I am using Google Coral DevKit and I would like to connect UART3 (ttymxc2) with external device, I connect it to FTDI for debugging and I could send from coral but I couldn't receive. I managed to use UART1 Transmit & Receive Successfully. But my requirement is to use UART3.
any help?
Solved by updating OS to latest version
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So what I have right now is:
A Raspberry Pi 3B+ and an Arduino Uno connected by serial communication
A react native expo mobile application
Firebase real-time database
For the Raspberry Pi and Arduino, the raspberry pi executes a python code that runs the Arduino code that takes values from a sensor connected to the Arduino Uno.
What I'm trying to do is use the react native app to execute the python code and store the values recorded from the sensor in the real-time database.
I've been searching all sorts of documentation and videos, but could not find something that relates to what I'm trying to do.
If anyone could give me a lead on how to approach this subject, it would be much appreciated.
Do let me know if any of you need any more clarification on the subject.
Actually, The data pipeline is as follows. I know that there is a firebase library for both python and react native. Using this library, connect to firebase realtime and make the necessary data pipeline.
My goal is to setup my Raspberry Pi 4 to be able to run scripts when a button is clicked in an app I am making with React Native. I need to be able to do it so that they can connect without wifi, which is why I have decided to use Bluetooth.
So far I have an RFCOMM server set up on the Pi, and have installed the react-native-ble-plx module to be able to handle bluetooth communications, but I'm not sure how to get React Native to connect to this server.
I'd really appreciate it if anyone can tell me how to connect them and send data to the Pi to get it to run terminal commands, and return the result.
There are two types of Bluetooth that are not compatible with each other. RFCOMM and BLE will not work together.
On the Raspberry Pi you need to create a GATT server. RPi uses the BlueZ stack and they have an example in their source tree:
https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/test/example-gatt-server
You will also need to have an advertisement so that your phone can find the gatt server. There is also an example of that: https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/test/example-advertisement
Another suggestion is not to try and develop both ends of the Bluetooth link at the same time as that is tricky. Use a generic BLE tool to check you have the server working correctly before you develop the react app.
The Azure Kinect sensor SDK requires Kinect to connect directly to pc via usb, but it's not appropriate to me. Is it posible to use something like raspberry pi to transfer kinect sensor data and process on a remote server? Do you have any suggestions for this?
I found the Kinect sdk does not support ARM architecture(raspberry pi)，what other device can I use?
Processing the depth camera image requires GPU compute, so we don't currently support headless operation. There are some users that have successfully enabled headless operation on Linux, but it is not a straight forward path. See https://github.com/microsoft/Azure-Kinect-Sensor-SDK/issues/810 for more info.
I have done this when running Debian using gpsd. But when running Windows IoT preview...what is a way to get the NMEA sentences off an attached GPS (on the USB port). Is that kind of support around yet?
Currently this support is not yet available but it is being actively developed. Furthermore the Geolocator API is broken. Unfortunately I don't have an ETA for this but its coming.
Mark Radbourne (MSFT)
It working on same OS machine. If i am publisher with used of mac machine and subscriber side am using ubuntu os then give server connection timeout error.
If OpenTok is working on the same machine but not across multiple machines, the issue is most likely caused by your network. You can check if your network supports webrtc using this tool: https://chrome.google.com/webstore/detail/opentok-diagnostic/elanokbchpinmganpfaigciognfpcfei
If you are using flash, you have to enable rmtp ports. Check your network by going to the flash diagnostic tool here: http://tokbox.com/user-diagnostic/