Bitcraze Forums

Hello
I read that the Crazyradio can be externally powered. Unfortunately I couldn't find any description on which pins to use.
Does it help the amplification if it does not use USB Power?

The loss rate is almost 0% with 250K. So the error was using the 2M

Could it be, that it is also depending on the package length?
When i tested with 1byte data it was 20%
when i tested with 19byte data it was 80%

I'm using the Cflie library from Jan Winkler. When I tested the connection I found out, that there is approximately a 20% loss rate. Is this normal? Meaning that it is also so high for the normal Crazyflie communication?

you can use the c++ library from Jan Winkler to get some of the information: https://github.com/fairlight1337/libcflie

Is ist possible that not every package that is actually sent is received by the Crazyflie?

Did anyone test it on Windows yet?

Ok. Is there some timing limit for the Crazyradio?
I realized that messages are missed when I sent them back. Maybe I'm to slow.

OK thank you. I made it work to actually send messages to the NRF chip using regular UART. I didn't manage it yet using DMA. Why did you implement DMA over normal UART messages?

Ok, that sounds reasonable. That means it is better to use 1M or 2M instead? What about the maximum size that can be transmitted over radio. I saw that the data is limited to 32 bytes (SYSLINK_MTU). Is that just a restriction from you, or did you find out, that there were problems transmitting large...

So if the FLOW_CTRL is HIGH, the STM32 can't send?

That means you have two flow controls implemented? One for the Syslink transfer that is controlled using the NRF_FLOW_CTRL line and one for the radiolink which can only send when messages are received?