Furthermore, I have tried to directy connect the STM32 to Edison for Arduino expansion, but i cannot received any data. I think the parameter was correct, Band rate was 115200. Here is my connection:

STM32 RX<--------->TX Edison for Arduino

TX<---------->RX

3. So I guess maybe that's related to TTL level.

Pls help,

Many thanks.

[VIvan7]

The Edison module operates at 1.8V. You need a level translator, probably, a bidirectional one.

You probably have to initialize GPIOs on the Arduino module. They have different modes. Check the Arduino for Edison documentation about pinmuxing.

[idata]

Hi Lane,

Here's the documentation with all these specifications. This is the http://download.intel.com/support/edison/sb/edisonmodule_hg_331189004.pdf Edison Module Hardware Guide, with all the information about its operation, and this is the http://download.intel.com/support/edison/sb/edisonarduino_hg_331191007.pdf Edison Arduino Board Hardware Guide where you can check instructions on how to initialize the GPIO as Vincenze mentioned.Regards,Pablo

[LLee28]

Hi, Pablo,

Thanks for your reminding. I will check the guide again carefully. And will give a feedback soon.

Thanks,

Lane

[LLee28]

Hi, Pablo,

I followed this thread , And It works now.

thanks,

Lane