Bitcraze Forums

Hi, I am trying to estimate the position of the CF and some Bluetooth devices based on the Bluetooth RSSI value. I want to use the built-in EKF inside the CF firmware to realize it. Is it possible? And if it is, are there any materials(codes, similar projects, examples of using EKF, etc) I could ref...

It turns out that except the built-in pull up resistors, an external 10k resistor is also needed for SDA and SCL. After adding the external pull-up resistors, the program works and I can get the data from my sensor.

It turns out that my I2C sensor didn't respond to the "write" command. But I have set it to "I2CDEV_NOMEM_ADDR" and crazyflie should directly send read command instead of sending write command at first. Whatever, I fixed the sensor to make it be able to respond to the write comma...

Here is the images of the ocsilloscope.

When my I2C sensor connecting to crazyflie:



When my I2C sensor connecting to the arduino:

One thing that could be happening is that the bus speed is configured too fast. It is currently configured at 400KHz: https://github.com/bitcraze/crazyflie-f ... _drv.c#L60 If your sensor does not support 400KHz I2C you can change the code above to set the bus at 100KHz. Hi arnaud, I change the bus...

Hi arnaud, Can you test with the stock firmware to start the Crazyflie with and without your connections, that would verify if the problem is there or not. If it is, it would be useful to look at the signals with an oscilloscope to see what goes wrong with it. Are you attaching long cables or extra ...

Hi, it does look like your connections are disturbing the I2C bus, the configuration EEPROM in the Crazyflie is connected to the deck-port I2C bus and so yes there is pull-ups in the Crazyflie on this I2C bus. You can look at the schematic if you want to see more precisely how things are cabled: ht...

Hi, I am trying to add a sensor which would send the data back to crazyflie via the I2C bus so I wrote a deck driver. After I connected the cables (sensor SDA->crazyflie SDA, sensor SCL->crazyflie SCL), the crazyflie couldn't start normally(only two blue LEDs light solidly). There were two times I a...

If there is no diver, it worked fine. And later I tried the older firmware with the hello.c deck diver, it worked well without any problem. I didn't attach any actual deck on the crazyflie.

Hi, I flashed the crazyflie after adding the hello.c as the "howto" deck driver tutorial. It worked fine at first and I can see the "hello" message in the console but after several minutes the crazyflie entered the situation with lighting two red LEDs and one blue LED solidly. Th...