Problem with RIoTboard, strange characters on PuTTY, wrong resolution in TV by HDMI

Question

Hi, I have a problem with my RIoTboard.

When I bought it, unpacked and connected to the TV via HDMI, this TV had the message "resolution not supported by the TV, change the resolution." When I connected to the UART and watched broadcast in PuTTY is displayed the strange characters I do not resemble logs. I thought that something is wrong with the pre-installed Android. I put the microSD card and installed the new Android on microSD card. After reconnecting still in PuTTY are strange characters and on TV the message at the wrong resolution.

During the installation of switches SW1 were in position 0111011, while the pre-installed Android 10110111 and 10100110 with a microSD card.

I was looking at different sides of similar information RIoTboard behavior, but no one had a similar problem as me.

Transmission parameters such as PuTTY I set in the manual (115200, 8, 1, N, N). I connected the adapter and directly to the hardware COM port. In both cases the effect was the same.

Screenshot of PuTTY.

How can I solve my problem, if I'm doing something badly, or maybe RIoTboard damaged?

Regards Marek

radiatortwo · Accepted Answer

What you´re using is NOT an UART connector. It´s a RS232 Connector. DON´T connect it to the RiotBoard. It uses an absolutely different communications protocol. You´ll need an UART connector like this: UART8000-U is a USB to serial debugging cable I´m using one with a CP2102 Chip by the way.

shabaz · Answer

Hi Marek,

What serial-to-USB device are you using? Do you have a model number or web link to it?

The serial comms is at a very low level (in dedicated hardware on the processor chip) so it is extremely likely you'll see the correct text assuming the serial-USB device is

good and the comms parameters are correct.

Can you post a link or more detail on the serial-USB device?